Since commit 00c864f890 ("kconfig: allow all config targets to write
auto.conf if missing"), Kconfig creates include/config/auto.conf in the
defconfig stage when it is missing.
Joonas Kylmälä reported incorrect auto.conf generation under some
circumstances.
To reproduce it, apply the following diff:
| --- a/arch/arm/configs/imx_v6_v7_defconfig
| +++ b/arch/arm/configs/imx_v6_v7_defconfig
| @@ -345,14 +345,7 @@ CONFIG_USB_CONFIGFS_F_MIDI=y
| CONFIG_USB_CONFIGFS_F_HID=y
| CONFIG_USB_CONFIGFS_F_UVC=y
| CONFIG_USB_CONFIGFS_F_PRINTER=y
| -CONFIG_USB_ZERO=m
| -CONFIG_USB_AUDIO=m
| -CONFIG_USB_ETH=m
| -CONFIG_USB_G_NCM=m
| -CONFIG_USB_GADGETFS=m
| -CONFIG_USB_FUNCTIONFS=m
| -CONFIG_USB_MASS_STORAGE=m
| -CONFIG_USB_G_SERIAL=m
| +CONFIG_USB_FUNCTIONFS=y
| CONFIG_MMC=y
| CONFIG_MMC_SDHCI=y
| CONFIG_MMC_SDHCI_PLTFM=y
And then, run:
$ make ARCH=arm mrproper imx_v6_v7_defconfig
You will see CONFIG_USB_FUNCTIONFS=y is correctly contained in the
.config, but not in the auto.conf.
Please note drivers/usb/gadget/legacy/Kconfig is included from a choice
block in drivers/usb/gadget/Kconfig. So USB_FUNCTIONFS is a choice value.
This is probably a similar situation described in commit beaaddb625
("kconfig: tests: test defconfig when two choices interact").
When sym_calc_choice() is called, the choice symbol forgets the
SYMBOL_DEF_USER unless all of its choice values are explicitly set by
the user.
The choice symbol is given just one chance to recall it because
set_all_choice_values() is called if SYMBOL_NEED_SET_CHOICE_VALUES
is set.
When sym_calc_choice() is called again, the choice symbol forgets it
forever, since SYMBOL_NEED_SET_CHOICE_VALUES is a one-time aid.
Hence, we cannot call sym_clear_all_valid() again and again.
It is crazy to repeat set and unset of internal flags. However, we
cannot simply get rid of "sym->flags &= flags | ~SYMBOL_DEF_USER;"
Doing so would re-introduce the problem solved by commit 5d09598d48
("kconfig: fix new choices being skipped upon config update").
To work around the issue, conf_write_autoconf() stopped calling
sym_clear_all_valid().
conf_write() must be changed accordingly. Currently, it clears
SYMBOL_WRITE after the symbol is written into the .config file. This
is needed to prevent it from writing the same symbol multiple times in
case the symbol is declared in two or more locations. I added the new
flag SYMBOL_WRITTEN, to track the symbols that have been written.
Anyway, this is a cheesy workaround in order to suppress the issue
as far as defconfig is concerned.
Handling of choices is totally broken. sym_clear_all_valid() is called
every time a user touches a symbol from the GUI interface. To reproduce
it, just add a new symbol drivers/usb/gadget/legacy/Kconfig, then touch
around unrelated symbols from menuconfig. USB_FUNCTIONFS will disappear
from the .config file.
I added the Fixes tag since it is more fatal than before. But, this
has been broken since long long time before, and still it is.
We should take a closer look to fix this correctly somehow.
Fixes: 00c864f890 ("kconfig: allow all config targets to write auto.conf if missing")
Cc: linux-stable <stable@vger.kernel.org> # 4.19+
Reported-by: Joonas Kylmälä <joonas.kylmala@iki.fi>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Tested-by: Joonas Kylmälä <joonas.kylmala@iki.fi>
'make olddefconfig' is non-interactive, so we can drop 'yes'.
