Граф коммитов

3853 Коммитов

Автор SHA1 Сообщение Дата
Christian Borntraeger 725c4d22bb ubsan: allow to disable the null sanitizer
Some architectures use a hardware defined structure at address zero.
Checking for a null pointer will result in many ubsan reports.
Allow users to disable the null sanitizer.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-09-20 14:26:08 +02:00
Linus Torvalds 7fadce0d60 scripts/faddr2line: improve on base path filtering a bit
Due to our compiler include directives, the build pathnames for header
files often end up being of the form "$srcdir/./include/linux/xyz.h",
which ends up having that extra "." path component after the build base
in it.

Teach faddr2line to skip that too, to make code generated in inline
functions in header files match the filename for the regular C files.

Rabin Vincent pointed out that I can't make a stricter regexp match by
using the " at " prefix for the pathname, because that ends up being
locale-dependent.  But this does require that the path match be preceded
by a space, to make it a bit more strict (that matters mainly if we
didn't find any base_dir at all, and we only end up with the "./" part
of the match)

Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Rabin Vincent <rabin@rab.in>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-09-19 14:49:08 -07:00
Josh Poimboeuf 67326666e2 scripts: add script for translating stack dump function offsets
addr2line doesn't work with KASLR addresses.  Add a basic addr2line
wrapper script which takes the 'func+offset/size' format as input.

Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-09-19 12:00:30 -07:00
Nicholas Piggin fbe6e37dab kbuild: add arch specific post-link Makefile
Allow architectures to create arch/xxx/Makefile.postlink with targets
for vmlinux, modules.ko, and clean, which will be invoked after final
linking of vmlinux and modules.

powerpc will use this to check vmlinux linker relocations for sanity,
and may use it to fix up alternate instruction patch branch addresses.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-09-09 10:47:00 +02:00
Stephen Rothwell a5967db9af kbuild: allow architectures to use thin archives instead of ld -r
ld -r is an incremental link used to create built-in.o files in build
subdirectories. It produces relocatable object files containing all
its input files, and these are are then pulled together and relocated
in the final link. Aside from the bloat, this constrains the final
link relocations, which has bitten large powerpc builds with
unresolvable relocations in the final link.

Alan Modra has recommended the kernel use thin archives for linking.
This is an alternative and means that the linker has more information
available to it when it links the kernel.

This patch enables a config option architectures can select, which
causes all built-in.o files to be built as thin archives. built-in.o
files in subdirectories do not get symbol table or index attached,
which improves speed and size. The final link pass creates a
built-in.o archive in the root output directory which includes the
symbol table and index. The linker then uses takes this file to link.

The --whole-archive linker option is required, because the linker now
has visibility to every individual object file, and it will otherwise
just completely avoid including those without external references
(consider a file with EXPORT_SYMBOL or initcall or hardware exceptions
as its only entry points). The traditional built works "by luck" as
built-in.o files are large enough that they're going to get external
references. However this optimisation is unpredictable for the kernel
(due to above external references), ineffective at culling unused, and
costly because the .o files have to be searched for references.
Superior alternatives for link-time culling should be used instead.

Build characteristics for inclink vs thinarc, on a small powerpc64le
pseries VM with a modest .config:

                                  inclink       thinarc
sizes
vmlinux                        15 618 680    15 625 028
sum of all built-in.o          56 091 808     1 054 334
sum excluding root built-in.o                   151 430

find -name built-in.o | xargs rm ; time make vmlinux
real                              22.772s       21.143s
user                              13.280s       13.430s
sys                                4.310s        2.750s

- Final kernel pulled in only about 6K more, which shows how
  ineffective the object file culling is.
- Build performance looks improved due to less pagecache activity.
  On IO constrained systems it could be a bigger win.
- Build size saving is significant.

Side note, the toochain understands archives, so there's some tricks,
$ ar t built-in.o          # list all files you linked with
$ size built-in.o          # and their sizes
$ objdump -d built-in.o    # disassembly (unrelocated) with filenames

Implementation by sfr, minor tweaks by npiggin.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-09-09 10:31:19 +02:00
Jonathan Corbet 5219f18aaf docs: Special-case function-pointer parameters in kernel-doc
Add yet another regex to kernel-doc to trap @param() references separately
and not produce corrupt RST markup.

Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-09-06 08:02:49 -06:00
Jonathan Corbet ef00028b20 docs: make kernel-doc handle varargs properly
As far as I can tell, the handling of "..." arguments has never worked
right, so any documentation provided was ignored in favor of "variable
arguments."  This makes kernel-doc handle "@...:" as documented.  It does
*not* fix spots in kerneldoc comments that don't follow that convention,
but they are no more broken than before.

Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-09-06 08:02:19 -06:00
Linus Torvalds 56291b271b Merge branch 'rc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
Pull kbuild fix from Michal Marek:
 "Fix for 'make deb-pkg'.  The bug got introduced in v4.8-rc1"

* 'rc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
  builddeb: Skip gcc-plugins when not configured
2016-09-05 10:55:55 -07:00
Greg Kroah-Hartman fbc1ec2efe Merge 4.8-rc5 into char-misc-next
We want the fixes in here for merging and testing.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-09-05 08:04:07 +02:00
Joe Perches 7e93215990 treewide: remove references to the now unnecessary DEFINE_PCI_DEVICE_TABLE
It's been eliminated from the sources, remove it from everywhere else.

Link: http://lkml.kernel.org/r/076eff466fd7edb550c25c8b25d76924ca0eba62.1472660229.git.joe@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Cc: "James E.J. Bottomley" <jejb@linux.vnet.ibm.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Andy Whitcroft <apw@canonical.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-09-01 17:52:01 -07:00
Mauro Carvalho Chehab 82801d065b docs-rst: kernel-doc: fix typedef output in RST format
When using a typedef function like this one:
	typedef bool v4l2_check_dv_timings_fnc (const struct v4l2_dv_timings * t, void * handle);

The Sphinx C domain expects it to create a c:type: reference,
as that's the way it creates the type references when parsing
a c:function:: declaration.

So, a declaration like:

	.. c:function:: bool v4l2_valid_dv_timings (const struct v4l2_dv_timings * t, const struct v4l2_dv_timings_cap * cap, v4l2_check_dv_timings_fnc fnc, void * fnc_handle)

Will create a cross reference for :c:type:`v4l2_check_dv_timings_fnc`.

So, when outputting such typedefs in RST format, we need to handle
this special case, as otherwise it will produce those warnings:

	./include/media/v4l2-dv-timings.h:43: WARNING: c:type reference target not found: v4l2_check_dv_timings_fnc
	./include/media/v4l2-dv-timings.h:60: WARNING: c:type reference target not found: v4l2_check_dv_timings_fnc
	./include/media/v4l2-dv-timings.h:81: WARNING: c:type reference target not found: v4l2_check_dv_timings_fnc

So, change the kernel-doc script to produce a RST output for the
above typedef as:
	.. c:type:: v4l2_check_dv_timings_fnc

	   **Typedef**: timings check callback

	**Syntax**

	  ``bool v4l2_check_dv_timings_fnc (const struct v4l2_dv_timings * t, void * handle);``

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-09-01 08:10:07 -06:00
Mauro Carvalho Chehab d37c43ce19 docs-rst: improve typedef parser
Improve the parser to handle typedefs like:

	typedef bool v4l2_check_dv_timings_fnc(const struct v4l2_dv_timings *t, void *handle);

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-09-01 08:07:22 -06:00
Alexander Kapshuk 9b9e7d36bd ver_linux: rename ver_linux.awk to ver_linux
ver_linux.awk renamed to ver_linux.

Signed-off-by: Alexander Kapshuk <alexander.kapshuk@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-08-31 13:59:31 +02:00
Alexander Kapshuk b88396e417 ver_linux: shell implementation removed
The shell implementation removed. To be replaced with an all-awk implementation via consecutive patch.

Signed-off-by: Alexander Kapshuk <alexander.kapshuk@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-08-31 13:59:31 +02:00
Alexander Kapshuk 2d187d5855 ver_linux: complete awk implementation
The algorithm that extracts the version number of the utility being
queried, and prints the name of the utility and its version number is
currently implemented in awk. The code is used throughout the script,
making its use repetative. The proposed implementation confines the
algorithm in question to a function, which makes the script easier to
read overall, as well as considerably reduces the number of lines of
code. Every attempt has been made to retain the look and the format
generated by the current implementation.

Signed-off-by: Alexander Kapshuk <alexander.kapshuk@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-08-31 13:59:31 +02:00
Valentin Rothberg 2f9cc12bb3 checkkconfigsymbols: use arglist instead of cmd string
Splitting a command string could lead to unintended arguments.  Use an
argument list in the execute() function instead.

Signed-off-by: Valentin Rothberg <valentinrothberg@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-08-28 11:08:34 +02:00
Valentin Rothberg ef3f55438d checkkconfigsymblos: consistent symbol terminology
'symbol' and 'feature' are used synonymously to refer to Kconfig symbols
(configs, menus, etc.).  Use the term 'symbol' to have a consistent
terminology and to make the code more comprehensible.

Signed-off-by: Valentin Rothberg <valentinrothberg@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-08-28 11:08:34 +02:00
Valentin Rothberg 36c79c7fac checkkconfigsymbols.py: fix pylint and pep8 warnings
Fix pylint and pep8 warnings to have a consistent syntax and style.

Signed-off-by: Valentin Rothberg <valentinrothberg@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-08-28 11:08:34 +02:00
Valentin Rothberg 14390e3164 checkkconfigsymbols: use ArgumentParser
Replace the deprecated OptionParser with ArgumentParser, as recommended
by pylint.

Signed-off-by: Valentin Rothberg <valentinrothberg@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-08-28 11:08:34 +02:00
Valentin Rothberg 7c5227af25 checkkconfigsymbols.py: port to Python 3
Python 2 is slowly dying, so port the script to Python 3.

Signed-off-by: Valentin Rothberg <valentinrothberg@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-08-28 11:08:34 +02:00
Valentin Rothberg f175ba174e checkkconfigsymbols.py: avoid shell injection
Use subprocess and set shell to False to avoid potential shell
injections.

Reported-by: Bernd Dietzel <tcpip@t-online.de>
Signed-off-by: Valentin Rothberg <valentinrothberg@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-08-27 11:44:01 +02:00
Joe Perches 8582fb59f7 get_maintainer: quiet noisy implicit -f vcs_file_exists checking
Checking command line filenames that are outside the git tree can emit a
noisy and confusing message.

Quiet that message by redirecting stderr.
Verify that the command was executed successfully.

Fixes: 4cad35a7ca ("get_maintainer.pl: reduce need for command-line option -f")
Link: http://lkml.kernel.org/r/1970a1d2fecb258e384e2e4fdaacdc9ccf3e30a4.1470955439.git.joe@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Reported-by: Wolfram Sang <wsa@the-dreams.de>
Tested-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-08-26 17:39:34 -07:00
Michal Marek 5c6f3225d0 kbuild: Regenerate genksyms lexer
Update the lexer after 4fab91605a ("kbuild: genksyms fix for typeof
handling").

Signed-off-by: Michal Marek <mmarek@suse.com>
2016-08-25 20:03:51 +02:00
Nicholas Piggin 4fab91605a kbuild: genksyms fix for typeof handling
The tokenizer misses counting an open-parenthesis when parsing a
non-trivial typeof beginning with an open-parenthesis. This function
in include/linux/ceph/libceph.h

static type *lookup_##name(struct rb_root *root,
                           typeof(((type *)0)->keyfld) key)

When instantiated in net/ceph/mon_client.c, causes subsequent symbols
including an EXPORT_SYMBOL in that file to be lost.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-08-25 18:55:37 +02:00
Mauro Carvalho Chehab 6d232c8015 docs-rst: kernel-doc: better output struct members
Right now, for a struct, kernel-doc produces the following output:

	.. c:type:: struct v4l2_prio_state

	   stores the priority states

	**Definition**

	::

	  struct v4l2_prio_state {
	    atomic_t prios[4];
	  };

	**Members**

	``atomic_t prios[4]``
	  array with elements to store the array priorities

Putting a member name in verbatim and adding a continuation line
causes the LaTeX output to generate something like:
	item[atomic_t prios\[4\]] array with elements to store the array priorities

Everything inside "item" is non-breakable, with may produce
lines bigger than the column width.

Also, for function members, like:

        int (* rx_read) (struct v4l2_subdev *sd, u8 *buf, size_t count,ssize_t *num);

It puts the name of the member at the end, like:

        int (*) (struct v4l2_subdev *sd, u8 *buf, size_t count,ssize_t *num) read

With is very confusing.

The best is to highlight what really matters: the member name.
is a secondary information.

So, change kernel-doc, for it to produce the output on a different way:

	**Members**

	``prios[4]``

	  array with elements to store the array priorities

Also, as the type is not part of LaTeX "item[]", LaTeX will split it into
multiple lines, if needed.

So, both LaTeX/PDF and HTML outputs will look good.

It should be noticed, however, that the way Sphinx LaTeX output handles
things like:

	Foo
	   bar

is different than the HTML output. On HTML, it will produce something
like:

	**Foo**
	   bar

While, on LaTeX, it puts both foo and bar at the same line, like:

	**Foo** bar

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-24 15:24:36 -06:00
Alexey Dobriyan dee81e9886 fixdep: faster CONFIG_ search
Do you think kernel build is 100% dominated by gcc? You are wrong!
One small utility called "fixdep" consistently manages to sneak into
profile's first page (unless you have small monitor of course).

The choke point is this clever code:

	for (; m < end; m++) {
		if (*m == INT_CONF) { p = (char *) m  ; goto conf; }
		if (*m == INT_ONFI) { p = (char *) m-1; goto conf; }
		if (*m == INT_NFIG) { p = (char *) m-2; goto conf; }
		if (*m == INT_FIG_) { p = (char *) m-3; goto conf; }

4 branches per 4 characters is not fast.

Use strstr(3), so that SSE2 etc can be used.

With this patch, fixdep is so deep at the bottom, it is hard to find it.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-08-24 22:34:19 +02:00
Markus Heiser aa10a78266 doc-rst: Revert "kernel-doc: fix handling of address_space tags"
This reverts commit a88b1672d4.

From the origin comit log::

  The RST cpp:function handler is very pedantic: it doesn't allow any
  macros like __user on it

Since the kernel-doc parser does NOT make use of the cpp:domain, there
is no need to change the kernel-doc parser eleminating the address_space
tags.

Signed-off-by: Markus Heiser <markus.heiser@darmarIT.de>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-22 15:19:53 -06:00
Andrew Donnellan 4c73c0882b checkkconfigsymbols.py: add --no-color option, don't print color to non-TTY
Only print the ANSI colour escape codes if stdout is a TTY. Useful if
redirecting output to a file or piping to another script.

Also add a new option, --no-color, if the user wants to disable colour
output for whatever reason.

Signed-off-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Acked-by: Valentin Rothberg <valentinrothberg@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-08-18 18:12:07 +02:00
Kees Cook d3e2773c4e builddeb: Skip gcc-plugins when not configured
When attempting to build a Debian kernel package, the "scripts/gcc-plugins"
directory does not exist in the output tree unless CONFIG_GCC_PLUGINS=y.
To avoid errors when not defined, this wraps the failing "find" in a config
test.

Reported-by: Frank Paulsen <frobnic+lkml@gmail.com>
Tested-by: Christian Kujau <lists@nerdbynature.de>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-08-16 10:16:38 +02:00
Joe Perches aec742e8e1 get_maintainer: Don't check if STDIN exists in a VCS repository
If get_maintainer is not given any filename arguments on the command line,
the standard input is read for a patch.

But checking if a VCS has a file named &STDIN is not a good idea and fails.

Verify the nominal input file is not &STDIN before checking the VCS.

Fixes: 4cad35a7ca ("get_maintainer.pl: reduce need for command-line option -f")
Reported-by: Christopher Covington <cov@codeaurora.org>
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-08-10 10:42:00 -07:00
Emese Revfy caefd8c9a9 gcc-plugins: Add support for plugin subdirectories
This adds support for building more complex gcc plugins that live in a
subdirectory instead of just in a single source file.

Reported-by: PaX Team <pageexec@freemail.hu>
Signed-off-by: Emese Revfy <re.emese@gmail.com>
[kees: clarified commit message]
Signed-off-by: Kees Cook <keescook@chromium.org>
2016-08-08 17:53:05 -07:00
Emese Revfy 7040c83bfb gcc-plugins: Automate make rule generation
There's no reason to repeat the same names in the Makefile when the .so
files have already been listed. The .o list can be generated from them.

Reported-by: PaX Team <pageexec@freemail.hu>
Signed-off-by: Emese Revfy <re.emese@gmail.com>
[kees: clarified commit message]
Signed-off-by: Kees Cook <keescook@chromium.org>
2016-08-08 17:52:20 -07:00
Emese Revfy 65d59ec8ad gcc-plugins: Add support for passing plugin arguments
The latent_entropy plugin needs to pass arguments, so this adds the
support.

Signed-off-by: Emese Revfy <re.emese@gmail.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
2016-08-08 17:49:05 -07:00
Kees Cook ed58c0e9ee gcc-plugins: abort builds cleanly when not supported
When the compiler doesn't support gcc plugins (either due to missing
headers or too old a version), report the problem and abort the build
instead of emitting a warning and letting the build founder with arcane
compiler errors.

Signed-off-by: Kees Cook <keescook@chromium.org>
2016-08-08 17:49:05 -07:00
Emese Revfy d26e941492 kbuild: no gcc-plugins during cc-option tests
The gcc-plugins arguments should not be included when performing
cc-option tests.

Steps to reproduce:
1) make mrproper
2) make defconfig
3) enable GCC_PLUGINS, GCC_PLUGIN_CYC_COMPLEXITY
4) enable FUNCTION_TRACER (it will select other options as well)
5) make && make modules

Build errors:
MODPOST 18 modules
ERROR: "__fentry__" [net/netfilter/xt_nat.ko] undefined!
ERROR: "__fentry__" [net/netfilter/xt_mark.ko] undefined!
ERROR: "__fentry__" [net/netfilter/xt_addrtype.ko] undefined!
ERROR: "__fentry__" [net/netfilter/xt_LOG.ko] undefined!
ERROR: "__fentry__" [net/netfilter/nf_nat_sip.ko] undefined!
ERROR: "__fentry__" [net/netfilter/nf_nat_irc.ko] undefined!
ERROR: "__fentry__" [net/netfilter/nf_nat_ftp.ko] undefined!
ERROR: "__fentry__" [net/netfilter/nf_nat.ko] undefined!

Reported-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Emese Revfy <re.emese@gmail.com>
[kees: renamed variable, clarified commit message]
Signed-off-by: Kees Cook <keescook@chromium.org>
2016-08-08 17:49:05 -07:00
Al Viro 7f2084fa55 [kbuild] handle exports in lib-y objects reliably
Collect the symbols exported by anything that goes into lib.a and
add an empty object (lib-exports.o) with explicit undefs for each
of those to obj-y.

That allows to relax the rules regarding the use of exports in
lib-* objects - right now an object with export can be in lib-*
only if we are guaranteed that there always will be users in
built-in parts of the tree, otherwise it needs to be in obj-*.
As the result, we have an unholy mix of lib- and obj- in lib/Makefile
and (especially) in arch/*/lib/Makefile.  Moreover, a change in
generic part of the kernel can lead to mysteriously missing exports
on some configs.  With this change we don't have to worry about
that anymore.

One side effect is that built-in.o now pulls everything with exports
from the corresponding lib.a (if such exists).  That's exactly what
we want for linking vmlinux and fortunately it's almost the only thing
built-in.o is used in.  arch/ia64/hp/sim/boot/bootloader is the only
exception and it's easy to get rid of now - just turn everything in
arch/ia64/lib into lib-* and don't bother with arch/ia64/lib/built-in.o
anymore.

[AV: stylistic fix from Michal folded in]

Acked-by: Michal Marek <mmarek@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-08-07 23:46:30 -04:00
Linus Torvalds bf0f500bd0 A few updates and fixes:
. Move the suppressing of the __builtin_return_address >0 warning to the
    tracing directory only.
 
  . metag recordmcount fix for newer glibc's
 
  . Two tracing histogram fixes that were reported by KASAN
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Merge tag 'trace-v4.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull tracing fixes from Steven Rostedt:
 "A few updates and fixes:

   - move the suppressing of the __builtin_return_address >0 warning to
     the tracing directory only.

   - metag recordmcount fix for newer glibc's

   - two tracing histogram fixes that were reported by KASAN"

* tag 'trace-v4.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing: Fix use-after-free in hist_register_trigger()
  tracing: Fix use-after-free in hist_unreg_all/hist_enable_unreg_all
  Makefile: Mute warning for __builtin_return_address(>0) for tracing only
  ftrace/recordmcount: Work around for addition of metag magic but not relocations
2016-08-03 12:50:06 -04:00
Linus Torvalds d52bd54db8 Merge branch 'akpm' (patches from Andrew)
Merge yet more updates from Andrew Morton:

 - the rest of ocfs2

 - various hotfixes, mainly MM

 - quite a bit of misc stuff - drivers, fork, exec, signals, etc.

 - printk updates

 - firmware

 - checkpatch

 - nilfs2

 - more kexec stuff than usual

 - rapidio updates

 - w1 things

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (111 commits)
  ipc: delete "nr_ipc_ns"
  kcov: allow more fine-grained coverage instrumentation
  init/Kconfig: add clarification for out-of-tree modules
  config: add android config fragments
  init/Kconfig: ban CONFIG_LOCALVERSION_AUTO with allmodconfig
  relay: add global mode support for buffer-only channels
  init: allow blacklisting of module_init functions
  w1:omap_hdq: fix regression
  w1: add helper macro module_w1_family
  w1: remove need for ida and use PLATFORM_DEVID_AUTO
  rapidio/switches: add driver for IDT gen3 switches
  powerpc/fsl_rio: apply changes for RIO spec rev 3
  rapidio: modify for rev.3 specification changes
  rapidio: change inbound window size type to u64
  rapidio/idt_gen2: fix locking warning
  rapidio: fix error handling in mbox request/release functions
  rapidio/tsi721_dma: advance queue processing from transfer submit call
  rapidio/tsi721: add messaging mbox selector parameter
  rapidio/tsi721: add PCIe MRRS override parameter
  rapidio/tsi721_dma: add channel mask and queue size parameters
  ...
2016-08-02 21:08:07 -04:00
Vegard Nossum a4691deabf kcov: allow more fine-grained coverage instrumentation
For more targeted fuzzing, it's better to disable kernel-wide
instrumentation and instead enable it on a per-subsystem basis.  This
follows the pattern of UBSAN and allows you to compile in the kcov
driver without instrumenting the whole kernel.

To instrument a part of the kernel, you can use either

    # for a single file in the current directory
    KCOV_INSTRUMENT_filename.o := y

or

    # for all the files in the current directory (excluding subdirectories)
    KCOV_INSTRUMENT := y

or

    # (same as above)
    ccflags-y += $(CFLAGS_KCOV)

or

    # for all the files in the current directory (including subdirectories)
    subdir-ccflags-y += $(CFLAGS_KCOV)

Link: http://lkml.kernel.org/r/1464008380-11405-1-git-send-email-vegard.nossum@oracle.com
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-08-02 19:35:43 -04:00
Allen Hubbe 45107ff6d5 checkpatch: if no filenames then read stdin
If no filenames are given, then read the patch from stdin.

Link: http://lkml.kernel.org/r/a8784f291ccb5067361992bf5d41ff6cfb0ce5cb.1469830917.git.allenbh@gmail.com
Signed-off-by: Allen Hubbe <allenbh@gmail.com>
Acked-by: Joe Perches <joe@perches.com>
Cc: Andy Whitcroft <apw@canonical.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-08-02 19:35:13 -04:00
Allen Hubbe ed43c4e58a checkpatch: check signoff when reading stdin
Signoff was not checked if the filename is '-', indicating reading the
patch from stdin.  Commands such as the below would not warn about a
missing signoff, because the patch filename is '-'.  This change allows
checkpatch to warn about a missing signoff, even if the input filename
is '-', but only if the patch has a commit message.

  git show --pretty=email | scripts/checkpatch.pl -

A more common use of checkpatch with stdin is for piping git diff
through checkpatch.  The diff output would not contain a commit message,
and therefore it would not contain a signoff line.  For this common use
case, a warning should not be printed about the missing signoff.  With
this change we will only warn about a missing signoff if the input
contains a commit message.

  git diff | scripts/checkpatch.pl -

Before this patch, a workaround for the first command was to refer to
stdin by a name other than '-'.  The workaround is not an elegant
solution, because elsewhere checkpatch uses the fact that filename
equals '-', such as in setting '$vname' to 'Your patch' for stdin.  The
command below would report "/dev/stdin has style problems" instead of
"Your patch has style problems."

  git show --pretty=email | scripts/checkpatch.pl /dev/stdin

Link: http://lkml.kernel.org/r/48be31e414bddc65bccfa6b1322359be9ba032eb.1469670589.git.allenbh@gmail.com
Signed-off-by: Allen Hubbe <allenbh@gmail.com>
Acked-by: Joe Perches <joe@perches.com>
Cc: Andy Whitcroft <apw@canonical.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-08-02 19:35:13 -04:00
Joe Perches c844711575 checkpatch: improve 'bare use of' signed/unsigned types warning
Fix false positive warning of identifiers ending in signed with an =
assignment of WARNING: Prefer 'signed int' to bare use of 'signed'.