The behavior is equivalent.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
- always require argument for --defconfig and remove the hard-coded
arch/$(ARCH)/defconfig path
- make arch/$(SRCARCH)/configs/defconfig the new default of defconfig
- some code cleanups
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Merge tag 'kconfig-v5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kconfig updates from Masahiro Yamada:
- always require argument for --defconfig and remove the hard-coded
arch/$(ARCH)/defconfig path
- make arch/$(SRCARCH)/configs/defconfig the new default of defconfig
- some code cleanups
* tag 'kconfig-v5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
kconfig: remove meaningless if-conditional in conf_read()
kconfig: Fix spelling of sym_is_changable
unicore32: rename unicore32_defconfig to defconfig
kconfig: make arch/*/configs/defconfig the default of KBUILD_DEFCONFIG
kconfig: add static qualifier to expand_string()
kconfig: require the argument of --defconfig
kconfig: remove always false ifeq ($(KBUILD_DEFCONFIG,) conditional
sym_is_choice(sym) has already been checked by previous if-block:
if (sym_is_choice(sym) || (sym->flags & SYMBOL_NO_WRITE))
continue;
Hence, the following code is redundant, and the comment is misleading:
if (!sym_is_choice(sym))
continue;
/* fall through */
It always takes 'continue', never falls though.
Clean up the dead code.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
There is a spelling mistake in "changable", it is corrected to
"changeable" and all call sites are updated accordingly.
Signed-off-by: Marco Ammon <marco.ammon@fau.de>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
The kbuild documentation clearly shows that the documents
there are written at different times: some use markdown,
some use their own peculiar logic to split sections.
Convert everything to ReST without affecting too much
the author's style and avoiding adding uneeded markups.
The conversion is actually:
- add blank lines and identation in order to identify paragraphs;
- fix tables markups;
- add some lists markups;
- mark literal blocks;
- adjust title markups.
At its new index.rst, let's add a :orphan: while this is not linked to
the main index.rst file, in order to avoid build warnings.
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Until recently, if KBUILD_DEFCONFIG was not set by the arch Makefile,
the default path arch/*/defconfig was used.
The last users of the default are gone by the following commits:
- Commit f3e20ad67b ("s390: move arch/s390/defconfig to
arch/s390/configs/defconfig")
- Commit 986a13769c ("alpha: move arch/alpha/defconfig to
arch/alpha/configs/defconfig")
Let's set arch/*/configs/defconfig as a new default. This saves
KBUILD_DEFCONFIG for some architectures.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Currently, the argument for --defconfig is optional. If the argument
is not passed, the hard-coded default arch/$(ARCH)/defconfig is used.
It no longer happens in Linux since the last users of the default are
gone by the following commits:
- Commit f3e20ad67b ("s390: move arch/s390/defconfig to
arch/s390/configs/defconfig")
- Commit 986a13769c ("alpha: move arch/alpha/defconfig to
arch/alpha/configs/defconfig")
I want to kill the Linux-specific directory path embedded in the
Kconfig binary.
The --savedefconfig (reverse operation of --defconfig) requires an
argument, so it should not hurt to do likewise for --defconfig.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
With the following two commits applied, all the arch Makefiles
define KBUILD_DEFCONFIG.
- Commit f3e20ad67b ("s390: move arch/s390/defconfig to
arch/s390/configs/defconfig")
- Commit 986a13769c ("alpha: move arch/alpha/defconfig to
arch/alpha/configs/defconfig")
The first conditional in the defconfig rule is always false.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Adding SPDX license identifier is pretty safe; however, here is one
exception.
Since commit ec8f24b7fa ("treewide: Add SPDX license identifier -
Makefile/Kconfig"), "make testconfig" would not pass.
When Kconfig detects a circular file inclusion, it displays error
messages with a file name and a line number prefixed to each line.
The unit test checks if Kconfig emits the error messages correctly
(this also checks the line number correctness).
Now that the test input has the SPDX license identifier at the very top,
the line numbers in the expected stderr should be incremented by 1.
Fixes: ec8f24b7fa ("treewide: Add SPDX license identifier - Makefile/Kconfig")
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Add SPDX license identifiers to all Make/Kconfig files which:
- Have no license information of any form
These files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:
GPL-2.0-only
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
'ifeq ... else ifneq ... endif' notation is supported by GNU Make 3.81
or later, which is the requirement for building the kernel since
commit 37d69ee308 ("docs: bump minimal GNU Make version to 3.81").
Use it to improve the readability.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Currently menu blocks start with a pretty header but end with nothing in
the generated config. So next config options stick together with the
options from the menu block.
Let's terminate menu blocks in the generated config with a comment and
a newline if needed. Example:
...
CONFIG_BPF_STREAM_PARSER=y
CONFIG_NET_FLOW_LIMIT=y
#
# Network testing
#
CONFIG_NET_PKTGEN=y
CONFIG_NET_DROP_MONITOR=y
# end of Network testing
# end of Networking options
CONFIG_HAMRADIO=y
...
Signed-off-by: Alexander Popov <alex.popov@linux.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Currently, the Kbuild core manipulates header search paths in a crazy
way [1].
To fix this mess, I want all Makefiles to add explicit $(srctree)/ to
the search paths in the srctree. Some Makefiles are already written in
that way, but not all. The goal of this work is to make the notation
consistent, and finally get rid of the gross hacks.
Having whitespaces after -I does not matter since commit 48f6e3cf5b
("kbuild: do not drop -I without parameter").
[1]: https://patchwork.kernel.org/patch/9632347/
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Valid pathnames will never exceed PATH_MAX, but these file names
are unsanitized and can cause buffer overflow if set incorrectly.
Use snprintf to avoid this. This was flagged during a Coverity scan
of the coreboot project, which also uses kconfig for its build system.
Signed-off-by: Jacob Garber <jgarber1@ualberta.ca>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
conf_write_dep() has just one caller:
conf_write_dep("include/config/auto.conf.cmd");
"name" always points to a valid string.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
With menuconfig / nconfig, users can input any file path from the
"Save" menu, but it fails if the parent directory does not exist.
Why not create the parent directory automatically. I think this is
a user-friendly behavior.
I changed the error messages in menuconfig / nconfig.
"Nonexistent directory" is no longer the most likely reason of the
failure. Perhaps, the user specified the existing directory, or
attempted to write to the location without write permission.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Kconfig updates the .config when it exits even if its content is
exactly the same as before. Since its timestamp becomes newer than
that of other build artifacts, additional processing is invoked,
which is annoying.
- syncconfig is invoked to update include/config/auto.conf, etc.
- kernel/configs.o is recompiled if CONFIG_IKCONFIG is enabled,
then vmlinux is relinked as well.
If the .config is not changed at all, we do not have to even
touch it. Just bail out showing "No change to .config".
$ make allmodconfig
scripts/kconfig/conf --allmodconfig Kconfig
#
# configuration written to .config
#
$ make allmodconfig
scripts/kconfig/conf --allmodconfig Kconfig
#
# No change to .config
#
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Currently, conf_write() can be called with a directory name instead
of a file name. As far as I see, this can happen for menuconfig,
nconfig, gconfig.
If it is given with a directory path, conf_write() kindly appends
getenv("KCONFIG_CONFIG"), but this ends up with hacky dir/basename
handling, and screwed up in corner-cases like "what if KCONFIG_CONFIG
is an absolute path?" as discussed before:
https://patchwork.kernel.org/patch/9910037/
Since conf_write() is already messed up, I'd say "do not do it".
Please pass a file path all the time. If a directory path is specified
for the configuration output, conf_write() will simply error out.
Now that the tmp file is created in the same directory as the .config,
the previously reported "what if KCONFIG_CONFIG points to a different
file system?" has been solved.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Nicolas Porcel <nicolasporcel06@gmail.com>
There are still some trailing whitespaces under scripts/kconfig/tests/,
but they must be kept. Otherwise, "make testconfig" would break.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Although it's not required for the build *conf-cfg.sh scripts to be
executable (they're run by CONFIG_SHELL), let's be consistent with other
scripts.
Signed-off-by: Petr Vorel <pvorel@suse.cz>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Backspace is not working on some terminal emulators which do not send the
key code defined by terminfo. Terminals either send '^H' (8) or '^?' (127).
But currently only '^?' is handled. Let's also handle '^H' for those
terminals.