Link: http://lkml.kernel.org/r/6a0e24c3e9102337528ecfcbbe91a0eb5b4820ed.1469529497.git.joe@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Reported-by: Alan Douglas <alanjhd@gmail.com>
Acked-by: Andy Whitcroft <apw@canonical.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-08-02 19:35:12 -04:00
Tomas Winkler cec3aaa566 checkpatch: don't complain about BIT macro in uapi
BIT macro cannot be exported to UAPI, don't complain about it.

Link: http://lkml.kernel.org/r/1468707033-16173-1-git-send-email-tomas.winkler@intel.com
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Acked-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-08-02 19:35:12 -04:00
Joe Perches aab38f516a checkpatch: yet another commit id improvement
Using \b isn't good enough to isolate what appears to be a commit id in
a commit message.

Make sure there is a space or a quote like character after a continuous
run of hexadecimal characters that could be a commit id.

Link: http://lkml.kernel.org/r/fdd22b47463a21c21132edbb8aa35e372950a1e6.1468869915.git.joe@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Cc: "Zhuo, Qiuxu" <qiuxu.zhuo@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-08-02 19:35:11 -04:00
Joe Perches dadf680de3 checkpatch: allow c99 style // comments
Sanitise the lines that contain c99 comments so that the error doesn't
get emitted.

Link: http://lkml.kernel.org/r/d4d22c34ad7bcc1bceb52f0742f76b7a6d585235.1468368420.git.joe@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-08-02 19:35:11 -04:00
Joe Perches d560a5f8a4 checkpatch: skip long lines that use an EFI_GUID macro
These are also possible single line uses that exceed the generic maximum
line length (typically 80 columns)

Link: http://lkml.kernel.org/r/32a6a85fbd6161f1bb55ce176a464e44591afc5b.1468368420.git.joe@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-08-02 19:35:10 -04:00
Joe Perches 4cad35a7ca get_maintainer.pl: reduce need for command-line option -f
If a vcs is used, look to see if the vcs tracks the file specified and
so the -f option becomes optional.

Link: http://lkml.kernel.org/r/7c86a8df0d48770c45778a43b6b3e4627b2a90ee.1469746395.git.joe@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-08-02 19:35:07 -04:00
Linus Torvalds 44cee85a88 Merge branch 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
Pull misc kbuild updates from Michal Marek:

 - coccicheck script improvements by Luis Rodriguez and Deepa Dinamani

 - new coccinelle patches by Yann Droneaud and Vaishali Thakkar

 - debian packaging fixes by Wilfried Klaebe, Henning Schild and Marcin
   Mielniczuk

* 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
  Fix the Debian packaging script on systems with no codename
  builddeb: fix file permissions before packaging
  scripts/coccinelle: require coccinelle >= 1.0.4 on device_node_continue.cocci
  coccicheck: refer to Documentation/coccinelle.txt and wiki
  coccicheck: add support for requring a coccinelle version
  scripts: add Linux .cocciconfig for coccinelle
  coccicheck: replace --very-quiet with --quiet when debugging
  coccicheck: add support for DEBUG_FILE
  coccicheck: enable parmap support
  coccicheck: make SPFLAGS more useful
  coccicheck: move spatch binary check up
  builddeb: really include objtool binary in headers package
  coccinelle: catch krealloc() on devm_*() allocated memory
  coccinelle: recognize more devm_* memory allocation functions
  coccinelle: also catch kzfree() issues
  coccicheck: Allow for overriding spatch flags
  Coccinelle: noderef: Add new rules and correct the old rule
2016-08-02 16:48:52 -04:00
Linus Torvalds f716a85cd6 Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
Pull kbuild updates from Michal Marek:

 - GCC plugin support by Emese Revfy from grsecurity, with a fixup from
   Kees Cook.  The plugins are meant to be used for static analysis of
   the kernel code.  Two plugins are provided already.

 - reduction of the gcc commandline by Arnd Bergmann.

 - IS_ENABLED / IS_REACHABLE macro enhancements by Masahiro Yamada

 - bin2c fix by Michael Tautschnig

 - setlocalversion fix by Wolfram Sang

* 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
  gcc-plugins: disable under COMPILE_TEST
  kbuild: Abort build on bad stack protector flag
  scripts: Fix size mismatch of kexec_purgatory_size
  kbuild: make samples depend on headers_install
  Kbuild: don't add obj tree in additional includes
  Kbuild: arch: look for generated headers in obtree
  Kbuild: always prefix objtree in LINUXINCLUDE
  Kbuild: avoid duplicate include path
  Kbuild: don't add ../../ to include path
  vmlinux.lds.h: replace config_enabled() with IS_ENABLED()
  kconfig.h: allow to use IS_{ENABLE,REACHABLE} in macro expansion
  kconfig.h: use already defined macros for IS_REACHABLE() define
  export.h: use __is_defined() to check if __KSYM_* is defined
  kconfig.h: use __is_defined() to check if MODULE is defined
  kbuild: setlocalversion: print error to STDERR
  Add sancov plugin
  Add Cyclomatic complexity GCC plugin
  GCC plugin infrastructure
  Shared library support
2016-08-02 16:37:12 -04:00
Laura Abbott b2e1c26f0b ftrace/recordmcount: Work around for addition of metag magic but not relocations
glibc recently did a sync up (94e73c95d9b5 "elf.h: Sync with the gabi
webpage") that added a #define for EM_METAG but did not add relocations

This triggers build errors:

scripts/recordmcount.c: In function 'do_file':
scripts/recordmcount.c:466:28: error: 'R_METAG_ADDR32' undeclared (first use in this function)
  case EM_METAG:  reltype = R_METAG_ADDR32;
                            ^~~~~~~~~~~~~~
scripts/recordmcount.c:466:28: note: each undeclared identifier is reported only once for each function it appears in
scripts/recordmcount.c:468:20: error: 'R_METAG_NONE' undeclared (first use in this function)
     rel_type_nop = R_METAG_NONE;
                    ^~~~~~~~~~~~

Work around this change with some more #ifdefery for the relocations.

Fedora Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1354034

Link: http://lkml.kernel.org/r/1468005530-14757-1-git-send-email-labbott@redhat.com

Cc: stable@vger.kernel.org # v3.9+
Cc: James Hogan <james.hogan@imgtec.com>
Fixes: 00512bdd45 ("metag: ftrace support")
Reported-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2016-08-02 12:57:24 -04:00
Linus Torvalds f64d6e2aaa DeviceTree update for 4.8:
- Removal of most of_platform_populate() calls in arch code. Now the DT
 core code calls it in the default case and platforms only need to call
 it if they have special needs.
 
 - Use pr_fmt on all the DT core print statements.
 
 - CoreSight binding doc improvements to block name descriptions.
 
 - Add dt_to_config script which can parse dts files and list
 corresponding kernel config options.
 
 - Fix memory leak hit with a PowerMac DT.
 
 - Correct a bunch of STMicro compatible strings to use the correct
 vendor prefix.
 
 - Fix DA9052 PMIC binding doc to match what is actually used in dts
 files.
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Merge tag 'devicetree-for-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux

Pull DeviceTree updates from Rob Herring:

 - remove most of_platform_populate() calls in arch code.  Now the DT
   core code calls it in the default case and platforms only need to
   call it if they have special needs

 - use pr_fmt on all the DT core print statements

 - CoreSight binding doc improvements to block name descriptions

 - add dt_to_config script which can parse dts files and list
   corresponding kernel config options

 - fix memory leak hit with a PowerMac DT

 - correct a bunch of STMicro compatible strings to use the correct
   vendor prefix

 - fix DA9052 PMIC binding doc to match what is actually used in dts
   files

* tag 'devicetree-for-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (35 commits)
  documentation: da9052: Update regulator bindings names to match DA9052/53 DTS expectations
  xtensa: Partially Revert "xtensa: Remove unnecessary of_platform_populate with default match table"
  xtensa: Fix build error due to missing include file
  MIPS: ath79: Add missing include file
  Fix spelling errors in Documentation/devicetree
  ARM: dts: fix STMicroelectronics compatible strings
  powerpc/dts: fix STMicroelectronics compatible strings
  Documentation: dt: i2c: use correct STMicroelectronics vendor prefix
  scripts/dtc: dt_to_config - kernel config options for a devicetree
  of: fdt: mark unflattened tree as detached
  of: overlay: add resolver error prints
  coresight: document binding acronyms
  Documentation/devicetree: document cavium-pip rx-delay/tx-delay properties
  of: use pr_fmt prefix for all console printing
  of/irq: Mark initialised interrupt controllers as populated
  of: fix memory leak related to safe_name()
  Revert "of/platform: export of_default_bus_match_table"
  of: unittest: use of_platform_default_populate() to populate default bus
  memory: omap-gpmc: use of_platform_default_populate() to populate default bus
  bus: uniphier-system-bus: use of_platform_default_populate() to populate default bus
  ...
2016-07-30 11:32:01 -07:00
Linus Torvalds 7a1e8b80fb Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
Pull security subsystem updates from James Morris:
 "Highlights:

   - TPM core and driver updates/fixes
   - IPv6 security labeling (CALIPSO)
   - Lots of Apparmor fixes
   - Seccomp: remove 2-phase API, close hole where ptrace can change
     syscall #"

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (156 commits)
  apparmor: fix SECURITY_APPARMOR_HASH_DEFAULT parameter handling
  tpm: Add TPM 2.0 support to the Nuvoton i2c driver (NPCT6xx family)
  tpm: Factor out common startup code
  tpm: use devm_add_action_or_reset
  tpm2_i2c_nuvoton: add irq validity check
  tpm: read burstcount from TPM_STS in one 32-bit transaction
  tpm: fix byte-order for the value read by tpm2_get_tpm_pt
  tpm_tis_core: convert max timeouts from msec to jiffies
  apparmor: fix arg_size computation for when setprocattr is null terminated
  apparmor: fix oops, validate buffer size in apparmor_setprocattr()
  apparmor: do not expose kernel stack
  apparmor: fix module parameters can be changed after policy is locked
  apparmor: fix oops in profile_unpack() when policy_db is not present
  apparmor: don't check for vmalloc_addr if kvzalloc() failed
  apparmor: add missing id bounds check on dfa verification
  apparmor: allow SYS_CAP_RESOURCE to be sufficient to prlimit another task
  apparmor: use list_next_entry instead of list_entry_next
  apparmor: fix refcount race when finding a child profile
  apparmor: fix ref count leak when profile sha1 hash is read
  apparmor: check that xindex is in trans_table bounds
  ...
2016-07-29 17:38:46 -07:00
Linus Torvalds f0c98ebc57 libnvdimm for 4.8
1/ Replace pcommit with ADR / directed-flushing:
    The pcommit instruction, which has not shipped on any product, is
    deprecated. Instead, the requirement is that platforms implement either
    ADR, or provide one or more flush addresses per nvdimm. ADR
    (Asynchronous DRAM Refresh) flushes data in posted write buffers to the
    memory controller on a power-fail event. Flush addresses are defined in
    ACPI 6.x as an NVDIMM Firmware Interface Table (NFIT) sub-structure:
    "Flush Hint Address Structure". A flush hint is an mmio address that
    when written and fenced assures that all previous posted writes
    targeting a given dimm have been flushed to media.
 
 2/ On-demand ARS (address range scrub):
    Linux uses the results of the ACPI ARS commands to track bad blocks
    in pmem devices.  When latent errors are detected we re-scrub the media
    to refresh the bad block list, userspace can also request a re-scrub at
    any time.
 
 3/ Support for the Microsoft DSM (device specific method) command format.
 
 4/ Support for EDK2/OVMF virtual disk device memory ranges.
 
 5/ Various fixes and cleanups across the subsystem.
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Merge tag 'libnvdimm-for-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm

Pull libnvdimm updates from Dan Williams:

 - Replace pcommit with ADR / directed-flushing.

   The pcommit instruction, which has not shipped on any product, is
   deprecated.  Instead, the requirement is that platforms implement
   either ADR, or provide one or more flush addresses per nvdimm.

   ADR (Asynchronous DRAM Refresh) flushes data in posted write buffers
   to the memory controller on a power-fail event.

   Flush addresses are defined in ACPI 6.x as an NVDIMM Firmware
   Interface Table (NFIT) sub-structure: "Flush Hint Address Structure".
   A flush hint is an mmio address that when written and fenced assures
   that all previous posted writes targeting a given dimm have been
   flushed to media.

 - On-demand ARS (address range scrub).

   Linux uses the results of the ACPI ARS commands to track bad blocks
   in pmem devices.  When latent errors are detected we re-scrub the
   media to refresh the bad block list, userspace can also request a
   re-scrub at any time.

 - Support for the Microsoft DSM (device specific method) command
   format.

 - Support for EDK2/OVMF virtual disk device memory ranges.

 - Various fixes and cleanups across the subsystem.

* tag 'libnvdimm-for-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: (41 commits)
  libnvdimm-btt: Delete an unnecessary check before the function call "__nd_device_register"
  nfit: do an ARS scrub on hitting a latent media error
  nfit: move to nfit/ sub-directory
  nfit, libnvdimm: allow an ARS scrub to be triggered on demand
  libnvdimm: register nvdimm_bus devices with an nd_bus driver
  pmem: clarify a debug print in pmem_clear_poison
  x86/insn: remove pcommit
  Revert "KVM: x86: add pcommit support"
  nfit, tools/testing/nvdimm/: unify shutdown paths
  libnvdimm: move ->module to struct nvdimm_bus_descriptor
  nfit: cleanup acpi_nfit_init calling convention
  nfit: fix _FIT evaluation memory leak + use after free
  tools/testing/nvdimm: add manufacturing_{date|location} dimm properties
  tools/testing/nvdimm: add virtual ramdisk range
  acpi, nfit: treat virtual ramdisk SPA as pmem region
  pmem: kill __pmem address space
  pmem: kill wmb_pmem()
  libnvdimm, pmem: use nvdimm_flush() for namespace I/O writes
  fs/dax: remove wmb_pmem()
  libnvdimm, pmem: flush posted-write queues on shutdown
  ...
2016-07-28 17:38:16 -07:00
Linus Torvalds ff9a082fda media updates for v4.8-rc1
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Merge tag 'media/v4.8-4' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media

Pull media documentation updates from Mauro Carvalho Chehab:
 "This patch series does the conversion of all media documentation stuff
  to Restrutured Text markup format and add them to the
  Documentation/index.rst file.

  The media documentation was grouped into 4 books:

    - media uAPI
    - media kAPI
    - V4L driver-specific documentation
    - DVB driver-specific documentation

  It also contains several documentation improvements and one fixup
  patch for a core issue with cropcap.

  PS.  After this patch series, the media DocBook is deprecated and
  should be removed.  I'll add such patch on a future pull request"

* tag 'media/v4.8-4' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (322 commits)
  [media] cx23885-cardlist.rst: add a new card
  [media] doc-rst: add some needed escape codes
  [media] doc-rst: kapi: use :c:func: instead of :cpp:func
  doc-rst: kernel-doc: fix a change introduced by mistake
  [media] v4l2-ioctl.h add debug info for struct v4l2_ioctl_ops
  [media] dvb_ringbuffer.h: some documentation improvements
  [media] v4l2-ctrls.h: fully document the header file
  [media] doc-rst: Fix some typedef ugly warnings
  [media] doc-rst: reorganize the kAPI v4l2 chapters
  [media] rename v4l2-framework.rst to v4l2-intro.rst
  [media] move V4L2 clocks to a separate .rst file
  [media] v4l2-fh.rst: add cross references and markups
  [media] v4l2-fh.rst: add fh contents from v4l2-framework.rst
  [media] v4l2-fh.h: add documentation for it
  [media] v4l2-event.rst: add cross-references and markups
  [media] v4l2-event.h: document all functions
  [media] v4l2-event.rst: add text from v4l2-framework.rst
  [media] v4l2-framework.rst: remove videobuf quick chapter
  [media] v4l2-dev: add cross-references and improve markup
  [media] doc-rst: move v4l2-dev doc to a separate file
  ...
2016-07-27 14:58:31 -07:00
Linus Torvalds 6e8d666e92 Disable "maybe-uninitialized" warning globally
Several build configurations had already disabled this warning because
it generates a lot of false positives.  But some had not, and it was
still enabled for "allmodconfig" builds, for example.

Looking at the warnings produced, every single one I looked at was a
false positive, and the warnings are frequent enough (and big enough)
that they can easily hide real problems that you don't notice in the
noise generated by -Wmaybe-uninitialized.

The warning is good in theory, but this is a classic case of a warning
that causes more problems than the warning can solve.

If gcc gets better at avoiding false positives, we may be able to
re-enable this warning.  But as is, we're better off without it, and I
want to be able to see the *real* warnings.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-07-27 13:17:41 -07:00
Mauro Carvalho Chehab 85538b1ad1 Merge branch 'topic/docs-next' into v4l_for_linus
* topic/docs-next: (322 commits)
  [media] cx23885-cardlist.rst: add a new card
  [media] doc-rst: add some needed escape codes
  [media] doc-rst: kapi: use :c:func: instead of :cpp:func
  doc-rst: kernel-doc: fix a change introduced by mistake
  [media] v4l2-ioctl.h add debug info for struct v4l2_ioctl_ops
  [media] dvb_ringbuffer.h: some documentation improvements
  [media] v4l2-ctrls.h: fully document the header file
  [media] doc-rst: Fix some typedef ugly warnings
  [media] doc-rst: reorganize the kAPI v4l2 chapters
  [media] rename v4l2-framework.rst to v4l2-intro.rst
  [media] move V4L2 clocks to a separate .rst file
  [media] v4l2-fh.rst: add cross references and markups
  [media] v4l2-fh.rst: add fh contents from v4l2-framework.rst
  [media] v4l2-fh.h: add documentation for it
  [media] v4l2-event.rst: add cross-references and markups
  [media] v4l2-event.h: document all functions
  [media] v4l2-event.rst: add text from v4l2-framework.rst
  [media] v4l2-framework.rst: remove videobuf quick chapter
  [media] v4l2-dev: add cross-references and improve markup
  [media] doc-rst: move v4l2-dev doc to a separate file
  ...
2016-07-27 10:45:04 -03:00
Linus Torvalds 0e06f5c0de Merge branch 'akpm' (patches from Andrew)
Merge updates from Andrew Morton:

 - a few misc bits

 - ocfs2

 - most(?) of MM

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (125 commits)
  thp: fix comments of __pmd_trans_huge_lock()
  cgroup: remove unnecessary 0 check from css_from_id()
  cgroup: fix idr leak for the first cgroup root
  mm: memcontrol: fix documentation for compound parameter
  mm: memcontrol: remove BUG_ON in uncharge_list
  mm: fix build warnings in <linux/compaction.h>
  mm, thp: convert from optimistic swapin collapsing to conservative
  mm, thp: fix comment inconsistency for swapin readahead functions
  thp: update Documentation/{vm/transhuge,filesystems/proc}.txt
  shmem: split huge pages beyond i_size under memory pressure
  thp: introduce CONFIG_TRANSPARENT_HUGE_PAGECACHE
  khugepaged: add support of collapse for tmpfs/shmem pages
  shmem: make shmem_inode_info::lock irq-safe
  khugepaged: move up_read(mmap_sem) out of khugepaged_alloc_page()
  thp: extract khugepaged from mm/huge_memory.c
  shmem, thp: respect MADV_{NO,}HUGEPAGE for file mappings
  shmem: add huge pages support
  shmem: get_unmapped_area align huge page
  shmem: prepare huge= mount option and sysfs knob
  mm, rmap: account shmem thp pages
  ...
2016-07-26 19:55:54 -07:00
Linus Torvalds 6453dbdda3 Power management material for v4.8-rc1
- Rework the cpufreq governor interface to make it more straightforward
    and modify the conservative governor to avoid using transition
    notifications (Rafael Wysocki).
 
  - Rework the handling of frequency tables by the cpufreq core to make
    it more efficient (Viresh Kumar).
 
  - Modify the schedutil governor to reduce the number of wakeups it
    causes to occur in cases when the CPU frequency doesn't need to be
    changed (Steve Muckle, Viresh Kumar).
 
  - Fix some minor issues and clean up code in the cpufreq core and
    governors (Rafael Wysocki, Viresh Kumar).
 
  - Add Intel Broxton support to the intel_pstate driver (Srinivas
    Pandruvada).
 
  - Fix problems related to the config TDP feature and to the validity
    of the MSR_HWP_INTERRUPT register in intel_pstate (Jan Kiszka,
    Srinivas Pandruvada).
 
  - Make intel_pstate update the cpu_frequency tracepoint even if
    the frequency doesn't change to avoid confusing powertop (Rafael
    Wysocki).
 
  - Clean up the usage of __init/__initdata in intel_pstate, mark some
    of its internal variables as __read_mostly and drop an unused
    structure element from it (Jisheng Zhang, Carsten Emde).
 
  - Clean up the usage of some duplicate MSR symbols in intel_pstate
    and turbostat (Srinivas Pandruvada).
 
  - Update/fix the powernv, s3c24xx and mvebu cpufreq drivers (Akshay
    Adiga, Viresh Kumar, Ben Dooks).
 
  - Fix a regression (introduced during the 4.5 cycle) in the
    pcc-cpufreq driver by reverting the problematic commit (Andreas
    Herrmann).
 
  - Add support for Intel Denverton to intel_idle, clean up Broxton
    support in it and make it explicitly non-modular (Jacob Pan,
    Jan Beulich, Paul Gortmaker).
 
  - Add support for Denverton and Ivy Bridge server to the Intel RAPL
    power capping driver and make it more careful about the handing
    of MSRs that may not be present (Jacob Pan, Xiaolong Wang).
 
  - Fix resume from hibernation on x86-64 by making the CPU offline
    during resume avoid using MONITOR/MWAIT in the "play dead" loop
    which may lead to an inadvertent "revival" of a "dead" CPU and
    a page fault leading to a kernel crash from it (Rafael Wysocki).
 
  - Make memory management during resume from hibernation more
    straightforward (Rafael Wysocki).
 
  - Add debug features that should help to detect problems related
    to hibernation and resume from it (Rafael Wysocki, Chen Yu).
 
  - Clean up hibernation core somewhat (Rafael Wysocki).
 
  - Prevent KASAN from instrumenting the hibernation core which leads
    to large numbers of false-positives from it (James Morse).
 
  - Prevent PM (hibernate and suspend) notifiers from being called
    during the cleanup phase if they have not been called during the
    corresponding preparation phase which is possible if one of the
    other notifiers returns an error at that time (Lianwei Wang).
 
  - Improve suspend-related debug printout in the tasks freezer and
    clean up suspend-related console handling (Roger Lu, Borislav
    Petkov).
 
  - Update the AnalyzeSuspend script in the kernel sources to
    version 4.2 (Todd Brandt).
 
  - Modify the generic power domains framework to make it handle
    system suspend/resume better (Ulf Hansson).
 
  - Make the runtime PM framework avoid resuming devices synchronously
    when user space changes the runtime PM settings for them and
    improve its error reporting (Rafael Wysocki, Linus Walleij).
 
  - Fix error paths in devfreq drivers (exynos, exynos-ppmu, exynos-bus)
    and in the core, make some devfreq code explicitly non-modular and
    change some of it into tristate (Bartlomiej Zolnierkiewicz,
    Peter Chen, Paul Gortmaker).
 
  - Add DT support to the generic PM clocks management code and make
    it export some more symbols (Jon Hunter, Paul Gortmaker).
 
  - Make the PCI PM core code slightly more robust against possible
    driver errors (Andy Shevchenko).
 
  - Make it possible to change DESTDIR and PREFIX in turbostat
    (Andy Shevchenko).
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Merge tag 'pm-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management updates from Rafael  Wysocki:
 "Again, the majority of changes go into the cpufreq subsystem, but
  there are no big features this time.  The cpufreq changes that stand
  out somewhat are the governor interface rework and improvements
  related to the handling of frequency tables.  Apart from those, there
  are fixes and new device/CPU IDs in drivers, cleanups and an
  improvement of the new schedutil governor.

  Next, there are some changes in the hibernation core, including a fix
  for a nasty problem related to the MONITOR/MWAIT usage by CPU offline
  during resume from hibernation, a few core improvements related to
  memory management during resume, a couple of additional debug features
  and cleanups.

  Finally, we have some fixes and cleanups in the devfreq subsystem,
  generic power domains framework improvements related to system
  suspend/resume, support for some new chips in intel_idle and in the
  power capping RAPL driver, a new version of the AnalyzeSuspend utility
  and some assorted fixes and cleanups.