Signed-off-by: Changbin Du <changbin.du@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
When this .gitignore was added, lxdialog was an independent hostprogs-y.
Now that all objects in lxdialog/ are directly linked to mconf, the
lxdialog is no longer generated.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
The 'Save As' menu of xconfig is not working; it always saves the
kernel configuration into the default file irrespective of the file
chosen in the dialog box.
The 'Save' menu always writes into the default file, but it would
make more sense to write into the file previously chosen by 'Load'
or 'Save As'.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
If you run "make" in a pristine source tree, currently Kbuild will
start to build Kconfig to let it show the error message.
It would be more straightforward to check it in Makefile and let
it fail immediately.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
I accidentally dropped '*' in the previous renaming patch.
Revive it so that 'make mrproper' can clean the generated files.
Fixes: d86271af64 ("kconfig: rename generated .*conf-cfg to *conf-cfg")
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
You do not have to use define ... endef for filechk_* rules.
For simple cases, the use of assignment looks cleaner, IMHO.
I updated the usage for scripts/Kbuild.include in case somebody
misunderstands the 'define ... endif' is the requirement.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Fix the following warning:
no previous prototype for ‘dbg_sym_flags’ [-Wmissing-prototypes]
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Currently, images.c is included by qconf.cc and gconf.c.
qconf.cc uses all of xpm_* arrays, but gconf.c only some of them.
Hence, lots of "... defined but not used" warnings are displayed
while compiling gconf.c
Splitting out images.c fixes the warnings.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Add "static" to functions that are locally used in gconf.c
This fixes some "no previous prototype for ..." warnings.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
I want to compile each C file independently instead of including all
of them from zconf.y.
Split out confdata.c, expr.c, symbol.c, and preprocess.c .
These are low-hanging fruits.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
All files in lxdialog/ are licensed under GPL-2.0+, and the rest are
under GPL-2.0. I added GPL-2.0 tags to test scripts in tests/.
Documentation/process/license-rules.rst does not suggest anything
about the flex/bison files. Because flex does not accept the C++
comment style at the very top of a file, I used the C style for
zconf.l, and so for zconf.y for consistency.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Commit 7a88488bbc ("[PATCH] kconfig: use gperf for kconfig keywords")
introduced gperf for the keyword lookup.
Then, commit bb3290d916 ("Remove gperf usage from toolchain") killed
the gperf use. As a result, the linear keyword search was left behind.
If we do not use gperf, there is no reason to have the separate table
of the keywords. Move all keywords back to the lexer.
I also refactored the lexer to remove the COMMAND and PARAM states.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
To simplify the generated lexer, let the hand-made lexer update the
file name and line number for the parser.
I tested this with DEBUG_PARSE, and confirmed the same file names
and line numbers were dumped.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
The lexer has conventionally associated kconf_id data with yylval
to carry additional information to the parser.
No token is relying on this any more.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
T_ENDMENU, T_ENDCHOICE, T_ENDIF are the last users of kconf_id
associated with yylval. Refactor them to not use it.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
In my understanding, special characters such as '.' and '/' are
supported in unquoted words to use bare file paths in the "source"
statement.
With the previous commit surrounding all file paths with double
quotes, we can drop this.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
There is no grammatical ambiguity by using T_WORD for variables.
The parser can distinguish variables from symbols from the context.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Currently, the lexer returns T_ASSIGN for all of =, :=, and +=
associating yylval with the flavor.
I want to make the generated lexer as simple as possible. So, the
lexer should convert keywords to tokens without thinking about the
meaning.
= -> T_EQUAL
:= -> T_COLON_EQUAL
+= -> T_PLUS_EQUAL
Unfortunately, Kconfig uses = instead of == for the equal operator.
So, the same token T_EQUAL is used for assignment and comparison.
The parser can still distinguish them from the context.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
For the keywords "modules", "defconfig_list", and "allnoconfig_y",
the lexer should pass specific tokens instead of generic T_WORD.
This simplifies both the lexer and the parser.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
This commit removes kconf_id::stype to prepare for the entire
removal of kconf_id.c
To simplify the lexer, I want keywords straight-mapped to tokens.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Currently, "visible" and "depends on", if defined in a menu entry,
must appear in that order.