  Specifics:

   - Rework the cpufreq governor interface to make it more
     straightforward and modify the conservative governor to avoid using
     transition notifications (Rafael Wysocki).

   - Rework the handling of frequency tables by the cpufreq core to make
     it more efficient (Viresh Kumar).

   - Modify the schedutil governor to reduce the number of wakeups it
     causes to occur in cases when the CPU frequency doesn't need to be
     changed (Steve Muckle, Viresh Kumar).

   - Fix some minor issues and clean up code in the cpufreq core and
     governors (Rafael Wysocki, Viresh Kumar).

   - Add Intel Broxton support to the intel_pstate driver (Srinivas
     Pandruvada).

   - Fix problems related to the config TDP feature and to the validity
     of the MSR_HWP_INTERRUPT register in intel_pstate (Jan Kiszka,
     Srinivas Pandruvada).

   - Make intel_pstate update the cpu_frequency tracepoint even if the
     frequency doesn't change to avoid confusing powertop (Rafael
     Wysocki).

   - Clean up the usage of __init/__initdata in intel_pstate, mark some
     of its internal variables as __read_mostly and drop an unused
     structure element from it (Jisheng Zhang, Carsten Emde).

   - Clean up the usage of some duplicate MSR symbols in intel_pstate
     and turbostat (Srinivas Pandruvada).

   - Update/fix the powernv, s3c24xx and mvebu cpufreq drivers (Akshay
     Adiga, Viresh Kumar, Ben Dooks).

   - Fix a regression (introduced during the 4.5 cycle) in the
     pcc-cpufreq driver by reverting the problematic commit (Andreas
     Herrmann).

   - Add support for Intel Denverton to intel_idle, clean up Broxton
     support in it and make it explicitly non-modular (Jacob Pan, Jan
     Beulich, Paul Gortmaker).

   - Add support for Denverton and Ivy Bridge server to the Intel RAPL
     power capping driver and make it more careful about the handing of
     MSRs that may not be present (Jacob Pan, Xiaolong Wang).

   - Fix resume from hibernation on x86-64 by making the CPU offline
     during resume avoid using MONITOR/MWAIT in the "play dead" loop
     which may lead to an inadvertent "revival" of a "dead" CPU and a
     page fault leading to a kernel crash from it (Rafael Wysocki).

   - Make memory management during resume from hibernation more
     straightforward (Rafael Wysocki).

   - Add debug features that should help to detect problems related to
     hibernation and resume from it (Rafael Wysocki, Chen Yu).

   - Clean up hibernation core somewhat (Rafael Wysocki).

   - Prevent KASAN from instrumenting the hibernation core which leads
     to large numbers of false-positives from it (James Morse).

   - Prevent PM (hibernate and suspend) notifiers from being called
     during the cleanup phase if they have not been called during the
     corresponding preparation phase which is possible if one of the
     other notifiers returns an error at that time (Lianwei Wang).

   - Improve suspend-related debug printout in the tasks freezer and
     clean up suspend-related console handling (Roger Lu, Borislav
     Petkov).

   - Update the AnalyzeSuspend script in the kernel sources to version
     4.2 (Todd Brandt).

   - Modify the generic power domains framework to make it handle system
     suspend/resume better (Ulf Hansson).

   - Make the runtime PM framework avoid resuming devices synchronously
     when user space changes the runtime PM settings for them and
     improve its error reporting (Rafael Wysocki, Linus Walleij).

   - Fix error paths in devfreq drivers (exynos, exynos-ppmu,
     exynos-bus) and in the core, make some devfreq code explicitly
     non-modular and change some of it into tristate (Bartlomiej
     Zolnierkiewicz, Peter Chen, Paul Gortmaker).

   - Add DT support to the generic PM clocks management code and make it
     export some more symbols (Jon Hunter, Paul Gortmaker).

   - Make the PCI PM core code slightly more robust against possible
     driver errors (Andy Shevchenko).

   - Make it possible to change DESTDIR and PREFIX in turbostat (Andy
     Shevchenko)"

* tag 'pm-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (89 commits)
  Revert "cpufreq: pcc-cpufreq: update default value of cpuinfo_transition_latency"
  PM / hibernate: Introduce test_resume mode for hibernation
  cpufreq: export cpufreq_driver_resolve_freq()
  cpufreq: Disallow ->resolve_freq() for drivers providing ->target_index()
  PCI / PM: check all fields in pci_set_platform_pm()
  cpufreq: acpi-cpufreq: use cached frequency mapping when possible
  cpufreq: schedutil: map raw required frequency to driver frequency
  cpufreq: add cpufreq_driver_resolve_freq()
  cpufreq: intel_pstate: Check cpuid for MSR_HWP_INTERRUPT
  intel_pstate: Update cpu_frequency tracepoint every time
  cpufreq: intel_pstate: clean remnant struct element
  PM / tools: scripts: AnalyzeSuspend v4.2
  x86 / hibernate: Use hlt_play_dead() when resuming from hibernation
  cpufreq: powernv: Replacing pstate_id with frequency table index
  intel_pstate: Fix MSR_CONFIG_TDP_x addressing in core_get_max_pstate()
  PM / hibernate: Image data protection during restoration
  PM / hibernate: Add missing braces in __register_nosave_region()
  PM / hibernate: Clean up comments in snapshot.c
  PM / hibernate: Clean up function headers in snapshot.c
  PM / hibernate: Add missing braces in hibernate_setup()
  ...
2016-07-26 17:29:07 -07:00
Vladimir Davydov 632c0a1aff mm: clean up non-standard page->_mapcount users
- Add a proper comment to page->_mapcount.

 - Introduce a macro for generating helper functions.

 - Place all special page->_mapcount values next to each other so that
   readers can see all possible values and so we don't get duplicates.

Link: http://lkml.kernel.org/r/502f49000e0b63e6c62e338fac6b420bf34fb526.1464079537.git.vdavydov@virtuozzo.com
Signed-off-by: Vladimir Davydov <vdavydov@virtuozzo.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-07-26 16:19:19 -07:00
Riku Voipio 8cde0daf6c scripts/bloat-o-meter: fix percent on <1% changes
Python divisions are integer divisions unless at least one parameter is
a float.  The current bloat-o-meter fails to print sub-percentage
changes:

  Total: Before=10515408, After=10604060, chg 0.000000%

Force float division by using one float and pretty the print to two
significant decimals:

  Total: Before=10515408, After=10604060, chg +0.84%

Link: http://lkml.kernel.org/r/1465980311-23814-1-git-send-email-riku.voipio@linaro.org
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Michal Marek <mmarek@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-07-26 16:19:19 -07:00
Marcin Mielniczuk 4c586062b2 Fix the Debian packaging script on systems with no codename
When calling `make deb-pkg` on a system with no codename (for example
Arch Linux), lsb_release sometimes outputs `n/a` as the codename.

This breaks dpkg-parsechangelog, which can't process the changelog
correctly.

Signed-off-by: Marcin Mielniczuk <marmistrz.dev@gmail.com>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-07-26 23:12:08 +02:00
Henning Schild ca617dc68b builddeb: fix file permissions before packaging
Builddep is not very explicit about file permissions. Actually the file
permissions in the package are largely influenced by the umask of the
user cloning the git and building the package. If that umask does not
set go+r the resulting linux-headers package will prevent non-root users
from building out-of-tree modules. And that is probably just one
unexpected effect.
Being a packaging/install tool builddep should make sure the file
permissions are set correctly and not just derived from a value that is
never checked.

This patch sets ugo read permissions for all packaged files and derives
the executable bit for directories and executables from the file-owner.

Signed-off-by: Henning Schild <henning.schild@siemens.com>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-07-26 22:26:46 +02:00
Linus Torvalds 0f776dc377 Some big changes this month, headlined by the addition of a new formatted
documentation mechanism based on the Sphinx system.  The objectives here
 are to make it easier to create better-integrated (and more attractive)
 documents while (eventually) dumping our one-of-a-kind, cobbled-together
 system for something that is widely used and maintained by others.  There's
 a fair amount of information what's being done, why, and how to use it in:
 
   https://lwn.net/Articles/692704/
   https://lwn.net/Articles/692705/
 
 Closer to home, Documentation/kernel-documentation.rst describes how it
 works.
 
 For now, the new system exists alongside the old one; you should soon see
 the GPU documentation converted over in the DRM pull and some significant
 media conversion work as well.  Once all the docs have been moved over and
 we're convinced that the rough edges (of which are are a few) have been
 smoothed over, the DocBook-based stuff should go away.
 
 Primary credit is to Jani Nikula for doing the heavy lifting to make this
 stuff actually work; there has also been notable effort from Markus Heiser,
 Daniel Vetter, and Mauro Carvalho Chehab.
 
 Expect a couple of conflicts on the new index.rst file over the course of
 the merge window; they are trivially resolvable.  That file may be a bit of
 a conflict magnet in the short term, but I don't expect that situation to
 last for any real length of time.
 
 Beyond that, of course, we have the usual collection of tweaks, updates,
 and typo fixes.
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Merge tag 'docs-for-linus' of git://git.lwn.net/linux

Pull documentation updates from Jonathan Corbet:
 "Some big changes this month, headlined by the addition of a new
  formatted documentation mechanism based on the Sphinx system.

  The objectives here are to make it easier to create better-integrated
  (and more attractive) documents while (eventually) dumping our
  one-of-a-kind, cobbled-together system for something that is widely
  used and maintained by others.  There's a fair amount of information
  what's being done, why, and how to use it in:

    https://lwn.net/Articles/692704/
    https://lwn.net/Articles/692705/

  Closer to home, Documentation/kernel-documentation.rst describes how
  it works.

  For now, the new system exists alongside the old one; you should soon
  see the GPU documentation converted over in the DRM pull and some
  significant media conversion work as well.  Once all the docs have
  been moved over and we're convinced that the rough edges (of which are
  are a few) have been smoothed over, the DocBook-based stuff should go
  away.

  Primary credit is to Jani Nikula for doing the heavy lifting to make
  this stuff actually work; there has also been notable effort from
  Markus Heiser, Daniel Vetter, and Mauro Carvalho Chehab.

  Expect a couple of conflicts on the new index.rst file over the course
  of the merge window; they are trivially resolvable.  That file may be
  a bit of a conflict magnet in the short term, but I don't expect that
  situation to last for any real length of time.

  Beyond that, of course, we have the usual collection of tweaks,
  updates, and typo fixes"

* tag 'docs-for-linus' of git://git.lwn.net/linux: (77 commits)
  doc-rst: kernel-doc: fix handling of address_space tags
  Revert "doc/sphinx: Enable keep_warnings"
  doc-rst: kernel-doc directive, fix state machine reporter
  docs: deprecate kernel-doc-nano-HOWTO.txt
  doc/sphinx: Enable keep_warnings
  Documentation: add watermark_scale_factor to the list of vm systcl file
  kernel-doc: Fix up warning output
  docs: Get rid of some kernel-documentation warnings
  doc-rst: add an option to ignore DocBooks when generating docs
  workqueue: Fix a typo in workqueue.txt
  Doc: ocfs: Fix typo in filesystems/ocfs2-online-filecheck.txt
  Documentation/sphinx: skip build if user requested specific DOCBOOKS
  Documentation: add cleanmediadocs to the documentation targets
  Add .pyc files to .gitignore
  Doc: PM: Fix a typo in intel_powerclamp.txt
  doc-rst: flat-table directive - initial implementation
  Documentation: add meta-documentation for Sphinx and kernel-doc
  Documentation: tiny typo fix in usb/gadget_multi.txt
  Documentation: fix wrong value in md.txt
  bcache: documentation formatting, edited for clarity, stripe alignment notes
  ...
2016-07-26 13:05:11 -07:00
Linus Torvalds 80f09cf5c1 Merge branch 'x86-build-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 build updates from Ingo Molnar:
 "A build system fix and a cleanup"

* 'x86-build-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  kbuild: Remove stale asm-generic wrappers
  kbuild, x86: Track generated headers with generated-y
2016-07-25 18:00:18 -07:00
Rafael J. Wysocki 7f234a4d8a Merge branches 'pm-sleep' and 'pm-tools'
* pm-sleep:
  PM / hibernate: Introduce test_resume mode for hibernation
  x86 / hibernate: Use hlt_play_dead() when resuming from hibernation
  PM / hibernate: Image data protection during restoration
  PM / hibernate: Add missing braces in __register_nosave_region()
  PM / hibernate: Clean up comments in snapshot.c
  PM / hibernate: Clean up function headers in snapshot.c
  PM / hibernate: Add missing braces in hibernate_setup()
  PM / hibernate: Recycle safe pages after image restoration
  PM / hibernate: Simplify mark_unsafe_pages()
  PM / hibernate: Do not free preallocated safe pages during image restore
  PM / suspend: show workqueue state in suspend flow
  PM / sleep: make PM notifiers called symmetrically
  PM / sleep: Make pm_prepare_console() return void
  PM / Hibernate: Don't let kasan instrument snapshot.c

* pm-tools:
  PM / tools: scripts: AnalyzeSuspend v4.2
  tools/turbostat: allow user to alter DESTDIR and PREFIX
2016-07-25 13:44:32 +02:00
Linus Torvalds 25a0dc4be8 Staging / IIO driver update for 4.8-rc1
Here is the big Staging and IIO driver update for 4.8-rc1.
 
 We ended up adding more code than removing, again, but it's not all that
 bad.  Lots of cleanups all over the staging tree, and new IIO drivers,
 full details in the shortlog.
 
 All of these have been in linux-next for a while with no reported issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'staging-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging and IIO driver updates from Greg KH:
 "Here is the big Staging and IIO driver update for 4.8-rc1.

  We ended up adding more code than removing, again, but it's not all
  that bad.  Lots of cleanups all over the staging tree, and new IIO
  drivers, full details in the shortlog.

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'staging-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (417 commits)
  drivers:iio:accel:mma8452: removed unwanted return statements
  drivers:iio:accel:mma8452: added cleanup provision in case of failure.
  iio: Add iio.git tree to MAINTAINERS
  iio:st_pressure: clean useless static channel initializers
  iio:st_pressure:lps22hb: temperature support
  iio:st_pressure:lps22hb: open drain support
  iio:st_pressure: temperature triggered buffering
  iio:st_pressure: document sampling gains
  iio:st_pressure: align storagebits on power of 2
  iio:st_sensors: align on storagebits boundaries
  staging:iio:lis3l02dq drop separate driver
  iio: accel: st_accel: Add lis3l02dq support
  iio: adc: add missing of_node references to iio_dev
  iio: adc: ti-ads1015: add indio_dev->dev.of_node reference
  iio: potentiometer: Fix typo in Kconfig
  iio: potentiometer: mcp4531: Add device tree binding
  iio: potentiometer: mcp4531: Add device tree binding documentation
  iio: potentiometer: mcp4531: Add support for MCP454x, MCP456x, MCP464x and MCP466x
  iio:imu:mpu6050: icm20608 initial support
  iio: adc: max1363: Add device tree binding
  ...
2016-07-24 16:55:23 -07:00
Mauro Carvalho Chehab a3f57ad0e4 doc-rst: kernel-doc: fix a change introduced by mistake
changeset b7e67f6c1b ("doc-rst: linux_tv: supress lots of warnings")
were meant to touch only on media files, but it also touched
at this script by mistake. Revert such change.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2016-07-23 08:04:21 -03:00
Mauro Carvalho Chehab c278256d05 Merge branch 'patchwork' into topic/docs-next
* patchwork: (1492 commits)
  [media] cec: always check all_device_types and features
  [media] cec: poll should check if there is room in the tx queue
  [media] vivid: support monitor all mode
  [media] cec: fix test for unconfigured adapter in main message loop
  [media] cec: limit the size of the transmit queue
  [media] cec: zero unused msg part after msg->len
  [media] cec: don't set fh to NULL in CEC_TRANSMIT
  [media] cec: clear all status fields before transmit and always fill in sequence
  [media] cec: CEC_RECEIVE overwrote the timeout field
  [media] cxd2841er: Reading SNR for DVB-C added
  [media] cxd2841er: Reading BER and UCB for DVB-C added
  [media] cxd2841er: fix switch-case for DVB-C
  [media] cxd2841er: fix signal strength scale for ISDB-T
  [media] cxd2841er: adjust the dB scale for DVB-C
  [media] cxd2841er: provide signal strength for DVB-C
  [media] cxd2841er: fix BER report via DVBv5 stats API
  [media] mb86a20s: apply mask to val after checking for read failure
  [media] airspy: fix error logic during device register
  [media] s5p-cec/TODO: add TODO item
  [media] cec/TODO: drop comment about sphinx documentation
  ...

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2016-07-23 07:59:19 -03:00
Mauro Carvalho Chehab 7e5b7d1b3a Merge branch 'docs-next' of git://git.lwn.net/linux into topic/docs-next
* 'docs-next' of git://git.lwn.net/linux:
  doc-rst: kernel-doc: fix handling of address_space tags
  Revert "doc/sphinx: Enable keep_warnings"
  doc-rst: kernel-doc directive, fix state machine reporter
  docs: deprecate kernel-doc-nano-HOWTO.txt
  doc/sphinx: Enable keep_warnings
  Documentation: add watermark_scale_factor to the list of vm systcl file
  kernel-doc: Fix up warning output
  docs: Get rid of some kernel-documentation warnings
2016-07-23 07:55:59 -03:00
Mauro Carvalho Chehab a88b1672d4 doc-rst: kernel-doc: fix handling of address_space tags
The RST cpp:function handler is very pedantic: it doesn't allow any
macros like __user on it:

	Documentation/media/kapi/dtv-core.rst:28: WARNING: Error when parsing function declaration.
	If the function has no return type:
	  Error in declarator or parameters and qualifiers
	  Invalid definition: Expecting "(" in parameters_and_qualifiers. [error at 8]
	    ssize_t dvb_ringbuffer_pkt_read_user (struct dvb_ringbuffer * rbuf, size_t idx, int offset, u8 __user * buf, size_t len)
	    --------^
	If the function has a return type:
	  Error in declarator or parameters and qualifiers
	  If pointer to member declarator:
	    Invalid definition: Expected '::' in pointer to member (function). [error at 37]
	      ssize_t dvb_ringbuffer_pkt_read_user (struct dvb_ringbuffer * rbuf, size_t idx, int offset, u8 __user * buf, size_t len)
	      -------------------------------------^
	  If declarator-id:
	    Invalid definition: Expecting "," or ")" in parameters_and_qualifiers, got "*". [error at 102]
	      ssize_t dvb_ringbuffer_pkt_read_user (struct dvb_ringbuffer * rbuf, size_t idx, int offset, u8 __user * buf, size_t len)
	      ------------------------------------------------------------------------------------------------------^

So, we have to remove it from the function prototype.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-07-22 15:34:24 -06:00
Gaurav Minocha ca0cd118a1 scripts/dtc: dt_to_config - kernel config options for a devicetree
Determining which kernel config options need to be enabled for a
given devicetree can be a painful process.  Create a new tool to
find the drivers that may match a devicetree node compatible,
find the kernel config options that enable the driver, and
optionally report whether the kernel config option is enabled.

Signed-off-by: Gaurav Minocha <gaurav.minocha.os@gmail.com>
Signed-off-by: Frank Rowand <frank.rowand@am.sony.com>
Signed-off-by: Rob Herring <robh@kernel.org>
2016-07-22 14:48:16 -05:00
Tautschnig, Michael 21532b9e5b scripts: Fix size mismatch of kexec_purgatory_size
bin2c is used to create a valid C file out of a binary file where two
symbols will be globally defined: <name> and <name>_size. <name> is
passed as the first parameter of the host binary.

Building using goto-cc reported that the purgatory binary code (the only
current user of this utility) declares kexec_purgatory_size as 'size_t'
where bin2c generate <name>_size to be 'int' so in a 64-bit host where
sizeof(size_t) > sizeof(int) this type mismatch will always yield the
wrong value for big-endian architectures while for little-endian it will
be wrong if the object laid in memory directly after
kexec_purgatory_size contains non-zero value at the time of reading.

This commit changes <name>_size to be size_t instead.

Note:

Another way to fix the problem is to change the type of
kexec_purgatory_size to be 'int' as there's this check in code:
(kexec_purgatory_size <= 0)

Signed-off-by: Michael Tautschnig <tautschn@amazon.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-07-22 14:05:40 +02:00
Luis R. Rodriguez cc65e82336 scripts/coccinelle: require coccinelle >= 1.0.4 on device_node_continue.cocci
Make use of the new Requires: tag to be able to specify coccinelle binary
version requirements. The cocci file device_node_continue.cocci requires at
least coccinelle 1.0.4.

Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Acked-by: Nicolas Palix <nicolas.palix@imag.fr>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-07-22 12:13:39 +02:00
Luis R. Rodriguez c100d537b9 coccicheck: refer to Documentation/coccinelle.txt and wiki
Refer to the Documentation/coccinelle.txt and supplemental documentation
on the wiki:

https://bottest.wiki.kernel.org/coccicheck

This page shall always refer to the linux-next iteration of scripts/coccicheck.

v4: only refer to the wiki as supplemental documentation, and also
    update Documentation/coccinelle.txt.

Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org>
Acked-by: Nicolas Palix <nicolas.palix@imag.fr>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-07-22 12:13:39 +02:00
Luis R. Rodriguez a9e064c004 coccicheck: add support for requring a coccinelle version
Enable Coccinelle SmPL patches to require a specific version of
Coccinelle. In the event that the version does not match we just
inform the user, if the user asked to go through all SmPL patches
we just inform them of the need for a new version of coccinelle for
the SmPL patch and continue on with the rest.

This uses the simple kernel scripts/ld-version.sh to create a weight
on the version provided by spatch. The -dirty attribute is ignored if
supplied, the benefit of scripts/ld-version.sh is it has a long history
and well tested.

While at it, document the // Options stuff as well.

v4: Document // Options and // Requires as well on
    Documentation/coccinelle.txt.

Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org>
Acked-by: Nicolas Palix <nicolas.palix@imag.fr>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-07-22 12:13:39 +02:00
Luis R. Rodriguez 5c384dba97 coccicheck: replace --very-quiet with --quiet when debugging
When debugging (using --profile or --show-trying) you want to
avoid supressing output,  use --quiet instead. While at it, extend
documentation for SPFLAGS use.

For instance one can use:

$ export COCCI=scripts/coccinelle/misc/irqf_oneshot.cocci
$ make coccicheck DEBUG_FILE="poo.err" MODE=report SPFLAGS="--profile --show-trying" M=./drivers/mfd/arizona-irq.c

Expand Documentation/coccinelle.txt as well.

v4: expand Documentation/coccinelle.txt
v3: rebased, resolve conflicts, expand Documentation/coccinelle.txt
v2: use egrep instead of the *"=--option"* check, this doesn't work for
    disjunctions.

Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-07-22 12:13:39 +02:00
Luis R. Rodriguez be1fa90066 coccicheck: add support for DEBUG_FILE
Enable to capture stderr via a DEBUG_FILE variable passed to
coccicheck. You can now do:

$ rm -f cocci.err
$ export COCCI=scripts/coccinelle/free/kfree.cocci
$ make coccicheck MODE=report DEBUG_FILE=cocci.err
...
$ cat cocci.err

This will be come more useful once we add support to
use more things which would go into stderr, such as
profiling. That will be done separately in another
commit.

Expand Documentation/coccinelle.txt with details.

Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org>
Acked-by: Nicolas Palix <nicolas.palix@imag.fr>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-07-22 12:13:39 +02:00
Luis R. Rodriguez c930a1b23b coccicheck: enable parmap support
Coccinelle has had parmap support since 1.0.2, this means
it supports --jobs, enabling built-in multithreaded functionality,
instead of needing one to script it out. Just look for --jobs
in the help output to determine if this is supported and use it
only if your number of processors detected is > 1.

If parmap is enabled also enable the load balancing to be dynamic, so
that if a thread finishes early we keep feeding it.

stderr is currently sent to /dev/null, addressing a way to capture
that will be addressed next.

If --jobs is not supported we fallback to the old mechanism.
We expect to deprecate the old mechanism as soon as we can get
confirmation all users are ready.

While at it propagate back into the shell script any coccinelle error
code. When used in serialized mode where all cocci files are run this
also stops processing if an error has occured. This lets us handle some
errors in coccinelle cocci files and if they bail out we should inspect
the errors. This will be more useful later to help annotate coccinelle
version dependency requirements. This will let you run only SmPL files
that your system supports.

Extend Documentation/coccinelle.txt as well.

As a small example, prior to this change, on an 8-core system:

Before:

$ export COCCI=scripts/coccinelle/free/kfree.cocci
$ time make coccicheck MODE=report
...

real    29m14.912s
user    103m1.796s
sys     0m4.464s

After:

real    16m22.435s
user    128m30.060s
sys     0m2.712s

v4:

o expand Documentation/coccinelle.txt to reflect parmap support info
o update commit log to reflect what we actually do now with stderr
o split out DEBUG_FILE use into another patch
o detect number of CPUs and if its 1 then skip parmap support,
  note that if you still support parmap, but have 1 CPU you will
  also go through the new branches, so the old complex multithreaded process
  is skipped as well.

v3:

o move USE_JOBS to avoid being overriden

v2:

o redirect coccinelle stderr to /dev/null by default and
  only if DEBUG_FILE is used do we pass it to a file
o fix typo of paramap/parmap

Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org>
Acked-by: Nicolas Palix <nicolas.palix@imag.fr>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-07-22 12:13:39 +02:00
Luis R. Rodriguez 8e826ad52b coccicheck: make SPFLAGS more useful
SPFLAGS is set early, it means that any heuristics done on
coccicheck cannot be overridden currently. Move SPFLAGS
after OPTIONS and set this at the end. This lets you override
any heuristics as coccinelle treats conflicts by only listening
to the last option that makes sense.

v3: this patch was added in the v3 series
v4: Update Documentation/coccinelle.txt explaining how
    SPFLAGS works as well.

Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org>
Acked-by: Nicolas Palix <nicolas.palix@imag.fr>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-07-22 12:13:39 +02:00
Luis R. Rodriguez 13d9486533 coccicheck: move spatch binary check up
This has no functional changes. This is being done
to enable us to later use spatch binary for some
flag checking for certain features early on.

Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org>
Acked-by: Nicolas Palix <nicolas.palix@imag.fr>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-07-22 12:13:39 +02:00
Wilfried Klaebe 15f6d33715 builddeb: really include objtool binary in headers package
On May 4th, Bjørn Mork provided patch 697bbc7b83 ("builddeb: include
objtool binary in headers package"). However, that one only works if
$srctree=$objtree, because the objtool binaries are not written to the
srctree, but to the objtree.

Signed-off-by: Wilfried Klaebe <linux-kernel@lebenslange-mailadresse.de>
Fixes: 697bbc7b83 ("builddeb: include objtool binary in headers package")
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-07-19 11:19:27 +02:00
Arnd Bergmann db547ef190 Kbuild: don't add obj tree in additional includes
When building with separate object directories and driver specific
Makefiles that add additional header include paths, Kbuild adjusts
the gcc flags so that we include both the directory in the source
tree and in the object tree.

However, due to another bug I fixed earlier, this did not actually
include the correct directory in the object tree, so we know that
we only really need the source tree here. Also, including the
object tree sometimes causes warnings about nonexisting directories
when the include path only exists in the source.

This changes the logic to only emit the -I argument for the srctree,
not for objects. We still need both $(srctree)/$(src) and $(obj)
though, so I'm adding them manually.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-07-18 21:31:35 +02:00
Arnd Bergmann b999596b96 Kbuild: don't add ../../ to include path
When we build with O=objdir and objdir is directly below the source tree,
$(srctree) becomes '..'.

When a Makefile adds a CFLAGS option like -Ipath/to/headers and
we are building with a separate object directory, Kbuild tries to
add two -I options, one for the source tree and one for the object
tree. An absolute path is treated as a special case, and don't add
this one twice. This also normally catches -I$(srctree)/$(src)
as $(srctree) usually is an absolute directory like /home/arnd/linux/.

The combination of the two behaviors however results in an invalid
path name to be included: we get both ../$(src) and ../../$(src),
the latter one pointing outside of the source tree, usually to a
nonexisting directory. Building with 'make W=1' makes this obvious:

cc1: error: ../../arch/arm/mach-s3c24xx/include: No such file or directory [-Werror=missing-include-dirs]

This adds another special case, treating path names starting with ../
like those starting with / so we don't try to prefix that with
$(srctree).

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-07-18 21:31:35 +02:00
Daniel Vetter e7ca311e37 kernel-doc: Fix up warning output
While trying to make gpu docs warning free I stumbled over one output
which wasn't following proper compiler error output standards. Fix it
up for more quickfix awesomeness.

Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: linux-doc@vger.kernel.org
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-07-17 20:38:35 -06:00
Mauro Carvalho Chehab d8e9230c2e [media] extract_xc3028.pl: move it to scripts/dir
This doesn't belong at documentation. Move it to scripts.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2016-07-17 14:08:12 -03:00
Mauro Carvalho Chehab fcbf5ca0b8 [media] doc-rst: move DVB avulse docs to Documentation/media
There are several documentation stuff under Documentation/dvb.

Move them to Documentation/media/dvb-drivers and rename them to
rst, as they'll soon be converted to rst files.

No changes at the documentation.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2016-07-17 14:02:45 -03:00
Todd Brandt af1e45e6ab PM / tools: scripts: AnalyzeSuspend v4.2
Update AnalyzeSuspend to v4.2:

 - kprobe support for function tracing
 - config file support in lieu of command line options
 - advanced callgraph support for function debug
 - dev mode for monitoring common sources of delay, e.g. msleep, udelay
 - many bug fixes and formatting upgrades

Signed-off-by: Todd Brandt <todd.e.brandt@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-07-15 23:34:14 +02:00
Kieran Bingham b447e02548 Revert "scripts/gdb: add a Radix Tree Parser"
This reverts commit e127a73d41 ("scripts/gdb: add a Radix Tree
Parser")

The python implementation of radix-tree was merged at the same time as
the radix-tree system was heavily reworked from commit e9256efcc8
("radix-tree: introduce radix_tree_empty") to 3bcadd6fa6 ("radix-tree:
free up the bottom bit of exceptional entries for reuse") and no longer
functions, but also prevents other gdb scripts from loading.

This functionality has not yet hit a release, so simply remove it for
now

Link: http://lkml.kernel.org/r/1467127337-11135-6-git-send-email-kieran@bingham.xyz
Signed-off-by: Kieran Bingham <kieran@bingham.xyz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-07-15 14:54:27 +09:00
Nikolay Borisov 552ab2a3ea scripts/gdb: Perform path expansion to lx-symbol's arguments
Python doesn't do automatic expansion of paths.  In case one passes path
of the from ~/foo/bar the gdb scripts won't automatically expand that
and as a result the symbols files won't be loaded.

Fix this by explicitly expanding all paths which begin with "~"

Link: http://lkml.kernel.org/r/1467127337-11135-5-git-send-email-kieran@bingham.xyz
Signed-off-by: Nikolay Borisov <n.borisov.lkml@gmail.com>
Signed-off-by: Kieran Bingham <kieran@bingham.xyz>
Reviewed-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-07-15 14:54:27 +09:00
Omar Sandoval e2aa2f8fac scripts/gdb: add constants.py to .gitignore
Since scripts/gdb/linux/constants.py is autogenerated, this should have
been added to .gitignore when it was introduced.

Fixes: f197d75fca ("scripts/gdb: provide linux constants")
Link: http://lkml.kernel.org/r/1467127337-11135-4-git-send-email-kieran@bingham.xyz
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Kieran Bingham <kieran@bingham.xyz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-07-15 14:54:27 +09:00
Kieran Bingham 834a35296a scripts/gdb: rebuild constants.py on dependancy change
The autogenerated constants.py file was only being built on the initial
call, and if the constants.py.in file changed.  As we are utilising the
CPP hooks, we can successfully use the call if_changed_dep rules to
determine when to rebuild the file based on it's inclusions.

Link: http://lkml.kernel.org/r/1467127337-11135-3-git-send-email-kieran@bingham.xyz
Signed-off-by: Kieran Bingham <kieran@bingham.xyz>
Reported-by: Jan Kiszka <jan.kiszka@web.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-07-15 14:54:27 +09:00
Kieran Bingham abb035b482 scripts/gdb: silence 'nothing to do' message
The constants.py generation, involves a rule to link into the main
makefile.  This rule has no command and generates a spurious warning
message in the build logs when CONFIG_SCRIPTS_GDB is enabled.

Fix simply by giving a no-op action

Link: http://lkml.kernel.org/r/1467127337-11135-2-git-send-email-kieran@bingham.xyz
Signed-off-by: Kieran Bingham <kieran@bingham.xyz>
Reported-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-07-15 14:54:27 +09:00
Dan Williams 7a9eb20666 pmem: kill __pmem address space
The __pmem address space was meant to annotate codepaths that touch
persistent memory and need to coordinate a call to wmb_pmem().  Now that
wmb_pmem() is gone, there is little need to keep this annotation.

Cc: Christoph Hellwig <hch@lst.de>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-07-12 19:25:38 -07:00
James Hogan cda2c65f98 kbuild: Remove stale asm-generic wrappers
When a header file is removed from generic-y (often accompanied by the
addition of an arch specific header), the generated wrapper file will
persist, and in some cases may still take precedence over the new arch
header.

For example commit f1fe2d21f4 ("MIPS: Add definitions for extended
context") removed ucontext.h from generic-y in arch/mips/include/asm/,
and added an arch/mips/include/uapi/asm/ucontext.h. The continued use of
the wrapper when reusing a dirty build tree resulted in build failures
in arch/mips/kernel/signal.c:

arch/mips/kernel/signal.c: In function ‘sc_to_extcontext’:
arch/mips/kernel/signal.c:142:12: error: ‘struct ucontext’ has no member named ‘uc_extcontext’
  return &uc->uc_extcontext;
            ^
Fix by detecting and removing wrapper headers in generated header
directories that do not correspond to a filename in generic-y, genhdr-y,
or the newly introduced generated-y.

Reported-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Reported-by: Hauke Mehrtens <hauke@hauke-m.de>
Reported-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Cc: linux-arch@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: linux-kbuild@vger.kernel.org
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Michal Marek <mmarek@suse.com>
Link: http://lkml.kernel.org/r/1466808144-23209-3-git-send-email-james.hogan@imgtec.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-07-07 15:58:45 +02:00
Mauro Carvalho Chehab 64e4954619 doc-rst: linux_tv: remove trailing comments
The conversion script added some comments at the end.
They point to the original DocBook files, with will be
removed after the manual fixes. So, they'll be pointing
to nowere. So, remove those comments.

They'll be forever stored at the Kernel tree. So, if
someone wants the references, it is just a matter of
looking at the backlog.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2016-07-03 17:47:40 -03:00
Mauro Carvalho Chehab b7e67f6c1b doc-rst: linux_tv: supress lots of warnings
The c language parser checks if there are duplicated object
definitions. That causes lots of warnings like:
	WARNING: duplicate C object description of ioctl

Let's remove those by telling Sphinx that the language for
those objects are c++. The look of the descriptions will
be close, and the warnings will be gone.

Please notice that we had to keep a few of them as C, as
the c++ parser seems to be broken when it finds an enum.

Yet, this reduced from 219 warnings to 143, with is
a good thing.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2016-07-03 10:05:16 -03:00
Stuart Yoder 0afef45654 staging: fsl-mc: add support for device table matching
Move the definition of fsl_mc_device_id to its proper location in
mod_devicetable.h, and add fsl-mc bus support to devicetable-offsets.c
and file2alias.c to enable device table matching.  With this patch udev
based module loading of fsl-mc drivers is supported.

Signed-off-by: Stuart Yoder <stuart.yoder@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-06-26 17:14:03 -07:00
Yann Droneaud b7b2ee41f3 coccinelle: catch krealloc() on devm_*() allocated memory
krealloc() must not be used against devm_*() allocated
memory regions:

- if a bigger memory is to be allocated, krealloc() and
  __krealloc() could return a different pointer than the
  one given to them, creating a memory region which is not
  managed, thus it will not be automatically released on
  device removal.

- if a bigger memory is to be allocated, krealloc() could
  kfree() the managed memory region which is passed to it.
  The old pointer is left registered as a resource for the
  device. On device removal, this dangling pointer will be
  used and an unrelated memory region could be released.

- if the requested size is equal to 0, krealloc() can also
  just behave like kfree(). Here too, the old pointer is
  kept associated with the device. On device removal, this
  invalid pointer will be used and an unrelated memory
  region could be released.

For all these reasons, krealloc() must not be used on a
pointer returned by devm_*() functions.

Cc: Tejun Heo <tj@kernel.org>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Yann Droneaud <ydroneaud@opteya.com>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-06-21 11:43:32 +02:00
Yann Droneaud a720c0644d coccinelle: recognize more devm_* memory allocation functions
Updates free/devm_free.cocci to recognize functions added by:

- commit 64c862a839 ('devres: add kernel standard devm_k.alloc functions')
- commit e31108cad3 ('devres: introduce API "devm_kstrdup"')
- commit 3046365bb4 ('devres: introduce API "devm_kmemdup')
- commit 43339bed70 ('devres: Add devm_get_free_pages API')
- commit 75f2a4ead5 ('devres: Add devm_kasprintf and devm_kvasprintf API')

See also Documentation/driver-model/devres.txt

Cc: Joe Perches <joe@perches.com>
Cc: Manish Badarkhe <badarkhe.manish@gmail.com>
Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Cc: Eli Billauer <eli.billauer@gmail.com>
Cc: Himangi Saraogi <himangi774@gmail.com>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Wolfram Sang <w.sang@pengutronix.de>
Cc: Daniel Thompson <daniel.thompson@linaro.org>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Yann Droneaud <ydroneaud@opteya.com>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-06-21 11:43:32 +02:00
Yann Droneaud 6dd9379e8f coccinelle: also catch kzfree() issues
Since commit 3ef0e5ba46 ('slab: introduce kzfree()'),
kfree() is no more the only function to be considered:
kzfree() should be recognized too.

In particular, kzfree() must not be called on memory
allocated through devm_*() functions.

Cc: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Yann Droneaud <ydroneaud@opteya.com>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-06-21 11:43:32 +02:00
Deepa Dinamani 7a2358b381 coccicheck: Allow for overriding spatch flags
Documentation/coccinelle.txt suggests using the SPFLAGS
make variable to pass additional options to spatch.

Reorder the way SPFLAGS is added to FLAGS, to allow
for options in the SPFLAGS to override the default
--very-quiet option.

Similarly, rearrage the FLAGS for org or report mode.
This allows for overriding of the default --no-show-diff
option through SPFLAGS.

Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Cc: Gilles Muller <Gilles.Muller@lip6.fr>
Acked-by: Nicolas Palix <nicolas.palix@imag.fr>
Acked-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-06-20 22:08:13 +02:00
Wolfram Sang 78283edf2c kbuild: setlocalversion: print error to STDERR
I tried to use 'make O=...' from an unclean source tree. This triggered
the error path of setlocalversion. But by printing to STDOUT, it created
a broken localversion which then caused another (unrelated) error:

"4.7.0-rc2Error: kernelrelease not valid - run make prepare to update it" exceeds 64 characters

After printing to STDERR, the true build error gets displayed later:

  /home/wsa/Kernel/linux is not clean, please run 'make mrproper'
  in the '/home/wsa/Kernel/linux' directory.

Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-06-20 17:37:45 +02:00
Vaishali Thakkar bf56cc04ef Coccinelle: noderef: Add new rules and correct the old rule
Add new rules to detect the cases where sizeof is used in
function calls as a argument.

Also, for the patch mode third rule should behave same as
second rule with arguments reversed. So, change that as well.

Signed-off-by: Vaishali Thakkar <vaishali.thakkar@oracle.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-06-20 17:20:13 +02:00
David Howells 9552c7aebb modsign: Make sign-file determine the format of the X.509 cert
Make sign-file determine the format of the X.509 certificate by reading the
first two bytes and seeing if the first byte is 0x30 and the second
0x81-0x84.  If this is the case, assume it's DER encoded, otherwise assume
it to be PEM encoded.

Without this, it gets awkward to deal with the error messages from
d2i_X509_bio() when we want to call BIO_reset() and then PEM_read_bio() in
case the certificate was PEM encoded rather than X.509 encoded.

Reported-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Ben Hutchings <ben@decadent.org.uk>
cc: David Woodhouse <dwmw2@infradead.org>
cc: Juerg Haefliger <juerg.haefliger@hpe.com>
cc: Ben Hutchings <ben@decadent.org.uk>
2016-06-14 13:18:33 +01:00
Linus Torvalds ccf55f73a6 powerpc fixes for 4.7 #2
- ptrace: Fix out of bounds array access warning from Khem Raj
  - pseries: Fix PCI config address for DDW from Gavin Shan
  - pseries: Fix IBM_ARCH_VEC_NRCORES_OFFSET since POWER8NVL was added from Michael Ellerman
  - of: fix autoloading due to broken modalias with no 'compatible' from Wolfram Sang
  - radix: Fix always false comparison against MMU_NO_CONTEXT from Aneesh Kumar K.V
  - hash: Compute the segment size correctly for ISA 3.0 from Aneesh Kumar K.V
  - nohash: Fix build break with 64K pages from Michael Ellerman
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Merge tag 'powerpc-4.7-3Michael Ellerman:' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc fixes from
 - ptrace: Fix out of bounds array access warning from Khem Raj
 - pseries: Fix PCI config address for DDW from Gavin Shan
 - pseries: Fix IBM_ARCH_VEC_NRCORES_OFFSET since POWER8NVL was added
   from Michael Ellerman
 - of: fix autoloading due to broken modalias with no 'compatible' from
   Wolfram Sang
 - radix: Fix always false comparison against MMU_NO_CONTEXT from Aneesh
   Kumar K.V
 - hash: Compute the segment size correctly for ISA 3.0 from Aneesh
   Kumar K.V
 - nohash: Fix build break with 64K pages from Michael Ellerman

* tag 'powerpc-4.7-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/nohash: Fix build break with 64K pages
  powerpc/mm/hash: Compute the segment size correctly for ISA 3.0
  powerpc/mm/radix: Fix always false comparison against MMU_NO_CONTEXT
  of: fix autoloading due to broken modalias with no 'compatible'
  powerpc/pseries: Fix IBM_ARCH_VEC_NRCORES_OFFSET since POWER8NVL was added
  powerpc/pseries: Fix PCI config address for DDW
  powerpc/ptrace: Fix out of bounds array access warning
2016-06-10 12:23:49 -07:00
Jani Nikula c9b2cfb3fa kernel-doc: unify all EXPORT_SYMBOL scanning to one place
Scan all input files for EXPORT_SYMBOLs along with the explicitly
specified export files before actually parsing anything.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2016-06-10 11:29:20 +03:00
Jani Nikula 88c2b57da4 kernel-doc: add support for specifying extra files for EXPORT_SYMBOLs
If the kernel-doc comments for functions are not in the same file as the
EXPORT_SYMBOL statements, the -export and -internal output selections do
not work as expected. This is typically the case when the kernel-doc
comments are in header files next to the function declarations and the
EXPORT_SYMBOL statements are next to the function definitions in the
source files.

Let the user specify additional source files in which to look for the
EXPORT_SYMBOLs using the new -export-file FILE option, which may be
given multiple times.

The pathological example for this is include/net/mac80211.h, which has
all the kernel-doc documentation for the exported functions defined in a
plethora of source files net/mac80211/*.c.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2016-06-10 11:29:19 +03:00
Jani Nikula 1ad560e43c kernel-doc: abstract filename mapping
Reduce duplication in follow-up work. No functional changes.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2016-06-10 11:29:19 +03:00
Jani Nikula da9726ecfb kernel-doc: add missing semi-colons in option parsing
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2016-06-10 11:29:18 +03:00
Jani Nikula 95b6be9d19 kernel-doc: do not warn about duplicate default section names
Since

commit 32217761ee
Author: Jani Nikula <jani.nikula@intel.com>
Date:   Sun May 29 09:40:44 2016 +0300

    kernel-doc: concatenate contents of colliding sections

we started getting (more) errors on duplicate section names, especially
on the default section name "Description":

include/net/mac80211.h:3174: warning: duplicate section name 'Description'

This is usually caused by a slightly unorthodox placement of parameter
descriptions, like in the above case, and kernel-doc resetting back to
the default section more than once within a kernel-doc comment.

Ignore warnings on the duplicate section name automatically assigned by
kernel-doc, and only consider explicitly user assigned duplicate section
names an issue.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2016-06-10 11:29:18 +03:00
Jani Nikula 5668604a6c kernel-doc: remove old debug cruft from dump_section()
No functional changes.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2016-06-10 11:29:05 +03:00
Jonathan Corbet 8569de68e7 docs: kernel-doc: Add "example" and "note" to the magic section types
Lots of kerneldoc entries use "example:" or "note:" as section headers.
Until such a time as we can make them use proper markup, make them work as
intended.

Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-06-09 13:35:05 -06:00
Wolfram Sang b3c0a4dab7 of: fix autoloading due to broken modalias with no 'compatible'
Because of an improper dereference, a stray 'C' character was output to
the modalias when no 'compatible' was specified. This is the case for
some old PowerMac drivers which only set the 'name' property. Fix it to
let them match again.

Reported-by: Mathieu Malaterre <malat@debian.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Tested-by: Mathieu Malaterre <malat@debian.org>
Cc: Philipp Zabel <p.zabel@pengutronix.de>
Cc: Andreas Schwab <schwab@linux-m68k.org>
Fixes: 6543becf26 ("mod/file2alias: make modalias generation safe for cross compiling")
Cc: stable@vger.kernel.org # v3.9+
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-06-08 10:40:20 +10:00
Emese Revfy 543c37cb16 Add sancov plugin
The sancov gcc plugin inserts a __sanitizer_cov_trace_pc() call
at the start of basic blocks.

This plugin is a helper plugin for the kcov feature. It supports
all gcc versions with plugin support (from gcc-4.5 on).
It is based on the gcc commit "Add fuzzing coverage support" by Dmitry Vyukov
(https://gcc.gnu.org/viewcvs/gcc?limit_changes=0&view=revision&revision=231296).

Signed-off-by: Emese Revfy <re.emese@gmail.com>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-06-07 22:57:10 +02:00
Emese Revfy 0dae776c6b Add Cyclomatic complexity GCC plugin
Add a very simple plugin to demonstrate the GCC plugin infrastructure. This GCC
plugin computes the cyclomatic complexity of each function.

The complexity M of a function's control flow graph is defined as:
M = E - N + 2P
where
E = the number of edges
N = the number of nodes
P = the number of connected components (exit nodes).

Signed-off-by: Emese Revfy <re.emese@gmail.com>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-06-07 22:57:10 +02:00
Emese Revfy 6b90bd4ba4 GCC plugin infrastructure
This patch allows to build the whole kernel with GCC plugins. It was ported from
grsecurity/PaX. The infrastructure supports building out-of-tree modules and
building in a separate directory. Cross-compilation is supported too.
Currently the x86, arm, arm64 and uml architectures enable plugins.

The directory of the gcc plugins is scripts/gcc-plugins. You can use a file or a directory
there. The plugins compile with these options:
 * -fno-rtti: gcc is compiled with this option so the plugins must use it too
 * -fno-exceptions: this is inherited from gcc too
 * -fasynchronous-unwind-tables: this is inherited from gcc too
 * -ggdb: it is useful for debugging a plugin (better backtrace on internal
    errors)
 * -Wno-narrowing: to suppress warnings from gcc headers (ipa-utils.h)
 * -Wno-unused-variable: to suppress warnings from gcc headers (gcc_version
    variable, plugin-version.h)

The infrastructure introduces a new Makefile target called gcc-plugins. It
supports all gcc versions from 4.5 to 6.0. The scripts/gcc-plugin.sh script
chooses the proper host compiler (gcc-4.7 can be built by either gcc or g++).
This script also checks the availability of the included headers in
scripts/gcc-plugins/gcc-common.h.

The gcc-common.h header contains frequently included headers for GCC plugins
and it has a compatibility layer for the supported gcc versions.

The gcc-generate-*-pass.h headers automatically generate the registration
structures for GIMPLE, SIMPLE_IPA, IPA and RTL passes.

Note that 'make clean' keeps the *.so files (only the distclean or mrproper
targets clean all) because they are needed for out-of-tree modules.

Based on work created by the PaX Team.

Signed-off-by: Emese Revfy <re.emese@gmail.com>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-06-07 22:57:10 +02:00
Emese Revfy 2440387431 Shared library support
Infrastructure for building independent shared library targets.

Based on work created by the PaX Team.

Signed-off-by: Emese Revfy <re.emese@gmail.com>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-06-07 22:57:10 +02:00
Daniel Vetter 0b0f5f29b2 scripts/kernel-doc: Add option to inject line numbers
Opt-in since this wreaks the rst output and must be removed
by consumers again. This is useful to adjust the linenumbers
for included kernel-doc snippets in shinx. With that sphinx
error message will be accurate when there's issues with the
rst-ness of the kernel-doc comments.

Especially when transitioning a new docbook .tmpl to .rst this
is extremely useful, since you can just use your editors compilation
quickfix list to accurately jump from error to error.

v2:
- Also make sure that we filter the LINENO for purpose/at declaration
  start so it only shows for selected blocks, not all of them (Jani).
  While at it make it a notch more accurate.
- Avoid undefined $lineno issues. I tried filtering these out at the
  callsite, but Jani spotted more when linting the entire kernel.
  Unamed unions and similar things aren't stored consistently and end
  up with an undefined line number (but also no kernel-doc text, just
  the parameter type). Simplify things and filter undefined line
  numbers in print_lineno() to catch them all.

v3: Fix LINENO 0 issue for kernel-doc comments without @param: lines
or any other special sections that directly jump to the description
after the "name - purpose" line. Only really possible for functions
without parameters. Noticed by Jani.