The real example is in drivers/media/tuners/Kconfig:
menu "Customize TV tuners"
visible if <expr1>
depends on <expr2>
... is fine, but you cannot change the property order like this:
menu "Customize TV tuners"
depends on <expr2>
visible if <expr1>
Kconfig does not require a specific order of properties. In this case,
menu_add_visibility(() and menu_add_dep() are orthogonal.
Loosen this unreasonable restriction.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
The code block surrounded by "menu" ... "endmenu" is stmt_list.
Remove the redundant menu_block symbol entirely.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
The code block surrounded by "if" ... "endif" is stmt_list.
Remove the redundant if_block symbol entirely.
Remove "stmt_list: stmt_list end" rule as well since it would
obviously cause conflicts.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
This commit decreases 6 shift/reduce conflicts, and finally achieves
conflict-free parser.
Since Kconfig has no terminator for a config block, detecting the end
of config_stmt is not easy.
For example, there are two ways for handling the error in the following
code:
1 config FOO
2 =
[A] Print "unknown option" error, assuming the line 2 is a part of
config_option_list
[B] Print "invalid statement", assuming the line 1 is reduced into
a config_stmt by itself
Bison actually chooses [A] because it performs the shift rather than
the reduction where both are possible.
However, there is no reason to choose one over the other.
Let's remove the option_error, and let it fall back to [B].
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
This commit decreases 15 shift/reduce conflicts.
The location of this error recovery is ambiguous.
For example, there are two ways to interpret the following code:
1 config FOO
2 bool "foo"
[A] Both lines are reduced together into a config_stmt.
[B] The only line 1 is reduced into a config_stmt, and the line 2
matches to "option_name error T_EOL"
Of course, we expect [A], but [B] could be grammatically possible.
Kconfig has no terminator for a config block. So, we cannot detect its
end until we see a non-property keyword. People often insert a blank
line between two config blocks, but it is just a coding convention.
Blank lines are actually allowed anywhere in Kconfig files.
The real error is when a property keyword appears right after "endif",
"endchoice", "endmenu", "source", "comment", or variable assignment.
Instead of fixing the grammatical ambiguity, I chose to simply remove
this error recovery.
The difference is
unexpected option "bool"
... is turned into a more generic message:
invalid statement
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
It would be nice to warn if a new line is missing at end of file.
We could do this by checkpatch.pl for arbitrary files, but new line
is rather essential as a statement terminator in Kconfig.
The warning message looks like this:
kernel/Kconfig.preempt:60:warning: no new line at end of file
Currently, kernel/Kconfig.preempt is the only file with no new line
at end of file. Fix it.
I know there are some false negative cases. For example, no warning
is displayed when the last line contains some whitespaces/comments,
but no new line. Yet, this commit works well for most cases.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
A new file should always start in the INITIAL state.
When the lexer bumps into EOF, the lexer must get back to the INITIAL
state anyway. Remove the redundant <<EOF>> pattern in the PARAM state.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
This commit decreases 8 shift/reduce conflicts.
A certain amount of grammatical ambiguity comes from how to reduce
excessive T_EOL tokens.
Let's take a look at the example code below:
1 config A
2 bool "a"
3
4 depends on B
5
6 config B
7 def_bool y
The line 3 is melt into "config_option_list", but the line 5 can be
either a part of "config_option_list" or "common_stmt" by itself.
Currently, the lexer converts '\n' to T_EOL verbatim. In Kconfig,
a new line works as a statement terminator, but new lines in empty
lines are not critical since empty lines (or lines that contain only
whitespaces/comments) are just no-op.
If the lexer simply discards no-op lines, the parser will not be
bothered by excessive T_EOL tokens.
Of course, this means we are shifting the complexity from the parser
to the lexer, but it is much easier than tackling on shift/reduce
conflicts.
I introduced the second stage lexer to tweak the behavior.
Discard T_EOL if the previous token is T_EOL or T_HELPTEXT.
Two T_EOL tokens in a row is meaningless. T_HELPTEXT is a special
token that is reduced without T_EOL.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Here, similar matching patters are duplicated in order to look ahead
the '\n' character. If the next character is '\n', the lexer returns
T_WORD_QUOTE because it must be prepared to return T_EOL at the next
match.
Use unput('\n') trick to reduce the code duplication.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
All line-oriented statements should be reduced when seeing a T_EOL
token. I guess missing T_EOL for the "visible" statement is just a
mistake. This commit decreases one shift/reduce conflict.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
An unterminated string literal followed by new line is passed to the
parser (with "multi-line strings not supported" warning shown), then
handled properly there.
On the other hand, an unterminated string literal at end of file is
never passed to the parser, then results in memory leak.
[Test Code]
----------(Kconfig begin)----------
source "Kconfig.inc"
config A
bool "a"
-----------(Kconfig end)-----------
--------(Kconfig.inc begin)--------
config B
bool "b\No new line at end of file
---------(Kconfig.inc end)---------
[Summary from Valgrind]
Before the fix:
LEAK SUMMARY:
definitely lost: 16 bytes in 1 blocks
...
After the fix:
LEAK SUMMARY:
definitely lost: 0 bytes in 0 blocks
...
Eliminate the memory leak path by handling this case. Of course, such
a Kconfig file is wrong already, so I will add an error message later.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Currently, warn_ignore_character() displays invalid file name and
line number.
The lexer should use current_file->name and yylineno, while the parser
should use zconf_curname() and zconf_lineno().
This difference comes from that the lexer is always going ahead
of the parser. The parser needs to look ahead one token to make a
shift/reduce decision, so the lexer is requested to scan more text
from the input file.
This commit fixes the warning message from warn_ignored_character().
[Test Code]
----(Kconfig begin)----
/
-----(Kconfig end)-----
[Output]
Before the fix:
<none>:0:warning: ignoring unsupported character '/'
After the fix:
Kconfig:1:warning: ignoring unsupported character '/'
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
The only possibility of k_invalid being returned was when
expr_parse_sting() parsed S_OTHER type symbol. This actually never
happened, and this is even clearer since S_OTHER has gone.
Clean up unreachable code.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
The S_OTHER type could be set only when conf_read_simple() is reading
include/config/auto.conf file.
For example, CONFIG_FOO=y exists in include/config/auto.conf but it is
missing from the currently parsed Kconfig files, sym_lookup() allocates
a new symbol, and sets its type to S_OTHER.
Strangely, it will be set to S_STRING by conf_set_sym_val() a few lines
below while it is obviously bool or tristate type. On the other hand,
when CONFIG_BAR="bar" is being dropped from include/config/auto.conf,
its type remains S_OTHER. Because for_all_symbols() omits S_OTHER
symbols, conf_touch_deps() misses to touch include/config/bar.h
This behavior has been a pretty mystery for me, and digging the git
histroy did not help. At least, touching depfiles is broken for string
type symbols.
I removed S_OTHER entirely, and reimplemented it more simply.
If CONFIG_FOO was visible in the previous syncconfig, but is missing
now, what we want to do is quite simple; just call conf_touch_dep()
to touch include/config/foo.h instead of allocating a new symbol data.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
conf_touch_deps() iterates over symbols, touching corresponding
include/config/*.h files as needed.
Split the part that touches a single file into a new helper so it can
be reused.
The new helper, conf_touch_dep(), takes a symbol name as a parameter,
and touches the corresponding include/config/*.h file.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
According to commit 2e3646e51b ("kconfig: integrate split config
into silentoldconfig"), this function was named after split-include
tool, which used to exist in old versions of Linux.
Setting aside the historical reason, rename it into a more intuitive
name. This function touches timestamp files under include/config/
in order to interact with the fixdep tool.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
The two 'goto setsym' statements are reachable only when sym == NULL.
The code below the 'setsym:' label does nothing when sym == NULL
since there is just one if-block guarded by 'if (sym && ...)'.
Hence, 'goto setsym' can be replaced with 'continue'.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
In today's merge_config.sh the order of the config fragment files dictates
the output of a config option. With this approach we will get different
.config files depending on the order of the config fragment files.
So doing something like:
$ ./merge/kconfig/merge_config.sh selftest.config drm.config
Where selftest.config defines DRM=y and drm.config defines DRM=m, the
result will be "DRM=m".