Cc: Jani Nikula <jani.nikula@intel.com>
Cc: linux-doc@vger.kernel.org
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2016-06-04 11:35:31 +03:00
Joe Perches 879be4f378 checkpatch: reduce git commit description style false positives
Some lines in a commit log appear to be commit SHA1 ids like:

  ERROR: Please use git commit description style 'commit <12+ chars of sha1> ("<title line>")' - ie: 'commit 0123456789ab ("commit description")'
  Link: http://lkml.kernel.org/r/40e03fd7aaf1f55c75d787128d6d17c5a71226c2.1464358556.git.vdavydov@virtuozzo.com

Reduce the false positives.

Link: http://lkml.kernel.org/r/eda977eaa8328fef42bb3c87935d97e10ea8ff67.1464384023.git.joe@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Reported-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-06-03 16:02:56 -07:00
Daniel Vetter b7afa92b55 scripts/kernel-doc: Also give functions symbolic names
state3 = prototype parsing, so name them accordingly.

Cc: Jani Nikula <jani.nikula@intel.com>
Cc: linux-doc@vger.kernel.org
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2016-06-03 11:41:01 +03:00
Daniel Vetter ebff7f929b scripts/kernel-doc: Remove duplicated DOC: start handling
Further up in the state machinery we switch from STATE_NAME to
STATE_DOCBLOCK when we match /$doc_block/. Which means this block of
code here is entirely unreachable, unless there are multiple DOC:
sections within a single kernel-doc comment.

Getting a list of all the files with more than one DOC: section using

$ git grep -c " * DOC:" | grep -v ":1$"

and then doing a full audit of them reveals there are no such comment
blocks in the kernel.

Supporting multiple DOC: sections in a single kernel-doc comment does
not seem like a recommended way of doing things anyway, so nuke the code
for simplicity.

Cc: Jani Nikula <jani.nikula@intel.com>
Cc: linux-doc@vger.kernel.org
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
[Jani: amended the commit message]
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2016-06-03 11:26:39 +03:00
Jani Nikula 2f4ad40a05 kernel-doc: reset contents and section harder
If the documentation comment does not have params or sections, the
section heading may leak from the previous documentation comment.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2016-05-30 13:39:04 +03:00
Jani Nikula 32217761ee kernel-doc: concatenate contents of colliding sections
If there are multiple sections with the same section name, the current
implementation results in several sections by the same heading, with the
content duplicated from the last section to all. Even if there's the
error message, a more graceful approach is to combine all the
identically named sections into one, with concatenated contents.

With the supported sections already limited to select few, there are
massively fewer collisions than there used to be, but this is still
useful for e.g. when function parameters are documented in the middle of
a documentation comment, with description spread out above and
below. (This is not a recommended documentation style, but used in the
kernel nonetheless.)

We can now also demote the error to a warning.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2016-05-30 13:39:03 +03:00
Jani Nikula f624adef3d kernel-doc: limit the "section header:" detection to a select few
kernel-doc currently identifies anything matching "section header:"
(specifically a string of word characters and spaces followed by a
colon) as a new section in the documentation comment, and renders the
section header accordingly.

Unfortunately, this turns all uses of colon into sections, mostly
unintentionally. Considering the output, erroneously creating sections
when not intended is always worse than erroneously not creating sections
when intended. For example, a line with "http://example.com" turns into
a "http" heading followed by "//example.com" in normal text style, which
is quite ugly. OTOH, "WARNING: Beware of the Leopard" is just fine even
if "WARNING" does not turn into a heading.

It is virtually impossible to change all the kernel-doc comments, either
way. The compromise is to pick the most commonly used and depended on
section headers (with variants) and accept them as section headers.

The accepted section headers are, case insensitive:

 * description:
 * context:
 * return:
 * returns:

Additionally, case sensitive:

 * @return:

All of the above are commonly used in the kernel-doc comments, and will
result in worse output if not identified as section headers. Also,
kernel-doc already has some special handling for all of them, so there's
nothing particularly controversial in adding more special treatment for
them.

While at it, improve the whitespace handling surrounding section
names. Do not consider the whitespace as part of the name.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2016-05-30 13:39:03 +03:00
Jani Nikula cddfe325af kernel-doc/rst: remove fixme comment
Yes, for our purposes the type should contain typedef.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2016-05-30 13:39:02 +03:00
Jani Nikula d4b08e0cd2 kernel-doc/rst: use *undescribed* instead of _undescribed_
The latter isn't special to rst.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2016-05-30 13:39:02 +03:00
Jani Nikula b7886de43c kernel-doc: strip leading whitespace from continued param descs
If a param description spans multiple lines, check any leading
whitespace in the first continuation line, and remove same amount of
whitespace from following lines.

This allows indentation in the multi-line parameter descriptions for
aesthetical reasons while not causing accidentally significant
indentation in the rst output.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2016-05-30 13:39:01 +03:00
Jani Nikula 0a7263014b kernel-doc: improve handling of whitespace on the first line param description
Handle whitespace on the first line of param text as if it was the empty
string. There is no need to add the newline in this case. This improves
the rst output in particular, where blank lines may be problematic in
parameter lists.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2016-05-30 13:39:01 +03:00
Jani Nikula ecbcfba126 kernel-doc/rst: change the output layout
Move away from field lists, and simply use **strong emphasis** for
section headings on lines of their own. Do not use rst section headings,
because their nesting depth depends on the surrounding context, which
kernel-doc has no knowledge of. Also, they do not need to end up in any
table of contexts or indexes.

There are two related immediate benefits. Field lists are typically
rendered in two columns, while the new style uses the horizontal width
better. With no extra indent on the left, there's no need to be as fussy
about it. Field lists are more susceptible to indentation problems than
the new style.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2016-05-30 13:39:00 +03:00
Jani Nikula 6450c8957e kernel-doc: strip leading blank lines from inline doc comments
The inline member markup allows whitespace lines before the actual
documentation starts. Strip the leading blank lines. This improves the
rst output.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2016-05-30 13:39:00 +03:00
Jani Nikula 830066a7a3 kernel-doc/rst: blank lines in output are not needed
Current approach leads to two blank lines, while one is enough.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2016-05-30 13:38:59 +03:00
Jani Nikula a0b96c2dbd kernel-doc: fix wrong code indentation
No functional changes.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2016-05-30 13:38:59 +03:00
Jani Nikula 13901ef27c kernel-doc: do not regard $, %, or & prefixes as special in section names
The use of these is confusing in the script, and per this grep, they're
not used anywhere anyway:

$ git grep " \* [%$&][a-zA-Z0-9_]*:" -- *.[ch] | grep -v "\$\(Id\|Revision\|Date\)"

While at it, throw out the constants array, nothing is ever put there
again.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2016-05-30 13:38:59 +03:00
Jani Nikula c099ff6989 kernel-doc/rst: highlight function/struct/enum purpose lines too
Let the user use @foo, &bar, %baz, etc. in the first kernel-doc purpose
line too.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2016-05-30 13:38:58 +03:00
Jani Nikula 9c9193c49c kernel-doc/rst: drop redundant unescape in highlighting
This bit is already done by xml_unescape() above.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2016-05-30 13:38:58 +03:00
Jani Nikula f3341dcf3b kernel-doc/rst: add support for struct/union/enum member references
Link "&foo->bar", "&foo->bar()", "&foo.bar", and "&foo.bar()" to the
struct/union/enum foo definition. The members themselves do not
currently have anchors to link to, but this is better than nothing, and
promotes a universal notation.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2016-05-30 13:38:57 +03:00
Jani Nikula 47ae7aed34 kernel-doc/rst: add support for &union foo and &typedef foo references
Let the user use "&union foo" and "&typedef foo" to reference foo. The
difference to using "union &foo", "typedef &foo", or just "&foo" (which
are valid too) is that "union" and "typedef" become part of the link
text.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2016-05-30 13:38:57 +03:00
Jani Nikula a7291e7e03 kernel-doc/rst: &foo references are more universal than structs
It's possible to use &foo to reference structs, enums, typedefs, etc. in
the Sphinx C domain. Thus do not prefix the links with "struct".

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2016-05-30 13:38:56 +03:00
Jani Nikula a19bce6433 kernel-doc/rst: reference functions according to C domain spec
The Sphinx C domain spec says function references should include the
parens ().

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2016-05-30 13:38:56 +03:00
Jani Nikula 9e72184b55 kernel-doc/rst: do not output DOC: section titles for requested ones
If the user requests a specific DOC: section by name, do not output its
section title. In these cases, the surrounding context already has a
heading, and the DOC: section title is only used as an identifier and a
heading for clarity in the source file.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2016-05-30 13:38:55 +03:00
Jani Nikula b6c3f456cf kernel-doc: add names for output selection
Make the output selection a bit more readable by adding constants for
the various types of output selection. While at it, actually call the
variable for choosing what to output $output_selection.

No functional changes.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2016-05-30 13:38:55 +03:00
Jani Nikula 48af606ad8 kernel-doc: add names for states and substates
Make the state machine a bit more readable by adding constants for
parser states and inline member documentation parser substates. While at
it, rename the "split" documentation to "inline" documentation.

No functional changes.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2016-05-30 13:38:54 +03:00
Jani Nikula 86ae2e38d4 kernel-doc: support printing exported and non-exported symbols
Currently we use docproc to figure out which symbols are exported, and
then docproc calls kernel-doc on specific functions, to get
documentation on exported functions. According to git blame and docproc
comments, this is due to historical reasons, as functions and their
corresponding EXPORT_SYMBOL* may have been in different files. However
for more than ten years the recommendation in CodingStyle has been to
place the EXPORT_SYMBOL* immediately after the closing function brace
line.

Additionally, the kernel-doc comments for functions are generally placed
above the function definition in the .c files (i.e. where the
EXPORT_SYMBOL* is) rather than above the declaration in the .h
files. There are some exceptions to this, but AFAICT none of these are
included in DocBook documentation using the "!E" docproc directive.

Therefore, assuming the EXPORT_SYMBOL* and kernel-doc are with the
function definition, kernel-doc can extract the exported vs. not
information by making two passes on the input file. Add support for that
via the new -export and -internal parameters.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2016-05-30 13:38:50 +03:00
Jani Nikula 5e64fa9c44 kernel-doc/rst: fix use of uninitialized value
I'm not quite sure why the errors below are happening, but this fixes
them.

Use of uninitialized value in string ne at ./scripts/kernel-doc line 1819, <IN> line 6494.
Use of uninitialized value $_[0] in join or string at ./scripts/kernel-doc line 1759, <IN> line 6494.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2016-05-30 13:38:50 +03:00
Linus Torvalds dc03c0f9d1 Merge branch 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
Pull misc kbuild updates from Michal Marek:
 "This is the non-critical part of kbuild:

   - Coccinelle fixes, one semantic patch less in this round [Vaishali
     Thakkar, Wolfram Sang, Kees Cook]

   - rpm-pkg support for (open)SUSE's update-bootloader [Jiří Kosian]

   - rpm-pkg restored support for $RPMOPTS [Srinivas Pandruvada]

   - deb-pkg fixes for the linux-headers package [Bjørn Mork, Azriel
     Samson]"

* 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
  coccicheck: Fix missing 0 index in kill loop
  scripts/package/Makefile: rpmbuild add support of RPMOPTS
  builddeb: fix missing headers in linux-headers package
  builddeb: include objtool binary in headers package
  kbuild/mkspec: support 'update-bootloader'-based systems
  scripts: coccinelle: remove check to move constants to right
  Coccinelle: setup_timer: Add space in front of parentheses
2016-05-26 22:32:05 -07:00
Linus Torvalds f429d35588 Merge branch 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
Pull kconfig update from Michal Marek:

 - fix for behavior of tristate choice items and fix for documentation
   of existing kconfig behavior [Dirk Gouders]

 - more helpful "unexpected data" kconfig warning [Paul Bolle]

* 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
  kconfig/symbol.c: handle choice_values that depend on 'm' symbols
  kconfig-language: elaborate on the type of a choice
  kconfig-language: fix comment on dependency-generated menu structures.
  kconfig: add unexpected data itself to warning
2016-05-26 22:27:09 -07:00
Linus Torvalds 5b26fc8824 Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
Pull kbuild updates from Michal Marek:

 - new option CONFIG_TRIM_UNUSED_KSYMS which does a two-pass build and
   unexports symbols which are not used in the current config [Nicolas
   Pitre]

 - several kbuild rule cleanups [Masahiro Yamada]

 - warning option adjustments for gcov etc [Arnd Bergmann]

 - a few more small fixes

* 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild: (31 commits)
  kbuild: move -Wunused-const-variable to W=1 warning level
  kbuild: fix if_change and friends to consider argument order
  kbuild: fix adjust_autoksyms.sh for modules that need only one symbol
  kbuild: fix ksym_dep_filter when multiple EXPORT_SYMBOL() on the same line
  gcov: disable -Wmaybe-uninitialized warning
  gcov: disable tree-loop-im to reduce stack usage
  gcov: disable for COMPILE_TEST
  Kbuild: disable 'maybe-uninitialized' warning for CONFIG_PROFILE_ALL_BRANCHES
  Kbuild: change CC_OPTIMIZE_FOR_SIZE definition
  kbuild: forbid kernel directory to contain spaces and colons
  kbuild: adjust ksym_dep_filter for some cmd_* renames
  kbuild: Fix dependencies for final vmlinux link
  kbuild: better abstract vmlinux sequential prerequisites
  kbuild: fix call to adjust_autoksyms.sh when output directory specified
  kbuild: Get rid of KBUILD_STR
  kbuild: rename cmd_as_s_S to cmd_cpp_s_S
  kbuild: rename cmd_cc_i_c to cmd_cpp_i_c
  kbuild: drop redundant "PHONY += FORCE"
  kbuild: delete unnecessary "@:"
  kbuild: mark help target as PHONY
  ...
2016-05-26 22:01:22 -07:00
Arnd Bergmann 92181d47ee headers_check: don't warn about c++ guards
A recent addition to the DRM tree for 4.7 added 'extern "C"' guards
for c++ to all the DRM headers, and that now causes warnings
in 'make headers_check':

usr/include/drm/amdgpu_drm.h:38: userspace cannot reference function or variable defined in the kernel
usr/include/drm/drm.h:63: userspace cannot reference function or variable defined in the kernel
usr/include/drm/drm.h:699: userspace cannot reference function or variable defined in the kernel
usr/include/drm/drm_fourcc.h:30: userspace cannot reference function or variable defined in the kernel
usr/include/drm/drm_mode.h:33: userspace cannot reference function or variable defined in the kernel
usr/include/drm/drm_sarea.h:38: userspace cannot reference function or variable defined in the kernel
usr/include/drm/exynos_drm.h:21: userspace cannot reference function or variable defined in the kernel
usr/include/drm/i810_drm.h:7: userspace cannot reference function or variable defined in the kernel

This changes the headers_check.pl script to not warn about this.
I'm listing the merge commit as introducing the problem, because
there are several patches in this branch that each do this for
one file.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 7c10ddf874 ("Merge branch 'drm-uapi-extern-c-fixes' of https://github.com/evelikov/linux into drm-next")
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2016-05-24 14:12:48 +10:00
Kieran Bingham b3b0842985 scripts/gdb: decode bytestream on dmesg for Python3
The recent fixes to lx-dmesg, now allow the command to print
successfully on Python3, however the python interpreter wraps the bytes
for each line with a b'<text>' marker.

To remove this, we need to decode the line, where .decode() will default
to 'UTF-8'

Link: http://lkml.kernel.org/r/d67ccf93f2479c94cb3399262b9b796e0dbefcf2.1462865983.git.jan.kiszka@siemens.com
Signed-off-by: Kieran Bingham <kieran@bingham.xyz>
Acked-by: Dom Cote <buzdelabuz2@gmail.com>
Tested-by: Dom Cote <buzdelabuz2@gmail.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23 17:04:14 -07:00
Dom Cote d21d5b9eb0 scripts/gdb: fix issue with dmesg.py and python 3.X
When built against Python 3, GDB differs in the return type for its
read_memory function, causing the lx-dmesg command to fail.

Now that we have an improved read_16() we can use the new
read_memoryview() abstraction to make lx-dmesg return valid data on both
current Python APIs

Tested with python 3.4 and 2.7
Tested with gdb 7.7

Link: http://lkml.kernel.org/r/28477b727ff7fe3101fd4e426060e8a68317a639.1462865983.git.jan.kiszka@siemens.com
Signed-off-by: Dom Cote <buzdelabuz2+git@gmail.com>
[kieran@bingham.xyz: Adjusted commit log to better reflect code changes]
Tested-by: Kieran Bingham <kieran@bingham.xyz> (Py2.7,Py3.4,GDB10)
Signed-off-by: Kieran Bingham <kieran@bingham.xyz>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23 17:04:14 -07:00
Dom Cote 321958d971 scripts/gdb: improve types abstraction for gdb python scripts
Change the read_u16 function so it accepts both 'str' and 'byte' as type
for the arguments.

When calling read_memory() from gdb API, depending on if it was built
with 2.7 or 3.X, the format used to return the data will differ ( 'str'
for 2.7, and 'byte' for 3.X ).

Add a function read_memoryview() to be able to get a 'memoryview' object
back from read_memory() both with python 2.7 and 3.X .

Tested with python 3.4 and 2.7
Tested with gdb 7.7

Link: http://lkml.kernel.org/r/73621f564503137a002a639d174e4fb35f73f462.1462865983.git.jan.kiszka@siemens.com
Signed-off-by: Dom Cote <buzdelabuz2+git@gmail.com>
Tested-by: Kieran Bingham <kieran@bingham.xyz> (Py2.7,Py3.4,GDB10)
Signed-off-by: Kieran Bingham <kieran@bingham.xyz>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23 17:04:14 -07:00
Kieran Bingham 9f66dee720 scripts/gdb: add lx_thread_info_by_pid helper
The tasks module already provides helpers to find the task struct by
pid, and the thread_info by task struct; however this is cumbersome to
utilise on the gdb commandline.

Wrap these two functionalities together in an extra single helper to
allow exploring the thread info, from a PID value

Link: http://lkml.kernel.org/r/dadc5667f053ec811eb3e3033d99d937fedbc93b.1462865983.git.jan.kiszka@siemens.com
Signed-off-by: Kieran Bingham <kieran.bingham@linaro.org>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23 17:04:14 -07:00
Kieran Bingham e127a73d41 scripts/gdb: add a Radix Tree Parser
Linux makes use of the Radix Tree data structure to store pointers
indexed by integer values.  This structure is utilised across many
structures in the kernel including the IRQ descriptor tables, and
several filesystems.

This module provides a method to lookup values from a structure given
its head node.

Usage:

The function lx_radix_tree_lookup, must be given a symbol of type struct
radix_tree_root, and an index into that tree.

The object returned is a generic integer value, and must be cast
correctly to the type based on the storage in the data structure.

For example, to print the irq descriptor in the sparse irq_desc_tree at
index 18, try the following:

 (gdb) print (struct irq_desc)$lx_radix_tree_lookup(irq_desc_tree, 18)

Link: http://lkml.kernel.org/r/d2028c55e50cf95a9b7f8ca0d11885174b0cc709.1462865983.git.jan.kiszka@siemens.com
Signed-off-by: Kieran Bingham <kieran.bingham@linaro.org>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23 17:04:14 -07:00
Jan Kiszka 4bc393dbcf scripts/gdb: cast CPU numbers to integer
We won't see more than 2 billion CPUs any time soon, and having cpu_list
return long makes the output of lx-cpus a bit ugly.

Link: http://lkml.kernel.org/r/dcb45c3b0a59e0fd321fa56ff7aa398458c689b3.1462865983.git.jan.kiszka@siemens.com
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23 17:04:14 -07:00
Kieran Bingham b1503934a5 scripts/gdb: add cpu iterators
The linux kernel provides macro's for iterating against values from the
cpu_list masks.  By providing some commonly used masks, we can mirror
the kernels helper macros with easy to use generators.

Link: http://lkml.kernel.org/r/d045c6599771ada1999d49612ee30fd2f9acf17f.1462865983.git.jan.kiszka@siemens.com
Signed-off-by: Kieran Bingham <kieran.bingham@linaro.org>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23 17:04:14 -07:00
Kieran Bingham c1a153992e scripts/gdb: add mount point list command
lx-mounts will identify current mount points based on the 'init_task'
namespace by default, as we do not yet have a kernel thread list
implementation to select the current running thread.

Optionally, a user can specify a PID to list from that process'
namespace

Link: http://lkml.kernel.org/r/e614c7bc32d2350b4ff1627ec761a7148e65bfe6.1462865983.git.jan.kiszka@siemens.com
Signed-off-by: Kieran Bingham <kieran.bingham@linaro.org>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23 17:04:14 -07:00
Kieran Bingham e7165a2d7d scripts/gdb: add io resource readers
Provide iomem_resource and ioports_resource printers and command hooks

It can be quite interesting to halt the kernel as it's booting and check
to see this list as it is being populated.

It should be useful in the event that a kernel is not booting, you can
identify what memory resources have been registered

Link: http://lkml.kernel.org/r/f0a6b9fa9c92af4d7ed2e7343ccc84150e9c6fc5.1462865983.git.jan.kiszka@siemens.com
Signed-off-by: Kieran Bingham <kieran.bingham@linaro.org>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23 17:04:14 -07:00
Kieran Bingham 74627cf2df scripts/gdb: provide a dentry_name VFS path helper
Walk the VFS entries, pre-pending the iname strings to generate a full
VFS path name from a dentry.

Link: http://lkml.kernel.org/r/4328fdb2d15ba7f1b21ad21c2eecc38d9cfc4d13.1462865983.git.jan.kiszka@siemens.com
Signed-off-by: Kieran Bingham <kieran.bingham@linaro.org>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23 17:04:14 -07:00
Kieran Bingham 958ef8a09a scripts/gdb: support !CONFIG_MODULES gracefully
If CONFIG_MODULES is not enabled, lx-lsmod tries to find a non-existent
symbol and generates an unfriendly traceback:

  (gdb) lx-lsmod
  Address    Module                  Size  Used by
  Traceback (most recent call last):
    File "scripts/gdb/linux/modules.py", line 75, in invoke
      for module in module_list():
    File "scripts/gdb/linux/modules.py", line 24, in module_list
      module_ptr_type = module_type.get_type().pointer()
    File "scripts/gdb/linux/utils.py", line 28, in get_type
      self._type = gdb.lookup_type(self._name)
  gdb.error: No struct type named module.
  Error occurred in Python command: No struct type named module.

Catch the error and return an empty module_list() for a clean command
output as follows:

  (gdb) lx-lsmod
  Address    Module                  Size  Used by
  (gdb)

Link: http://lkml.kernel.org/r/94d533819437408b85ae5864f939dd7ca6fbfcd6.1462865983.git.jan.kiszka@siemens.com
Signed-off-by: Kieran Bingham <kieran.bingham@linaro.org>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23 17:04:14 -07:00
Kieran Bingham e78f3d70b3 scripts/gdb: provide exception catching parser
If we attempt to read a value that is not available to GDB, an exception
is raised.  Most of the time, this is a good thing; however on occasion
we will want to be able to determine if a symbol is available.

By catching the exception to simply return None, we can determine if we
tried to read an invalid value, without the exception taking our
execution context away from us

Link: http://lkml.kernel.org/r/c72b25c06fc66e1d68371154097e2cbb112555d8.1462865983.git.jan.kiszka@siemens.com
Signed-off-by: Kieran Bingham <kieran.bingham@linaro.org>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23 17:04:14 -07:00
Kieran Bingham 619ccaf3e9 scripts/gdb: convert modules usage to lists functions
Simplify the module list functions with the new list_for_each_entry
abstractions

Link: http://lkml.kernel.org/r/ad0101c9391088608166fcec26af179868973d86.1462865983.git.jan.kiszka@siemens.com
Signed-off-by: Kieran Bingham <kieran.bingham@linaro.org>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23 17:04:14 -07:00
Kieran Bingham a84be61d0e scripts/gdb: provide kernel list item generators
Facilitate linked-list items by providing a generator to return the
dereferenced, and type-cast objects from a kernel linked list

Link: http://lkml.kernel.org/r/2b0998564e6e5abe53585d466f87e491331fd2a4.1462865983.git.jan.kiszka@siemens.com
Signed-off-by: Kieran Bingham <kieran.bingham@linaro.org>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23 17:04:14 -07:00
Kieran Bingham f197d75fca scripts/gdb: provide linux constants
Some macro's and defines are needed when parsing memory, and without
compiling the kernel as -g3 they are not available in the debug-symbols.

We use the pre-processor here to extract constants to a dedicated module
for the linux debugger extensions

Top level Kbuild is used to call in and generate the constants file,
while maintaining dependencies on autogenerated files in
include/generated

Link: http://lkml.kernel.org/r/bc3df9c25f57ea72177c066a51a446fc19e2c27f.1462865983.git.jan.kiszka@siemens.com
Signed-off-by: Kieran Bingham <kieran.bingham@linaro.org>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Michal Marek <mmarek@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23 17:04:14 -07:00
Jan Kiszka 0c22fde8b0 scripts/gdb: Adjust module reference counter reported by lx-lsmod
This takes the MODULE_REF_BASE into account.

Link: http://lkml.kernel.org/r/d926d2d54caa034adb964b52215090cbdb875249.1462865983.git.jan.kiszka@siemens.com
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23 17:04:14 -07:00
Linus Torvalds 5469dc270c Merge branch 'akpm' (patches from Andrew)
Merge more updates from Andrew Morton:

 - the rest of MM

 - KASAN updates

 - procfs updates

 - exit, fork updates

 - printk updates

 - lib/ updates

 - radix-tree testsuite updates

 - checkpatch updates

 - kprobes updates

 - a few other misc bits

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (162 commits)
  samples/kprobes: print out the symbol name for the hooks
  samples/kprobes: add a new module parameter
  kprobes: add the "tls" argument for j_do_fork
  init/main.c: simplify initcall_blacklisted()
  fs/efs/super.c: fix return value
  checkpatch: improve --git <commit-count> shortcut
  checkpatch: reduce number of `git log` calls with --git
  checkpatch: add support to check already applied git commits
  checkpatch: add --list-types to show message types to show or ignore
  checkpatch: advertise the --fix and --fix-inplace options more
  checkpatch: whine about ACCESS_ONCE
  checkpatch: add test for keywords not starting on tabstops
  checkpatch: improve CONSTANT_COMPARISON test for structure members
  checkpatch: add PREFER_IS_ENABLED test
  lib/GCD.c: use binary GCD algorithm instead of Euclidean
  radix-tree: free up the bottom bit of exceptional entries for reuse
  dax: move RADIX_DAX_ definitions to dax.c
  radix-tree: make radix_tree_descend() more useful
  radix-tree: introduce radix_tree_replace_clear_tags()
  radix-tree: tidy up __radix_tree_create()
  ...
2016-05-20 22:31:33 -07:00
Linus Torvalds 3aa2fc1667 driver core update for 4.7-rc1
Here's the "big" driver core update for 4.7-rc1.
 
 Mostly just debugfs changes, the long-known and messy races with removing
 debugfs files should be fixed thanks to the great work of Nicolai Stange.  We
 also have some isa updates in here (the x86 maintainers told me to take it
 through this tree), a new warning when we run out of dynamic char major
 numbers, and a few other assorted changes, details in the shortlog.
 
 All have been in linux-next for some time with no reported issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core updates from Greg KH:
 "Here's the "big" driver core update for 4.7-rc1.

  Mostly just debugfs changes, the long-known and messy races with
  removing debugfs files should be fixed thanks to the great work of
  Nicolai Stange.  We also have some isa updates in here (the x86
  maintainers told me to take it through this tree), a new warning when
  we run out of dynamic char major numbers, and a few other assorted
  changes, details in the shortlog.

  All have been in linux-next for some time with no reported issues"

* tag 'driver-core-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (32 commits)
  Revert "base: dd: don't remove driver_data in -EPROBE_DEFER case"
  gpio: ws16c48: Utilize the ISA bus driver
  gpio: 104-idio-16: Utilize the ISA bus driver
  gpio: 104-idi-48: Utilize the ISA bus driver
  gpio: 104-dio-48e: Utilize the ISA bus driver
  watchdog: ebc-c384_wdt: Utilize the ISA bus driver
  iio: stx104: Utilize the module_isa_driver and max_num_isa_dev macros
  iio: stx104: Add X86 dependency to STX104 Kconfig option
  Documentation: Add ISA bus driver documentation
  isa: Implement the max_num_isa_dev macro
  isa: Implement the module_isa_driver macro
  pnp: pnpbios: Add explicit X86_32 dependency to PNPBIOS
  isa: Decouple X86_32 dependency from the ISA Kconfig option
  driver-core: use 'dev' argument in dev_dbg_ratelimited stub
  base: dd: don't remove driver_data in -EPROBE_DEFER case
  kernfs: Move faulting copy_user operations outside of the mutex
  devcoredump: add scatterlist support
  debugfs: unproxify files created through debugfs_create_u32_array()
  debugfs: unproxify files created through debugfs_create_blob()
  debugfs: unproxify files created through debugfs_create_bool()
  ...
2016-05-20 21:26:15 -07:00
Linus Torvalds 5af2344013 Char / Misc driver update for 4.7-rc1
Here's the big char and misc driver update for 4.7-rc1.
 
 Lots of different tiny driver subsystems have updates here with new
 drivers and functionality.  Details in the shortlog.
 
 All have been in linux-next with no reported issues for a while.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char / misc driver updates from Greg KH:
 "Here's the big char and misc driver update for 4.7-rc1.

  Lots of different tiny driver subsystems have updates here with new
  drivers and functionality.  Details in the shortlog.

  All have been in linux-next with no reported issues for a while"

* tag 'char-misc-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (125 commits)
  mcb: Delete num_cells variable which is not required
  mcb: Fixed bar number assignment for the gdd
  mcb: Replace ioremap and request_region with the devm version
  mcb: Implement bus->dev.release callback
  mcb: export bus information via sysfs
  mcb: Correctly initialize the bus's device
  mei: bus: call mei_cl_read_start under device lock
  coresight: etb10: adjust read pointer only when needed
  coresight: configuring ETF in FIFO mode when acting as link
  coresight: tmc: implementing TMC-ETF AUX space API
  coresight: moving struct cs_buffers to header file
  coresight: tmc: keep track of memory width
  coresight: tmc: make sysFS and Perf mode mutually exclusive
  coresight: tmc: dump system memory content only when needed
  coresight: tmc: adding mode of operation for link/sinks
  coresight: tmc: getting rid of multiple read access
  coresight: tmc: allocating memory when needed
  coresight: tmc: making prepare/unprepare functions generic
  coresight: tmc: splitting driver in ETB/ETF and ETR components
  coresight: tmc: cleaning up header file
  ...
2016-05-20 21:20:31 -07:00
Joe Perches 28898fd1a8 checkpatch: improve --git <commit-count> shortcut
The --git <commit-count> shortcut can be confused by a tag with a dash
like v4.4-rc1.

Improve the test to verify the <commit-count> expression ends with a
dash followed by a numeric value.

Improve the git log result to verify the "<sha1> <subject>" output
as well.

Link: http://lkml.kernel.org/r/c4a3f759291d967641860c3a54bb81177f34325f.1462711962.git.joe@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-20 17:58:30 -07:00
Joe Perches 0dea9f1eef checkpatch: reduce number of `git log` calls with --git
checkpatch currently calls git log multiple times to first get the
<revision range> sha1 values and again to get the subject for each
individual sha1 commit.

Always get the sha1 and subject at the same time instead.  Store the
subject in a sha1 hash to avoid the second git log exec.

Link: http://lkml.kernel.org/r/274efab2332ad2308ab5de85a95d255f6e2de5f3.1462711962.git.joe@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-20 17:58:30 -07:00
Du, Changbin 4a593c3448 checkpatch: add support to check already applied git commits
It's sometimes useful to scan already committed patches.

Add --git <revision range> to scan specific or multiple commits.

Single commits are scanned with
	--git <rev>
Multiple commits are scanned with
	--git <range>
	--git <commit>-<count>

[joe@perches.com:
o Don't exec git for each <commit>-<count>,
  use a single "git log -<count> <commit>"
o Consolidate the git exec for the <range> and <commit>-<count> variants
o Output 12 character commit hash ids
o Don't scan git commit merges
o Use -M to reduce the size of rename commits]

Signed-off-by: "Du, Changbin" <changbin.du@intel.com>
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-20 17:58:30 -07:00
Joe Perches 3beb42eced checkpatch: add --list-types to show message types to show or ignore
The message types are not currently knowable without reading the code.
Add a mechanism to see what they are.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-20 17:58:30 -07:00
Joe Perches ef21219636 checkpatch: advertise the --fix and --fix-inplace options more
The --fix option is relatively unknown and underutilized.

Add some text to show that it's available when style defects are found.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-20 17:58:30 -07:00
Joe Perches 481aea5c59 checkpatch: whine about ACCESS_ONCE
Add a test for use of ACCESS_ONCE that could be written using READ_ONCE or
WRITE_ONCE.

--fix it too if desired.

The WRITE_ONCE fixes are less correct than the coccinelle script below as
checkpatch cannot have a completely correct "expression" mechanism because
checkpatch works on patches and not complete files.

$ cat access_once.cocci
@@
expression e1;
expression e2;
@@

-       ACCESS_ONCE(e1) = e2
+       WRITE_ONCE(e1, e2)

@@
expression e1;
@@

-       ACCESS_ONCE(e1)
+       READ_ONCE(e1)

Signed-off-by: Joe Perches <joe@perches.com>
Cc: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-20 17:58:30 -07:00
Joe Perches a91e8994f2 checkpatch: add test for keywords not starting on tabstops
It's somewhat common and in general a defect for c90 keywords to
not start on a tabstop.

Add a test for this condition and warn when it occurs.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-20 17:58:30 -07:00
Joe Perches f39e1769bb checkpatch: improve CONSTANT_COMPARISON test for structure members
A "." dereference to an all uppercase structure member can be
incorrectly reported as a CONSTANT_COMPARISON.

ie: "if (table[i].PANELID == tempdx)"

Fix it by checking for "." before the constant test.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-20 17:58:30 -07:00
Joe Perches 2d6327459e checkpatch: add PREFER_IS_ENABLED test
Using #if defined CONFIG_<FOO> || defined CONFIG_<FOO>_MODULE is
more verbose than necessary and IS_ENABLED(CONFIG_<FOO>) is preferred.

So add a test and a message for it.

--fix it to if desired.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-20 17:58:30 -07:00
Linus Torvalds e7f44b65b5 Devicetree for 4.7:
- Rewrite of the unflattening code to avoid recursion and lessen the
   stack usage.
 
 - Rewrite of the phandle args parsing code to get rid of the fixed args
   size. This is needed for IOMMU code.
 
 - Sync to latest dtc which adds more dts style checking. These warnings
   are enabled with "W=1" compiles.
 
 - Tegra documentation updates related to the above warnings.
 
 - A bunch of spelling and other doc fixes.
 
 - Various vendor prefix additions.
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Merge tag 'devicetree-for-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux

Pull devicetree updates from Rob Herring:

 - Rewrite of the unflattening code to avoid recursion and lessen the
   stack usage.

 - Rewrite of the phandle args parsing code to get rid of the fixed args
   size.  This is needed for IOMMU code.

 - Sync to latest dtc which adds more dts style checking.  These
   warnings are enabled with "W=1" compiles.

 - Tegra documentation updates related to the above warnings.

 - A bunch of spelling and other doc fixes.

 - Various vendor prefix additions.

* tag 'devicetree-for-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (52 commits)
  devicetree: Add Creative Technology vendor id
  gpio: dt-bindings: add ibm,ppc4xx-gpio binding
  of/unittest: Remove unnecessary module.h header inclusion
  drivers/of: Fix build warning in populate_node()
  drivers/of: Fix depth when unflattening devicetree
  of: dynamic: changeset prop-update revert fix
  drivers/of: Export of_detach_node()
  drivers/of: Return allocated memory from of_fdt_unflatten_tree()
  drivers/of: Specify parent node in of_fdt_unflatten_tree()
  drivers/of: Rename unflatten_dt_node()
  drivers/of: Avoid recursively calling unflatten_dt_node()
  drivers/of: Split unflatten_dt_node()
  of: include errno.h in of_graph.h
  of: document refcount incrementation of of_get_cpu_node()
  Documentation: dt: soc: fix spelling mistakes
  Documentation: dt: power: fix spelling mistake
  Documentation: dt: pinctrl: fix spelling mistake
  Documentation: dt: opp: fix spelling mistake
  Documentation: dt: net: fix spelling mistakes
  Documentation: dt: mtd: fix spelling mistake
  ...
2016-05-20 14:51:34 -07:00
Linus Torvalds a1c28b75a9 Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm
Pull ARM updates from Russell King:
 "Changes included in this pull request:

   - revert pxa2xx-flash back to using ioremap_cached() and switch
     memremap() to use arch_memremap_wb()

   - remove pci=firmware command line argument handling

   - remove unnecessary arm_dma_set_mask() implementation, the generic
     implementation will do for ARM

   - removal of the ARM kallsyms "hack" to work around mode switching
     veneers and vectors located below PAGE_OFFSET

   - tidy up build system output a little

   - add L2 cache power management DT bindings

   - remove duplicated local_irq_disable() in reboot paths

   - handle AMBA primecell devices better at registration time with PM
     domains (needed for Samsung SoCs)

   - ARM specific preparation to support Keystone II kexec"

* 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: 8567/1: cache-uniphier: activate ways for secondary CPUs
  ARM: 8570/2: Documentation: devicetree: Add PL310 PM bindings
  ARM: 8569/1: pl2x0: Add OF control of cache power management
  ARM: 8568/1: reboot: remove duplicated local_irq_disable()
  ARM: 8566/1: drivers: amba: properly handle devices with power domains
  ARM: provide arm_has_idmap_alias() helper
  ARM: kexec: remove 512MB restriction on kexec crashdump
  ARM: provide improved virt_to_idmap() functionality
  ARM: kexec: fix crashkernel= handling
  ARM: 8557/1: specify install, zinstall, and uinstall as PHONY targets
  ARM: 8562/1: suppress "include/generated/mach-types.h is up to date."
  ARM: 8553/1: kallsyms: remove --page-offset command line option
  ARM: 8552/1: kallsyms: remove special lower address limit for CONFIG_ARM
  ARM: 8555/1: kallsyms: ignore ARM mode switching veneers
  ARM: 8548/1: dma-mapping: remove arm_dma_set_mask()
  ARM: 8554/1: kernel: pci: remove pci=firmware command line parameter handling
  ARM: memremap: implement arch_memremap_wb()
  memremap: add arch specific hook for MEMREMAP_WB mappings
  mtd: pxa2xx-flash: switch back from memremap to ioremap_cached
  ARM: reintroduce ioremap_cached() for creating cached I/O mappings
2016-05-20 10:01:38 -07:00
Linus Torvalds a05a70db34 Merge branch 'akpm' (patches from Andrew)
Merge updates from Andrew Morton:

 - fsnotify fix

 - poll() timeout fix

 - a few scripts/ tweaks

 - debugobjects updates

 - the (small) ocfs2 queue

 - Minor fixes to kernel/padata.c

 - Maybe half of the MM queue

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (117 commits)
  mm, page_alloc: restore the original nodemask if the fast path allocation failed
  mm, page_alloc: uninline the bad page part of check_new_page()
  mm, page_alloc: don't duplicate code in free_pcp_prepare
  mm, page_alloc: defer debugging checks of pages allocated from the PCP
  mm, page_alloc: defer debugging checks of freed pages until a PCP drain
  cpuset: use static key better and convert to new API
  mm, page_alloc: inline pageblock lookup in page free fast paths
  mm, page_alloc: remove unnecessary variable from free_pcppages_bulk
  mm, page_alloc: pull out side effects from free_pages_check
  mm, page_alloc: un-inline the bad part of free_pages_check
  mm, page_alloc: check multiple page fields with a single branch
  mm, page_alloc: remove field from alloc_context
  mm, page_alloc: avoid looking up the first zone in a zonelist twice
  mm, page_alloc: shortcut watermark checks for order-0 pages
  mm, page_alloc: reduce cost of fair zone allocation policy retry
  mm, page_alloc: shorten the page allocator fast path
  mm, page_alloc: check once if a zone has isolated pageblocks
  mm, page_alloc: move __GFP_HARDWALL modifications out of the fastpath
  mm, page_alloc: simplify last cpupid reset
  mm, page_alloc: remove unnecessary initialisation from __alloc_pages_nodemask()
  ...
2016-05-19 20:00:06 -07:00
Vineet Gupta b21e91c305 scripts/bloat-o-meter: print percent change
This adds an additional line of output (to reduce the chances of
breaking any existing output parsers) which prints the total size before
and after and the relative difference.

  add/remove: 39/0 grow/shrink: 12408/55 up/down: 362227/-1430 (360797)
  function                                     old     new   delta
  ext4_fill_super                            10556   12590   +2034
  _fpadd_parts                                   -    1186   +1186
  ntfs_fill_super                             5340    6164    +824
  ...
  ...
  __divdf3                                     752     386    -366
  unlzma                                      3682    3274    -408
  Total: Before=5023101, After=5383898, chg 7.000000%
  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Link: http://lkml.kernel.org/r/1463124110-30314-1-git-send-email-vgupta@synopsys.com
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Cc: Josh Triplett <josh@joshtriplett.org>
Cc: Michal Marek <mmarek@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-19 19:12:14 -07:00
Kees Cook bad7de742d scripts/spelling.txt: add "fimware" misspelling
A few instances of "fimware" instead of "firmware" were found.  Fix
these and add it to the spelling.txt file.

Signed-off-by: Kees Cook <keescook@chromium.org>
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-19 19:12:14 -07:00
Konstantin Khlebnikov 310c6dd06a scripts/decode_stacktrace.sh: handle symbols in modules
scripts/decode_stacktrace.sh presently displays module symbols as

	func+0x0ff/0x5153 [module]

Add a third argument: the pathname of a directory where the script
should look for the file module.ko so that the output appears as

	func (foo/bar.c:123) module

Without the argument or if the module file isn't found the script prints
such symbols as is without decoding.

Signed-off-by: Konstantin Khlebnikov <koct9i@gmail.com>
Cc: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-19 19:12:14 -07:00
Linus Torvalds e9ad9b9bd3 The most interesting thing (IMO) this time around is some beginning
infrastructural work to allow documents to be written using restructured
 text.  Maybe someday, in a galaxy far far away, we'll be able to eliminate
 the DocBook dependency and have a much better integrated set of kernel
 docs.  Someday.
 
 Beyond that, there's a new document on security hardening from Kees, the
 movement of some sample code over to samples/, a number of improvements to
 the serial docs from Geert, and the usual collection of corrections, typo
 fixes, etc.
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Merge tag 'docs-for-linus' of git://git.lwn.net/linux

Pull Documentation updates from Jon Corbet:
 "A bit busier this time around.

  The most interesting thing (IMO) this time around is some beginning
  infrastructural work to allow documents to be written using
  restructured text.  Maybe someday, in a galaxy far far away, we'll be
  able to eliminate the DocBook dependency and have a much better
  integrated set of kernel docs.  Someday.

  Beyond that, there's a new document on security hardening from Kees,
  the movement of some sample code over to samples/, a number of
  improvements to the serial docs from Geert, and the usual collection
  of corrections, typo fixes, etc"

* tag 'docs-for-linus' of git://git.lwn.net/linux: (55 commits)
  doc: self-protection: provide initial details
  serial: doc: Use port->state instead of info
  serial: doc: Always refer to tty_port->mutex
  Documentation: vm: Spelling s/paltform/platform/g
  Documentation/memcg: update kmem limit doc as codes behavior
  docproc: print a comment about autogeneration for rst output
  docproc: add support for reStructuredText format via --rst option
  docproc: abstract terminating lines at first space
  docproc: abstract docproc directive detection
  docproc: reduce unnecessary indentation
  docproc: add variables for subcommand and filename
  kernel-doc: use rst C domain directives and references for types
  kernel-doc: produce RestructuredText output
  kernel-doc: rewrite usage description, remove duplicated comments
  Doc: correct the location of sysrq.c
  Documentation: fix common spelling mistakes
  samples: v4l: from Documentation to samples directory
  samples: connector: from Documentation to samples directory
  Documentation: xillybus: fix spelling mistake
  Documentation: x86: fix spelling mistakes
  ...
2016-05-19 18:07:25 -07:00
Linus Torvalds ec67b14c1b Benjamin Poirier added some minor fixes and clean ups to localmodconfig.
One is a fix for making sure that module signing still works when
 coming from a different environment. If original keys are not found it
 will warn and reset the keys to their default value.
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Merge tag 'localmodconfig-v4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-kconfig

Pull localmodconfig updates from Steven Rostedt.
 "Benjamin Poirier added some minor fixes and clean ups to
  localmodconfig.

  One is a fix for making sure that module signing still works when
  coming from a different environment.  If original keys are not found
  it will warn and reset the keys to their default value"

* tag 'localmodconfig-v4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-kconfig:
  localmodconfig: Fix whitespace repeat count after "tristate"
  localmodconfig: Reset certificate paths
  localmodconfig: Add missing $ to reference a variable
  localmodconfig: Fix parsing of "help" text
  localmodconfig: Recognize more keywords that end a menu entry
  localmodconfig: Fix parsing of Kconfig "source" statements
2016-05-19 11:36:26 -07:00
Kees Cook 2552a39fac coccicheck: Fix missing 0 index in kill loop
By default, "seq" counts from 1, but processes were starting counting
from 0, so when interrupted, coccicheck would leave the 0th process
running.

Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Nicolas Palix <nicolas.palix@imag.fr>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-05-19 09:56:59 +02:00
Srinivas Pandruvada 65a9f31c50 scripts/package/Makefile: rpmbuild add support of RPMOPTS
After commit 21a59991ce ("scripts/package/Makefile: rpmbuild is needed
for rpm targets"), it is no longer possible to specify RPMOPTS.
For example, we can no longer able to control _topdir using the following
make command.
make RPMOPTS="--define '_topdir /home/xyz/workspace/'" binrpm-pkg

Fixes: 21a59991ce ("scripts/package/Makefile: rpmbuild is needed for rpm targets")
Cc: <stable@vger.kernel.org> # 4.3+
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-05-16 14:01:48 +02:00
Jani Nikula 0e95abf9be docproc: print a comment about autogeneration for rst output
Leave a hint to folks which file to edit instead.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-05-14 09:56:56 -06:00
Jani Nikula 064669b43b docproc: add support for reStructuredText format via --rst option
Expect reStructuredText input and have kernel-doc produce
reStructuredText output with the new --rst option. Also add --docbook
option for completeness. If no option is given, default to
reStructuredText if the input file has ".rst" extension, DocBook
otherwise.

Directives for reStructuredText use .. ! instead of just !, to make them
reStructuredText comments.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-05-14 09:56:53 -06:00
Jani Nikula 1dcdad0aac docproc: abstract terminating lines at first space
Cleaner code. Also fixes a bug when F or P directives didn't in fact
have space.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-05-14 09:56:49 -06:00
Jani Nikula a48dc45e9c docproc: abstract docproc directive detection
Helps follow-up work. No functional changes.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-05-14 09:56:45 -06:00
Jani Nikula 868fb19212 docproc: reduce unnecessary indentation
Improves clarity. No functional changes.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-05-14 09:56:41 -06:00
Jani Nikula 568fb2dec9 docproc: add variables for subcommand and filename
Improves clarity. No functional changes.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-05-14 09:56:37 -06:00
Jani Nikula 6285097654 kernel-doc: use rst C domain directives and references for types
First, the headings for structs, enums and typedefs will be similar to
functions. Second, this provides a kind of namespace for cross
references. Third, and most importantly, the return and parameter types
from .. c:function:: definitions will automagically become cross
references to the documented types.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-05-14 09:56:34 -06:00
Jonathan Corbet c0d1b6ee78 kernel-doc: produce RestructuredText output
If given the -rst flag, output will now be in RestructuredText.  Various
glitches to be worked out yet.

In the end I decided not to use RST section headings within the kerneldoc
comments.  gpu.tmpl already has headings five levels deep; adding more is
not going to bring clarity.

This is really just Jani Nikula's asciidoc change with the serial numbers
filed off.  It's a hack job that doubtless needs a lot of cleaning up.

Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-05-14 09:56:30 -06:00
Jani Nikula fadc0b31cb kernel-doc: rewrite usage description, remove duplicated comments
Instead of having the kernel-doc usage in both comments and in output to
the user, merge them all to one here document. While at it, imrove the
text and make it pretty. Give shoemaker's children some shoes.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-05-14 09:56:25 -06:00
Maciej W. Rozycki 0d61ed17dd ld-version: Drop the 4th and 5th version components
... making upstream development binutils snapshots work as expected,
e.g.:

$ mips64el-linux-ld --version
GNU ld (GNU Binutils) 2.20.1.20100303
[...]
$

Signed-off-by: Maciej W. Rozycki <macro@imgtec.com>
Acked-by: Michal Marek <mmarek@suse.cz>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: linux-kbuild@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/12537/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-05-13 14:02:05 +02:00
Arnd Bergmann c9c6837d39 kbuild: move -Wunused-const-variable to W=1 warning level
gcc-6 started warning by default about variables that are not
used anywhere and that are marked 'const', generating many
false positives in an allmodconfig build, e.g.:

arch/arm/mach-davinci/board-da830-evm.c:282:20: warning: 'da830_evm_emif25_pins' defined but not used [-Wunused-const-variable=]
arch/arm/plat-omap/dmtimer.c:958:34: warning: 'omap_timer_match' defined but not used [-Wunused-const-variable=]
drivers/bluetooth/hci_bcm.c:625:39: warning: 'acpi_bcm_default_gpios' defined but not used [-Wunused-const-variable=]
drivers/char/hw_random/omap-rng.c:92:18: warning: 'reg_map_omap4' defined but not used [-Wunused-const-variable=]
drivers/devfreq/exynos/exynos5_bus.c:381:32: warning: 'exynos5_busfreq_int_pm' defined but not used [-Wunused-const-variable=]
drivers/dma/mv_xor.c:1139:34: warning: 'mv_xor_dt_ids' defined but not used [-Wunused-const-variable=]

This is similar to the existing -Wunused-but-set-variable warning
that was added in an earlier release and that we disable by default
now and only enable when W=1 is set, so it makes sense to do
the same here. Once we have eliminated the majority of the
warnings for both, we can put them back into the default list.

We probably want this in backport kernels as well, to allow building
them with gcc-6 without introducing extra warnings.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Lee Jones <lee.jones@linaro.org>
Cc: stable@vger.kernel.org
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-05-11 13:05:40 +02:00
Masahiro Yamada 9c8fa9bc08 kbuild: fix if_change and friends to consider argument order
Currently, arg-check is implemented as follows:

  arg-check = $(strip $(filter-out $(cmd_$(1)), $(cmd_$@)) \
                      $(filter-out $(cmd_$@),   $(cmd_$(1))) )

This does not care about the order of arguments that appear in
$(cmd_$(1)) and $(cmd_$@).  So, if_changed and friends never rebuild
the target if only the argument order is changed.  This is a problem
when the link order is changed.

Apparently,

  obj-y += foo.o
  obj-y += bar.o

and

  obj-y += bar.o
  obj-y += foo.o

should be distinguished because the link order determines the probe
order of drivers.  So, built-in.o should be rebuilt when the order
of objects is changed.

This commit fixes arg-check to compare the old/current commands
including the argument order.

Of course, this change has a side effect; Kbuild will react to the
change of compile option order.  For example, "-DFOO -DBAR" and
"-DBAR -DFOO" should give no difference to the build result, but
false positive should be better than false negative.

I am moving space_escape to the top of Kbuild.include just for a
matter of preference.  In practical terms, space_escape can be
defined after arg-check because arg-check uses "=" flavor, not ":=".
Having said that, collecting convenient variables in one place makes
sense from the point of readability.

Chaining "%%%SPACE%%%" to "_-_SPACE_-_" is also a matter of taste
at this point.  Actually, it can be arbitrary as long as it is an
unlikely used string.  The only problem I see in "%%%SPACE%%%" is
that "%" is a special character in "$(patsubst ...)" context.  This
commit just uses "$(subst ...)" for arg-check, but I am fixing it now
in case we might want to use it in $(patsubst ...) context in the
future.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-05-10 21:21:14 +02:00
Dirk Gouders fa64e5f6a3 kconfig/symbol.c: handle choice_values that depend on 'm' symbols
If choices consist of choice_values of type tristate that depend on
symbols set to 'm', those choice_values are not set to 'n' if the
choice is changed from 'm' to 'y' (in which case only one active
choice_value is allowed). Those values are also written to the config
file causing modules to be built when they should not.

The following config can be used to reproduce and examine the problem;
with the frontend of your choice set "Choice 0" and "Choice 1" to 'm',
then set "Tristate Choice" to 'y' and save the configuration:

config modules
	boolean modules
	default y
	option modules

config dependency
	tristate "Dependency"
	default m

choice
	prompt "Tristate Choice"
	default choice0

config choice0
	tristate "Choice 0"

config choice1
	tristate "Choice 1"
	depends on dependency

endchoice

This patch sets tristate choice_values' visibility that depend on
symbols set to 'm' to 'n' if the corresponding choice is set to 'y'.

This makes them disappear from the choice list and will also cause the
choice_values' value set to 'n' in sym_calc_value() and as a result
they are written as "not set" to the resulting .config file.

Reported-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Dirk Gouders <dirk@gouders.net>
Tested-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Tested-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-05-10 21:14:27 +02:00
Azriel Samson 962475ac2f builddeb: fix missing headers in linux-headers package
The kernel headers package (linux-headers) doesn't include
header files from other architectures required to build
out-of-tree modules.

For e.g. on ARM64, opcodes.h includes the same file from ARM
which causes the following error:
./arch/arm64/include/asm/opcodes.h:1:43: fatal error:
../../arm/include/asm/opcodes.h: No such file or directory
compilation terminated.

Signed-off-by: Azriel Samson <asamson@codeaurora.org>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-05-10 17:44:53 +02:00
Bjørn Mork 697bbc7b83 builddeb: include objtool binary in headers package
"objtool" is required for building external m dules if "Compile-time
stack metadata validation" is enabled.  Otherwise all builds based
on the headers package fail with:

 make[1]: Entering directory '/usr/src/linux-headers-4.6.0-rc6'
 make[2]: *** No rule to make target 'tools/objtool/objtool', needed by 'foo.o'.  Stop.
 Makefile:1598: recipe for target 'foo.ko' failed
 make[1]: *** [foo.ko] Error 2
 make[1]: Leaving directory '/usr/src/linux-headers-4.6.0-rc6'

Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-05-10 17:41:01 +02:00
Nicolas Pitre a7c65b9729 kbuild: fix adjust_autoksyms.sh for modules that need only one symbol
When only one symbol was listed and therefore the line didn't contain
any space to separate multiple symbols, that symbol got ignored.

Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-05-10 17:25:29 +02:00
Nicolas Pitre f110e0fec8 kbuild: fix ksym_dep_filter when multiple EXPORT_SYMBOL() on the same line
In kernel/cgroup.c there is:

    #define SUBSYS(_x)                                             \
        DEFINE_STATIC_KEY_TRUE(_x ## _cgrp_subsys_enabled_key);    \
        DEFINE_STATIC_KEY_TRUE(_x ## _cgrp_subsys_on_dfl_key);     \
        EXPORT_SYMBOL_GPL(_x ## _cgrp_subsys_enabled_key);         \
        EXPORT_SYMBOL_GPL(_x ## _cgrp_subsys_on_dfl_key);

The expansion of this macro causes multiple EXPORT_SYMBOL_GPL() instances
to appear on the same preprocessor line output, confusing the sed script
expecting only one of them per line.  Unfortunately this can't be fixed
nicely in the sed script as sed's regexp can't do non greedy matching.

Fix this by turning any semicolon into a line break before filtering.

Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-05-10 17:24:15 +02:00
Paul Bolle a466391139 kconfig: add unexpected data itself to warning
If the .config parser runs into unexpected data it emits warnings like:
    .config:6911:warning: unexpected data

Add the unexpected data itself to this warning. That makes it easier to
discover what is actually going wrong:
     .config:6911:warning: unexpected data: CONFOG_CHARGER_TPS65217=m

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-05-10 17:20:19 +02:00
Greg Kroah-Hartman 725d0123df Merge 4.6-rc7 into char-misc-testing
This resolves a merge issue with drivers/hv/ring_buffer.c

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-05-09 09:34:49 +02:00
Philipp Zabel acbef7b766 modpost: fix module autoloading for OF devices with generic compatible property
Since the wildcard at the end of OF module aliases is gone, autoloading
of modules that don't match a device's last (most generic) compatible
value fails.

For example the CODA960 VPU on i.MX6Q has the SoC specific compatible
"fsl,imx6q-vpu" and the generic compatible "cnm,coda960".  Since the
driver currently only works with knowledge about the SoC specific
integration, it doesn't list "cnm,cod960" in the module device table.

This results in the device compatible
"of:NvpuT<NULL>Cfsl,imx6q-vpuCcnm,coda960" not matching the module alias
"of:N*T*Cfsl,imx6q-vpu" anymore, whereas before commit 2f632369ab
("modpost: don't add a trailing wildcard for OF module aliases") it
matched the module alias "of:N*T*Cfsl,imx6q-vpu*".

This patch adds two module aliases for each compatible, one without the
wildcard and one with "C*" appended.

  $ modinfo coda | grep imx6q
  alias:          of:N*T*Cfsl,imx6q-vpuC*
  alias:          of:N*T*Cfsl,imx6q-vpu

Fixes: 2f632369ab ("modpost: don't add a trailing wildcard for OF module aliases")
Link: http://lkml.kernel.org/r/1462203339-15340-1-git-send-email-p.zabel@pengutronix.de
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Cc: Javier Martinez Canillas <javier@osg.samsung.com>
Cc: Brian Norris <computersforpeace@gmail.com>
Cc: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: <stable@vger.kernel.org>	[4.5+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-05 17:38:53 -07:00
Andreas Ziegler 38cbfe4fe8 checkkconfigsymbols.py: Fix typo in help message
Fix a typo in the help message for the -d parameter by removing one 'm'.

Signed-off-by: Andreas Ziegler <andreas.ziegler@fau.de>
Acked-by: Valentin Rothberg <valentinrothberg@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-05-01 14:11:12 -07:00
Nicolas Pitre 366f4856f0 kbuild: adjust ksym_dep_filter for some cmd_* renames
The following renames occurred recently:

  cmd_cc_i_c --> cmd_cpp_i_c
  cmd_as_s_S --> cmd_cpp_s_S

The respective cc_*_c and as_*_S patterns no longer match the above
therefore additional patterns are needed.

Signed-off-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-04-27 10:36:38 +02:00
Benjamin Poirier 5bcba792bb localmodconfig: Fix whitespace repeat count after "tristate"
Also recognize standalone "prompt".

Before this patch we incorrectly identified some symbols as not having a
prompt and potentially needing to be selected by something else.

Note that this patch could theoretically change the resulting .config,
causing it to have fewer symbols turned on. However, given the current set
of Kconfig files, this situation does not occur because the symbols newly
added to %prompts are absent from %selects.

Link: http://lkml.kernel.org/r/1461696998-3953-1-git-send-email-bpoirier@suse.com

Signed-off-by: Benjamin Poirier <bpoirier@suse.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2016-04-26 18:35:16 -04:00
Benjamin Poirier 96bab35d1c localmodconfig: Reset certificate paths
When using `make localmodconfig` and friends, if the input config comes
from a kernel that was built in a different environment (for example, the
canonical case of using localmodconfig to trim a distribution kernel
config) the key files for module signature checking will not be available
and should be regenerated or omitted. Otherwise, the user will be faced
with annoying errors when trying to build with the generated .config:

make[1]: *** No rule to make target 'keyring.crt', needed by 'certs/x509_certificate_list'.  Stop.
Makefile:1576: recipe for target 'certs/' failed

Link: http://lkml.kernel.org/r/1461696721-3001-1-git-send-email-bpoirier@suse.com

Signed-off-by: Benjamin Poirier <bpoirier@suse.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2016-04-26 15:48:20 -04:00
Benjamin Poirier 5169192bc1 localmodconfig: Add missing $ to reference a variable
That is clearly what the original intention was. This does not change the
output .config but it prevents some useless processing.

! eq "m" is changed to the simpler eq "y"; symbols with values other than
m|y are not included in %orig_configs.

Link: http://lkml.kernel.org/r/1460333193-16361-3-git-send-email-bpoirier@suse.com

Signed-off-by: Benjamin Poirier <bpoirier@suse.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2016-04-26 10:06:59 -04:00
Benjamin Poirier a77ed525d0 localmodconfig: Fix parsing of "help" text
Help text may start with "help" or "---help---". This patch fixes
read_kconfig() to recognize the second variant.

This removes useless junk from %depends and %selects. That junk is due to
help text that contains the words "selects" and "depends".

Link: http://lkml.kernel.org/r/1460333193-16361-2-git-send-email-bpoirier@suse.com

Signed-off-by: Benjamin Poirier <bpoirier@suse.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2016-04-26 10:05:01 -04:00
Benjamin Poirier 27b7156886 localmodconfig: Recognize more keywords that end a menu entry
Based on the list in Documentation/kbuild/kconfig-language.txt

This removes junk from %depends because parsing of a menu entry spilled
over to another menu entry.

Link: http://lkml.kernel.org/r/1460333193-16361-1-git-send-email-bpoirier@suse.com

Signed-off-by: Benjamin Poirier <bpoirier@suse.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2016-04-26 10:04:42 -04:00
Benjamin Poirier 296471ad51 localmodconfig: Fix parsing of Kconfig "source" statements
The parameter of Kconfig "source" statements does not need to be quoted.
The current regex causes many kconfig files to be skipped and hence,
dependencies to be missed.

Also fix the whitespace repeat count.

Link: http://lkml.kernel.org/r/1459619722-13695-1-git-send-email-bpoirier@suse.com

Tested-by: Lee, Chun-Yi <jlee@suse.com>
Signed-off-by: Benjamin Poirier <bpoirier@suse.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2016-04-26 09:59:21 -04:00
Michal Marek b42841b7bb kbuild: Get rid of KBUILD_STR
The compiler can accept -DKBUILD_MODNAME="foo", it's just a matter of
quoting. That way, we reduce the gcc command line a bit.

Signed-off-by: Michal Marek <mmarek@suse.com>
2016-04-20 10:50:06 +02:00
Masahiro Yamada e0f41e52dd kbuild: rename cmd_as_s_S to cmd_cpp_s_S
This command just preprocesses .S files into .s files, so cmd_cpp_s_S
seems more suitable.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-04-20 10:49:09 +02:00
Masahiro Yamada 23d4384870 kbuild: rename cmd_cc_i_c to cmd_cpp_i_c
This command just preprocesses .c files into .i files, so cmd_cpp_i_c
seems more suitable.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-04-20 10:48:19 +02:00
Jiri Kosina 27c3bffd23 kbuild/mkspec: support 'update-bootloader'-based systems
When uninstalling kernel RPM, we're unconditionally calling
"new-kernel-pkg --remove". This is useless on systems which are based on
'update-bootloader' script instead.

Support update-bootloader removal method as well in case the script is
present; contrary to new-kernel-pkg, this needs to be done in %postun,
otherwise update-bootloader will refuse to remove entry for kernel for
which the binary still exists.

Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-04-20 10:01:30 +02:00
Wolfram Sang f931362b38 scripts: coccinelle: remove check to move constants to right
The header mentions this check depends on personal taste. I agree.
Running coccicheck on patches before I apply them, this SmPL produced
enough false positives for me that I'd rather see it removed.

Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-04-20 09:53:27 +02:00
Vaishali Thakkar 531f50388f Coccinelle: setup_timer: Add space in front of parentheses
Add space in front of the offending parentheses to silent the
parse error for older Coccinelle versions. This makes the rule
usable with all Coccinelle versions.

Reported-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Vaishali Thakkar <vaishali.thakkar@oracle.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Fixes: c5eda8fd10 ("Coccinelle: Add api/setup_timer.cocci")
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-04-20 09:50:53 +02:00
Maxim Zhukov 4deaaa4deb scripts: genksyms: fix resource leak
This commit fixed resource leak at func main

Signed-off-by: Maxim Zhukov <mussitantesmortem@gmail.com>
Signed-off-by: Michal Marek <mmarek@suse.com>
2016-04-20 09:24:49 +02:00
Greg Kroah-Hartman 5614e77258 Merge 4.6-rc4 into driver-core-next
We want those fixes in here as well.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-04-19 04:28:28 +09:00
Nicolai Stange 5103068eac debugfs, coccinelle: check for obsolete DEFINE_SIMPLE_ATTRIBUTE() usage
In order to protect against file removal races, debugfs files created via
debugfs_create_file() now get wrapped by a struct file_operations at their
opening.

If the original struct file_operations are known to be safe against removal
races by themselves already, the proxy creation may be bypassed by creating
the files through debugfs_create_file_unsafe().

In order to help debugfs users who use the common
  DEFINE_SIMPLE_ATTRIBUTE() + debugfs_create_file()
idiom to transition to removal safe struct file_operations, the helper
macro DEFINE_DEBUGFS_ATTRIBUTE() has been introduced.

Thus, the preferred strategy is to use
  DEFINE_DEBUGFS_ATTRIBUTE() + debugfs_create_file_unsafe()
now.

Introduce a Coccinelle script that searches for
DEFINE_SIMPLE_ATTRIBUTE()-defined struct file_operations handed into
debugfs_create_file(). Suggest to turn these usages into the
  DEFINE_DEBUGFS_ATTRIBUTE() + debugfs_create_file_unsafe()
pattern.

Signed-off-by: Nicolai Stange <nicstange@gmail.com>
Acked-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-04-12 14:14:21 -07:00
Ard Biesheuvel 2d95863999 ARM: 8553/1: kallsyms: remove --page-offset command line option
The --page-offset command line option was only used for ARM, to filter
symbol addresses below CONFIG_PAGE_OFFSET. This is no longer needed, so
remove the functionality altogether.

Acked-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Chris Brandt <chris.brandt@renesas.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2016-04-07 21:57:16 +01:00
Ard Biesheuvel d4ffe41819 ARM: 8552/1: kallsyms: remove special lower address limit for CONFIG_ARM
Now that we no longer emit .stubs symbols into a section VMA loaded
at absolute address 0x1000, we can drop the ARM-specific override that
sets a lower limit based on CONFIG_PAGE_OFFSET, below which symbols are
filtered from the kallsyms output.

Acked-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Chris Brandt <chris.brandt@renesas.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2016-04-07 21:57:15 +01:00
Ard Biesheuvel b9b74be163 ARM: 8555/1: kallsyms: ignore ARM mode switching veneers
On ARM, the linker may emit veneers to deal with relative branch
instructions that appear too far away from their targets. Since the
second kallsyms pass results in an increase of the kernel size, it may
result in additional veneers to be emitted, potentially affecting the
output of kallsyms itself if these symbols are visible to it, and for
that reason, symbols whose names end in '_veneer' are ignored explicitly.

However, when building Thumb2 kernels, such veneers are named differently
if they also incur a mode switch, and since they are not filtered by
kallsyms, they may cause the build to fail. So filter symbols whose names
end in '_from_arm' or '_from_thumb' as well.

Tested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2016-04-07 21:57:15 +01:00
Colin Ian King 952cca6a72 ASN.1: fix open failure check on headername
The check for a failed open on headername is incorrectly checking
on the out FILE pointer rather than the hdr. Fix this.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David Howells <dhowells@redhat.com>
2016-04-06 14:06:48 +01:00
Rob Herring bc553986a2 dtc: turn off dtc unit address warnings by default
The newly added dtc warning to check DT unit-address without reg
property and vice-versa generates lots of warnings. Turn off the check
unless building with W=1 or W=2.

Signed-off-by: Rob Herring <robh@kernel.org>
Cc: Michal Marek <mmarek@suse.com>
Cc: linux-kbuild@vger.kernel.org
2016-03-31 11:44:16 -05:00
Nicolas Pitre 23121ca2b5 kbuild: create/adjust generated/autoksyms.h
Given the list of exported symbols needed by all modules, we can create
a header file containing preprocessor defines for each of those symbols.
Also, when some symbols are added and/or removed from the list, we can
update the time on the corresponding files used as build dependencies for
those symbols. And finally, if any symbol did change state, the
corresponding source files must be rebuilt.

The insertion or removal of an EXPORT_SYMBOL() entry within a module may
create or remove the need for another exported symbol.  This is why this
operation has to be repeated until the list of needed exported symbols
becomes stable. Only then the final kernel and modules link take place.

Signed-off-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
2016-03-29 16:30:57 -04:00
Nicolas Pitre c1a95fda2a kbuild: add fine grained build dependencies for exported symbols
Like with kconfig options, we now have the ability to compile in and
out individual EXPORT_SYMBOL() declarations based on the content of
include/generated/autoksyms.h.  However we don't want the entire
world to be rebuilt whenever that file is touched.

Let's apply the same build dependency trick used for CONFIG_* symbols
where the time stamp of empty files whose paths matching those symbols
is used to trigger fine grained rebuilds. In our case the key is the
symbol name passed to EXPORT_SYMBOL().

However, unlike config options, we cannot just use fixdep to parse
the source code for EXPORT_SYMBOL(ksym) because several variants exist
and parsing them all in a separate tool, and keeping it in synch, is
not trivially maintainable.  Furthermore, there are variants such as

	EXPORT_SYMBOL_GPL(pci_user_read_config_##size);

that are instanciated via a macro for which we can't easily determine
the actual exported symbol name(s) short of actually running the
preprocessor on them.

Storing the symbol name string in a special ELF section doesn't work
for targets that output assembly or preprocessed source.

So the best way is really to leverage the preprocessor by having it
output actual symbol names anchored by a special sequence that can be
easily filtered out. Then the list of symbols is simply fed to fixdep
to be merged with the other dependencies.

That implies the preprocessor is executed twice for each source file.
A previous attempt relied on a warning pragma for each EXPORT_SYMBOL()
instance that was filtered apart from stderr by the build system with
a sed script during the actual compilation pass. Unfortunately the
preprocessor/compiler diagnostic output isn't stable between versions
and this solution, although more efficient, was deemed too fragile.

Because of the lowercasing performed by fixdep, there might be name
collisions triggering spurious rebuilds for similar symbols. But this
shouldn't be a big issue in practice. (This is the case for CONFIG_*
symbols and I didn't want to be different here, whatever the original
reason for doing so.)

To avoid needless build overhead, the exported symbol name gathering is
performed only when CONFIG_TRIM_UNUSED_KSYMS is selected.

Signed-off-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
2016-03-29 16:30:56 -04:00
Nicolas Pitre e4aca45950 kbuild: de-duplicate fixdep usage
The generation and postprocessing of automatic dependency rules is
duplicated in rule_cc_o_c, rule_as_o_S and if_changed_dep. Since
this is not a trivial one-liner action, it is now abstracted under
cmd_and_fixdep to simplify things and make future changes in this area
easier.

In the rule_cc_o_c and rule_as_o_S cases that means the order of some
commands has been altered, namely fixdep and related file manipulations
are executed earlier, but they didn't depend on those commands that now
execute later.

Signed-off-by: Nicolas Pitre <nico@linaro.org>
2016-03-29 16:30:56 -04:00
Nicolas Pitre d8329e35cc fixdep: accept extra dependencies on stdin
... and merge them in the list of parsed dependencies.

Signed-off-by: Nicolas Pitre <nico@linaro.org>
2016-03-29 16:19:40 -04:00
Rob Herring b993734718 scripts/dtc: Update to upstream version 53bf130b1cdd
Sync to upstream dtc commit 53bf130b1cdd ("libfdt: simplify
fdt_node_check_compatible()"). This adds the following commits from
upstream:

53bf130 libfdt: simplify fdt_node_check_compatible()
c9d9121 Warn on node name unit-address presence/absence mismatch
2e53f9d Catch unsigned 32bit overflow when parsing flattened device tree offsets

Signed-off-by: Rob Herring <robh@kernel.org>
2016-03-29 13:29:22 -05:00
Nicolas Pitre 9895c03d48 kbuild: record needed exported symbols for modules
Kernel modules are partially linked object files with some undefined
symbols that are expected to be matched with EXPORT_SYMBOL() entries
from elsewhere.

Each .tmp_versions/*.mod file currently contains two line of text
separated by a newline character. The first line has the actual module
file name while the second line has a list of object files constituting
that module. Those files are parsed by modpost (scripts/mod/sumversion.c),
scripts/Makefile.modpost, scripts/Makefile.modsign, etc.  Only the
modpost utility cares about the second line while the others retrieve
only the first line.

Therefore we can add a third line to record the list of undefined symbols
aka required EXPORT_SYMBOL() entries for each module into that file
without breaking anything. Like for the second line, symbols are separated
by a blank and the list is terminated with a newline character.

To avoid needless build overhead, the undefined symbols extraction is
performed only when CONFIG_TRIM_UNUSED_KSYMS is selected.

Signed-off-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
2016-03-29 13:30:54 -04:00
Linus Torvalds 70c5eb8473 Merge branch 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
Pull kbuild misc updates from Michal Marek:
 "The non-critical part of kbuild for v4.6-rc1:

   - coccinelle cleanup and a new patch
   - make tags rule for kprobe helpers
   - make rpm fix to avoid spurious grub2 entries
   - make rpm support for %postun script (Fedora only at the moment)"

* 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
  kbuild/mkspec: clean boot loader configuration on rpm removal
  kbuild/mkspec: fix grub2 installkernel issue
  Coccinelle: Add api/setup_timer.cocci
  coccinelle: bugon: reduce rule applicability
  Coccinelle: pm_runtime: reduce rule applicability
  Coccinelle: array_size: reduce rule applicability
  Coccinelle: reduce rule applicability
  scripts/tags.sh: add regex to map kprobe helpers
  scripts/coccinelle: modernize &
2016-03-24 19:42:50 -07:00
Linus Torvalds 3a1ef0e03e Merge branch 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
Pull kconfig updates from Michal Marek:
 "Just two kconfig commits this time:

   - kconfig Makefile fix for make 3.80

   - Fix calculating symbols so that KCONFIG_ALLCONFIG=... does not
     disable CONFIG_MODULES silently"

* 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
  unbreak allmodconfig KCONFIG_ALLCONFIG=...
  scripts/kconfig: allow building with make 3.80 again
2016-03-24 19:39:28 -07:00
Linus Torvalds 2162b80fca Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
Pull kbuild updates from Michal Marek:

 - make dtbs_install fix

 - Error handling fix fixdep and link-vmlinux.sh

 - __UNIQUE_ID fix for clang

 - Fix for if_changed_* to suppress the "is up to date." message

 - The kernel is built with -Werror=incompatible-pointer-types

* 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
  kbuild: Add option to turn incompatible pointer check into error
  kbuild: suppress annoying "... is up to date." message
  kbuild: fixdep: Check fstat(2) return value
  scripts/link-vmlinux.sh: force error on kallsyms failure
  Kbuild: provide a __UNIQUE_ID for clang
  dtbsinstall: don't move target directory out of the way
2016-03-24 19:26:47 -07:00
Helge Deller 0de798584b parisc: Use generic extable search and sort routines
Switch to the generic extable search and sort routines which were introduced
with commit a272858 from Ard Biesheuvel. This saves quite some memory in the
vmlinux binary with the 64bit kernel.

Signed-off-by: Helge Deller <deller@gmx.de>
2016-03-23 16:00:46 +01:00
Andrey Ryabinin dde5cf39d4 ubsan: fix tree-wide -Wmaybe-uninitialized false positives
-fsanitize=* options makes GCC less smart than usual and increase number
of 'maybe-uninitialized' false-positives. So this patch does two things:

 * Add -Wno-maybe-uninitialized to CFLAGS_UBSAN which will disable all
   such warnings for instrumented files.

 * Remove CONFIG_UBSAN_SANITIZE_ALL from all[yes|mod]config builds. So
   the all[yes|mod]config build goes without -fsanitize=* and still with
   -Wmaybe-uninitialized.

Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-03-22 15:36:02 -07:00
Jan Kiszka ad4db3b24a scripts/gdb: account for changes in module data structure
Commit 7523e4dc50 ("module: use a structure to encapsulate layout.")
factored out the module_layout structure.  Adjust the symbol loader and
the lsmod command to this.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Reviewed-by: Kieran Bingham <kieran.bingham@linaro.org>
Tested-by: Kieran Bingham <kieran.bingham@linaro.org> (qemu-{ARM,x86})
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Jason Wessel <jason.wessel@windriver.com>
Cc: <stable@vger.kernel.org>	[4.4+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-03-22 15:36:02 -07:00
Kieran Bingham 72bf92ec29 scripts/gdb: add cmdline reader command
lx-cmdline Report the Linux Commandline used in the current kernel

[jan.kiszka@siemens.com: remove blank line from help output and fix pep8 warning]
Signed-off-by: Kieran Bingham <kieran.bingham@linaro.org>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-03-22 15:36:02 -07:00
Kieran Bingham 2d061d9994 scripts/gdb: add version command
lx-version Report the Linux Version of the current kernel.

Add a command to identify the version specified by the banner in the
debugged kernel.

This lets the user identify the kernel of the running kernel, and will
let later scripts compare the banner of the attached kernel against the
banner in the vmlinux symbols files to verify that the files are
correct.

[jan.kiszka@siemens.com: remove blank line from help output and fix pep8 warning]
Signed-off-by: Kieran Bingham <kieran.bingham@linaro.org>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-03-22 15:36:02 -07:00
Dmitry Vyukov 5c9a8750a6 kernel: add kcov code coverage
kcov provides code coverage collection for coverage-guided fuzzing
(randomized testing).  Coverage-guided fuzzing is a testing technique
that uses coverage feedback to determine new interesting inputs to a
system.  A notable user-space example is AFL
(http://lcamtuf.coredump.cx/afl/).  However, this technique is not
widely used for kernel testing due to missing compiler and kernel
support.

kcov does not aim to collect as much coverage as possible.  It aims to
collect more or less stable coverage that is function of syscall inputs.
To achieve this goal it does not collect coverage in soft/hard
interrupts and instrumentation of some inherently non-deterministic or
non-interesting parts of kernel is disbled (e.g.  scheduler, locking).

Currently there is a single coverage collection mode (tracing), but the
API anticipates additional collection modes.  Initially I also
implemented a second mode which exposes coverage in a fixed-size hash
table of counters (what Quentin used in his original patch).  I've
dropped the second mode for simplicity.

This patch adds the necessary support on kernel side.  The complimentary
compiler support was added in gcc revision 231296.

We've used this support to build syzkaller system call fuzzer, which has
found 90 kernel bugs in just 2 months:

  https://github.com/google/syzkaller/wiki/Found-Bugs

We've also found 30+ bugs in our internal systems with syzkaller.
Another (yet unexplored) direction where kcov coverage would greatly
help is more traditional "blob mutation".  For example, mounting a
random blob as a filesystem, or receiving a random blob over wire.

Why not gcov.  Typical fuzzing loop looks as follows: (1) reset
coverage, (2) execute a bit of code, (3) collect coverage, repeat.  A
typical coverage can be just a dozen of basic blocks (e.g.  an invalid
input).  In such context gcov becomes prohibitively expensive as
reset/collect coverage steps depend on total number of basic
blocks/edges in program (in case of kernel it is about 2M).  Cost of
kcov depends only on number of executed basic blocks/edges.  On top of
that, kernel requires per-thread coverage because there are always
background threads and unrelated processes that also produce coverage.
With inlined gcov instrumentation per-thread coverage is not possible.

kcov exposes kernel PCs and control flow to user-space which is
insecure.  But debugfs should not be mapped as user accessible.

Based on a patch by Quentin Casasnovas.

[akpm@linux-foundation.org: make task_struct.kcov_mode have type `enum kcov_mode']
[akpm@linux-foundation.org: unbreak allmodconfig]
[akpm@linux-foundation.org: follow x86 Makefile layout standards]
Signed-off-by: Dmitry Vyukov <dvyukov@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Cc: syzkaller <syzkaller@googlegroups.com>
Cc: Vegard Nossum <vegard.nossum@oracle.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Tavis Ormandy <taviso@google.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Cc: Kostya Serebryany <kcc@google.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Kees Cook <keescook@google.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: David Drysdale <drysdale@google.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Kirill A. Shutemov <kirill@shutemov.name>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-03-22 15:36:02 -07:00
Linus Torvalds 26660a4046 Merge branch 'core-objtool-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull 'objtool' stack frame validation from Ingo Molnar:
 "This tree adds a new kernel build-time object file validation feature
  (ONFIG_STACK_VALIDATION=y): kernel stack frame correctness validation.
  It was written by and is maintained by Josh Poimboeuf.

  The motivation: there's a category of hard to find kernel bugs, most
  of them in assembly code (but also occasionally in C code), that
  degrades the quality of kernel stack dumps/backtraces.  These bugs are
  hard to detect at the source code level.  Such bugs result in
  incorrect/incomplete backtraces most of time - but can also in some
  rare cases result in crashes or other undefined behavior.

  The build time correctness checking is done via the new 'objtool'
  user-space utility that was written for this purpose and which is
  hosted in the kernel repository in tools/objtool/.  The tool's (very
  simple) UI and source code design is shaped after Git and perf and
  shares quite a bit of infrastructure with tools/perf (which tooling
  infrastructure sharing effort got merged via perf and is already
  upstream).  Objtool follows the well-known kernel coding style.

  Objtool does not try to check .c or .S files, it instead analyzes the
  resulting .o generated machine code from first principles: it decodes
  the instruction stream and interprets it.  (Right now objtool supports
  the x86-64 architecture.)

  From tools/objtool/Documentation/stack-validation.txt:

   "The kernel CONFIG_STACK_VALIDATION option enables a host tool named
    objtool which runs at compile time.  It has a "check" subcommand
    which analyzes every .o file and ensures the validity of its stack
    metadata.  It enforces a set of rules on asm code and C inline
    assembly code so that stack traces can be reliable.

    Currently it only checks frame pointer usage, but there are plans to
    add CFI validation for C files and CFI generation for asm files.

    For each function, it recursively follows all possible code paths
    and validates the correct frame pointer state at each instruction.

    It also follows code paths involving special sections, like
    .altinstructions, __jump_table, and __ex_table, which can add
    alternative execution paths to a given instruction (or set of
    instructions).  Similarly, it knows how to follow switch statements,
    for which gcc sometimes uses jump tables."

  When this new kernel option is enabled (it's disabled by default), the
  tool, if it finds any suspicious assembly code pattern, outputs
  warnings in compiler warning format:

    warning: objtool: rtlwifi_rate_mapping()+0x2e7: frame pointer state mismatch
    warning: objtool: cik_tiling_mode_table_init()+0x6ce: call without frame pointer save/setup
    warning: objtool:__schedule()+0x3c0: duplicate frame pointer save
    warning: objtool:__schedule()+0x3fd: sibling call from callable instruction with changed frame pointer

  ... so that scripts that pick up compiler warnings will notice them.
  All known warnings triggered by the tool are fixed by the tree, most
  of the commits in fact prepare the kernel to be warning-free.  Most of
  them are bugfixes or cleanups that stand on their own, but there are
  also some annotations of 'special' stack frames for justified cases
  such entries to JIT-ed code (BPF) or really special boot time code.

  There are two other long-term motivations behind this tool as well:

   - To improve the quality and reliability of kernel stack frames, so
     that they can be used for optimized live patching.

   - To create independent infrastructure to check the correctness of
     CFI stack frames at build time.  CFI debuginfo is notoriously
     unreliable and we cannot use it in the kernel as-is without extra
     checking done both on the kernel side and on the build side.

  The quality of kernel stack frames matters to debuggability as well,
  so IMO we can merge this without having to consider the live patching
  or CFI debuginfo angle"

* 'core-objtool-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (52 commits)
  objtool: Only print one warning per function
  objtool: Add several performance improvements
  tools: Copy hashtable.h into tools directory
  objtool: Fix false positive warnings for functions with multiple switch statements
  objtool: Rename some variables and functions
  objtool: Remove superflous INIT_LIST_HEAD
  objtool: Add helper macros for traversing instructions
  objtool: Fix false positive warnings related to sibling calls
  objtool: Compile with debugging symbols
  objtool: Detect infinite recursion
  objtool: Prevent infinite recursion in noreturn detection
  objtool: Detect and warn if libelf is missing and don't break the build
  tools: Support relative directory path for 'O='
  objtool: Support CROSS_COMPILE
  x86/asm/decoder: Use explicitly signed chars
  objtool: Enable stack metadata validation on 64-bit x86
  objtool: Add CONFIG_STACK_VALIDATION option
  objtool: Add tool to perform compile-time stack metadata validation
  x86/kprobes: Mark kretprobe_trampoline() stack frame as non-standard
  sched: Always inline context_switch()
  ...
2016-03-20 18:23:21 -07:00
Linus Torvalds 31e182363b DeviceTree updates for 4.6:
- New tool dtx_diff to diff DT files.
 
 - Sync kernel's dtc/libfdt to current dtc repo master.
 
 - Fix for reserved memory regions located in highmem.
 
 - Document standard unit suffixes for DT properties.
 
 - Various DT binding doc updates.
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Merge tag 'devicetree-for-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux

Pull DeviceTree updates from Rob Herring:

 - new tool 'dtx_diff' to diff DT files

 - sync kernel's dtc/libfdt to current dtc repo master

 - fix for reserved memory regions located in highmem

 - document standard unit suffixes for DT properties

 - various DT binding doc updates

* tag 'devicetree-for-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
  of: Add vendor prefix for eGalax_eMPIA Technology Inc
  Input: ads7846: Add description how to use internal reference (ADS7846)
  ARM: realview: add EB syscon variants to bindings
  devicetree: bindings: ARM: Use "uV" for micro-volt
  serial: fsl-imx-uart: Fix typo in fsl,dte-mode description
  of: add 'const' for of_property_*_string*() parameter '*np'
  of/unittest: fix infinite loop in of_unittest_destroy_tracked_overlays()
  of: alloc anywhere from memblock if range not specified
  kbuild: Allow using host dtc instead of kernel's copy
  of: resolver: Add missing of_node_get and of_node_put
  of: Add United Radiant Technology Corporation vendor prefix
  dt/bindings: add documentation on standard property unit suffixes
  scripts/dtc: Update to upstream commit b06e55c88b9b
  ARM: boot: Add an implementation of strnlen for libfdt
  scripts/dtc: dtx_diff - add info to error message
  dtc: create tool to diff device trees
2016-03-19 15:15:07 -07:00
Linus Torvalds 588ab3f9af arm64 updates for 4.6:
- Initial page table creation reworked to avoid breaking large block
   mappings (huge pages) into smaller ones. The ARM architecture requires
   break-before-make in such cases to avoid TLB conflicts but that's not
   always possible on live page tables
 
 - Kernel virtual memory layout: the kernel image is no longer linked to
   the bottom of the linear mapping (PAGE_OFFSET) but at the bottom of
   the vmalloc space, allowing the kernel to be loaded (nearly) anywhere
   in physical RAM
 
 - Kernel ASLR: position independent kernel Image and modules being
   randomly mapped in the vmalloc space with the randomness is provided
   by UEFI (efi_get_random_bytes() patches merged via the arm64 tree,
   acked by Matt Fleming)
 
 - Implement relative exception tables for arm64, required by KASLR
   (initial code for ARCH_HAS_RELATIVE_EXTABLE added to lib/extable.c but
   actual x86 conversion to deferred to 4.7 because of the merge
   dependencies)
 
 - Support for the User Access Override feature of ARMv8.2: this allows
   uaccess functions (get_user etc.) to be implemented using LDTR/STTR
   instructions. Such instructions, when run by the kernel, perform
   unprivileged accesses adding an extra level of protection. The
   set_fs() macro is used to "upgrade" such instruction to privileged
   accesses via the UAO bit
 
 - Half-precision floating point support (part of ARMv8.2)
 
 - Optimisations for CPUs with or without a hardware prefetcher (using
   run-time code patching)
 
 - copy_page performance improvement to deal with 128 bytes at a time
 
 - Sanity checks on the CPU capabilities (via CPUID) to prevent
   incompatible secondary CPUs from being brought up (e.g. weird
   big.LITTLE configurations)
 
 - valid_user_regs() reworked for better sanity check of the sigcontext
   information (restored pstate information)
 
 - ACPI parking protocol implementation
 
 - CONFIG_DEBUG_RODATA enabled by default
 
 - VDSO code marked as read-only
 
 - DEBUG_PAGEALLOC support
 
 - ARCH_HAS_UBSAN_SANITIZE_ALL enabled
 
 - Erratum workaround Cavium ThunderX SoC
 
 - set_pte_at() fix for PROT_NONE mappings
 
 - Code clean-ups
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Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 updates from Catalin Marinas:
 "Here are the main arm64 updates for 4.6.  There are some relatively
  intrusive changes to support KASLR, the reworking of the kernel
  virtual memory layout and initial page table creation.

  Summary:

   - Initial page table creation reworked to avoid breaking large block
     mappings (huge pages) into smaller ones.  The ARM architecture
     requires break-before-make in such cases to avoid TLB conflicts but
     that's not always possible on live page tables

   - Kernel virtual memory layout: the kernel image is no longer linked
     to the bottom of the linear mapping (PAGE_OFFSET) but at the bottom
     of the vmalloc space, allowing the kernel to be loaded (nearly)
     anywhere in physical RAM

   - Kernel ASLR: position independent kernel Image and modules being
     randomly mapped in the vmalloc space with the randomness is
     provided by UEFI (efi_get_random_bytes() patches merged via the
     arm64 tree, acked by Matt Fleming)

   - Implement relative exception tables for arm64, required by KASLR
     (initial code for ARCH_HAS_RELATIVE_EXTABLE added to lib/extable.c
     but actual x86 conversion to deferred to 4.7 because of the merge
     dependencies)

   - Support for the User Access Override feature of ARMv8.2: this
     allows uaccess functions (get_user etc.) to be implemented using
     LDTR/STTR instructions.  Such instructions, when run by the kernel,
     perform unprivileged accesses adding an extra level of protection.
     The set_fs() macro is used to "upgrade" such instruction to
     privileged accesses via the UAO bit

   - Half-precision floating point support (part of ARMv8.2)

   - Optimisations for CPUs with or without a hardware prefetcher (using
     run-time code patching)

   - copy_page performance improvement to deal with 128 bytes at a time

   - Sanity checks on the CPU capabilities (via CPUID) to prevent
     incompatible secondary CPUs from being brought up (e.g.  weird
     big.LITTLE configurations)

   - valid_user_regs() reworked for better sanity check of the
     sigcontext information (restored pstate information)

   - ACPI parking protocol implementation

   - CONFIG_DEBUG_RODATA enabled by default

   - VDSO code marked as read-only

   - DEBUG_PAGEALLOC support

   - ARCH_HAS_UBSAN_SANITIZE_ALL enabled

   - Erratum workaround Cavium ThunderX SoC

   - set_pte_at() fix for PROT_NONE mappings

   - Code clean-ups"

* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (99 commits)
  arm64: kasan: Fix zero shadow mapping overriding kernel image shadow
  arm64: kasan: Use actual memory node when populating the kernel image shadow
  arm64: Update PTE_RDONLY in set_pte_at() for PROT_NONE permission
  arm64: Fix misspellings in comments.
  arm64: efi: add missing frame pointer assignment
  arm64: make mrs_s prefixing implicit in read_cpuid
  arm64: enable CONFIG_DEBUG_RODATA by default
  arm64: Rework valid_user_regs
  arm64: mm: check at build time that PAGE_OFFSET divides the VA space evenly
  arm64: KVM: Move kvm_call_hyp back to its original localtion
  arm64: mm: treat memstart_addr as a signed quantity
  arm64: mm: list kernel sections in order
  arm64: lse: deal with clobbered IP registers after branch via PLT
  arm64: mm: dump: Use VA_START directly instead of private LOWEST_ADDR
  arm64: kconfig: add submenu for 8.2 architectural features
  arm64: kernel: acpi: fix ioremap in ACPI parking protocol cpu_postboot
  arm64: Add support for Half precision floating point
  arm64: Remove fixmap include fragility
  arm64: Add workaround for Cavium erratum 27456
  arm64: mm: Mark .rodata as RO
  ...
2016-03-17 20:03:47 -07:00
Linus Torvalds 8eee93e257 Char/Misc patches for 4.6-rc1
Here is the big char/misc driver update for 4.6-rc1.
 
 The majority of the patches here is hwtracing and some new mic drivers,
 but there's a lot of other driver updates as well.  Full details in the
 shortlog.
 
 All have been in linux-next for a while with no reported issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-4.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc updates from Greg KH:
 "Here is the big char/misc driver update for 4.6-rc1.

  The majority of the patches here is hwtracing and some new mic
  drivers, but there's a lot of other driver updates as well.  Full
  details in the shortlog.

  All have been in linux-next for a while with no reported issues"

* tag 'char-misc-4.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (238 commits)
  goldfish: Fix build error of missing ioremap on UM
  nvmem: mediatek: Fix later provider initialization
  nvmem: imx-ocotp: Fix return value of imx_ocotp_read
  nvmem: Fix dependencies for !HAS_IOMEM archs
  char: genrtc: replace blacklist with whitelist
  drivers/hwtracing: make coresight-etm-perf.c explicitly non-modular
  drivers: char: mem: fix IS_ERROR_VALUE usage
  char: xillybus: Fix internal data structure initialization
  pch_phub: return -ENODATA if ROM can't be mapped
  Drivers: hv: vmbus: Support kexec on ws2012 r2 and above
  Drivers: hv: vmbus: Support handling messages on multiple CPUs
  Drivers: hv: utils: Remove util transport handler from list if registration fails
  Drivers: hv: util: Pass the channel information during the init call
  Drivers: hv: vmbus: avoid unneeded compiler optimizations in vmbus_wait_for_unload()
  Drivers: hv: vmbus: remove code duplication in message handling
  Drivers: hv: vmbus: avoid wait_for_completion() on crash
  Drivers: hv: vmbus: don't loose HVMSG_TIMER_EXPIRED messages
  misc: at24: replace memory_accessor with nvmem_device_read
  eeprom: 93xx46: extend driver to plug into the NVMEM framework
  eeprom: at25: extend driver to plug into the NVMEM framework
  ...
2016-03-17 13:47:50 -07:00
Linus Torvalds bb7aeae3d6 Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
Pull security layer updates from James Morris:
 "There are a bunch of fixes to the TPM, IMA, and Keys code, with minor
  fixes scattered across the subsystem.

  IMA now requires signed policy, and that policy is also now measured
  and appraised"

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (67 commits)
  X.509: Make algo identifiers text instead of enum
  akcipher: Move the RSA DER encoding check to the crypto layer
  crypto: Add hash param to pkcs1pad
  sign-file: fix build with CMS support disabled
  MAINTAINERS: update tpmdd urls
  MODSIGN: linux/string.h should be #included to get memcpy()
  certs: Fix misaligned data in extra certificate list
  X.509: Handle midnight alternative notation in GeneralizedTime
  X.509: Support leap seconds
  Handle ISO 8601 leap seconds and encodings of midnight in mktime64()
  X.509: Fix leap year handling again
  PKCS#7: fix unitialized boolean 'want'
  firmware: change kernel read fail to dev_dbg()
  KEYS: Use the symbol value for list size, updated by scripts/insert-sys-cert
  KEYS: Reserve an extra certificate symbol for inserting without recompiling
  modsign: hide openssl output in silent builds
  tpm_tis: fix build warning with tpm_tis_resume
  ima: require signed IMA policy
  ima: measure and appraise the IMA policy itself
  ima: load policy using path
  ...
2016-03-17 11:33:45 -07:00
Linus Torvalds 271ecc5253 Merge branch 'akpm' (patches from Andrew)
Merge first patch-bomb from Andrew Morton:

 - some misc things

 - ofs2 updates

 - about half of MM

 - checkpatch updates

 - autofs4 update

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (120 commits)
  autofs4: fix string.h include in auto_dev-ioctl.h
  autofs4: use pr_xxx() macros directly for logging
  autofs4: change log print macros to not insert newline
  autofs4: make autofs log prints consistent
  autofs4: fix some white space errors
  autofs4: fix invalid ioctl return in autofs4_root_ioctl_unlocked()
  autofs4: fix coding style line length in autofs4_wait()
  autofs4: fix coding style problem in autofs4_get_set_timeout()
  autofs4: coding style fixes
  autofs: show pipe inode in mount options
  kallsyms: add support for relative offsets in kallsyms address table
  kallsyms: don't overload absolute symbol type for percpu symbols
  x86: kallsyms: disable absolute percpu symbols on !SMP
  checkpatch: fix another left brace warning
  checkpatch: improve UNSPECIFIED_INT test for bare signed/unsigned uses
  checkpatch: warn on bare unsigned or signed declarations without int
  checkpatch: exclude asm volatile from complex macro check
  mm: memcontrol: drop unnecessary lru locking from mem_cgroup_migrate()
  mm: migrate: consolidate mem_cgroup_migrate() calls
  mm/compaction: speed up pageblock_pfn_to_page() when zone is contiguous
  ...
2016-03-16 11:51:08 -07:00
Ard Biesheuvel 2213e9a66b kallsyms: add support for relative offsets in kallsyms address table
Similar to how relative extables are implemented, it is possible to emit
the kallsyms table in such a way that it contains offsets relative to
some anchor point in the kernel image rather than absolute addresses.

On 64-bit architectures, it cuts the size of the kallsyms address table
in half, since offsets between kernel symbols can typically be expressed
in 32 bits.  This saves several hundreds of kilobytes of permanent
.rodata on average.  In addition, the kallsyms address table is no
longer subject to dynamic relocation when CONFIG_RELOCATABLE is in
effect, so the relocation work done after decompression now doesn't have
to do relocation updates for all these values.  This saves up to 24
bytes (i.e., the size of a ELF64 RELA relocation table entry) per value,
which easily adds up to a couple of megabytes of uncompressed __init
data on ppc64 or arm64.  Even if these relocation entries typically
compress well, the combined size reduction of 2.8 MB uncompressed for a
ppc64_defconfig build (of which 2.4 MB is __init data) results in a ~500
KB space saving in the compressed image.

Since it is useful for some architectures (like x86) to retain the
ability to emit absolute values as well, this patch also adds support
for capturing both absolute and relative values when
KALLSYMS_ABSOLUTE_PERCPU is in effect, by emitting absolute per-cpu
addresses as positive 32-bit values, and addresses relative to the
lowest encountered relative symbol as negative values, which are
subtracted from the runtime address of this base symbol to produce the
actual address.

Support for the above is enabled by default for all architectures except
IA-64 and Tile-GX, whose symbols are too far apart to capture in this
manner.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Kees Cook <keescook@chromium.org>
Tested-by: Kees Cook <keescook@chromium.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Michal Marek <mmarek@suse.cz>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-03-15 16:55:16 -07:00