Rework to add a switch to get builtin '=y' precedence over modules '=m',
this will result in "DRM=y". If we do something like this:
$ ./merge/kconfig/merge_config.sh -y selftest.config drm.config
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
The current SED_CONFIG_EXP could match to comment lines in config
fragment files, especially when CONFIG_PREFIX_ is empty. For example,
Buildroot uses empty prefixing; starting symbols with BR2_ is just
convention.
Make the sed expression more robust against false positives from
comment lines. The new sed expression matches to only valid patterns.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Petr Vorel <petr.vorel@gmail.com>
Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
with CONFIG_ environment variable.
merge_config.sh uses CONFIG_ which is used in kernel and other projects.
There are some projects which use kconfig with different prefixes (e.g.
buildroot: BR2_ prefix). CONFIG_ variable is already used for this
purpose in kconfig binary (scripts/kconfig/lkc.h), let's use the same
rule for in merge_config.sh.
Suggested-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Petr Vorel <petr.vorel@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
As commit 911a91c39c ("kconfig: rename silentoldconfig to
syncconfig") announced, it is time for the removal.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
As commit 312ee68752 ("kconfig: announce removal of oldnoconfig if
used") announced, it is time for the removal.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Meelis Roos reported a {menu,n}config regression:
"I have libncurses devel package installed in the default system
location (as do 99%+ on actual developers probably) and in this
case, pkg-config is useless. pkg-config is needed only when
libraries and headers are installed in non-default locations but
it is bad to require installation of pkg-config on all the machines
where make menuconfig would be possibly run."
For {menu,n}config, do not use pkg-config if it is not installed.
For {g,x}config, keep checking pkg-config since we really rely on it
for finding the installation paths of the required packages.
Fixes: 4ab3b80159 ("kconfig: check for pkg-config on make {menu,n,g,x}config")
Reported-by: Meelis Roos <mroos@linux.ee>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Tested-by: Meelis Roos <mroos@linux.ee>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
The self assignment was probably introduced by an automated code
refactoring in
commit 694c49a7c0 ("kconfig: drop localization support").
The issue was identified by a self-assign warning when running
make menuconfig with clang.
Fixes: 694c49a7c0 ("kconfig: drop localization support")
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
The top-level Makefile invokes "make syncconfig" when necessary.
Then, Kconfig displays the following message when .config is updated.
#
# configuration written to .config
#
It is distracting because "make syncconfig" happens during the build
stage, and does nothing important in most cases.
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
This commit improves the messages of the recursive dependency.
Currently, sym->dir_dep.expr is not checked. Hence, any dependency
in property visibility is regarded as the dependency of the symbol.
[Test Code 1]
config A
bool "a"
depends on B
config B
bool "b"
depends on A
[Test Code 2]
config A
bool "a" if B
config B
bool "b"
depends on A
For both cases above, the same message is displayed:
symbol B depends on A
symbol A depends on B
This commit changes the message for the latter, like this:
symbol B depends on A
symbol A prompt is visible depending on B
Also, 'select' and 'imply' are distinguished.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Tested-by: Dirk Gouders <dirk@gouders.net>
Currently, Kconfig does not complain about the recursive dependency
where 'imply' keywords are involved.
[Test Code]
config A
bool "a"
config B
bool "b"
imply A
depends on A
In the code above, Kconfig cannot calculate the symbol values correctly
due to the circular dependency. For example, allyesconfig followed by
syncconfig results in an odd behavior because CONFIG_B becomes visible
in syncconfig.
$ make allyesconfig
scripts/kconfig/conf --allyesconfig Kconfig
#
# configuration written to .config
#
$ cat .config
#
# Automatically generated file; DO NOT EDIT.
# Main menu
#
CONFIG_A=y
$ make syncconfig
scripts/kconfig/conf --syncconfig Kconfig
*
* Restart config...
*
*
* Main menu
*
a (A) [Y/n/?] y
b (B) [N/y/?] (NEW)
To detect this correctly, sym_check_expr_deps() should recurse to
not only sym->rev_dep.expr but also sym->implied.expr .
At this moment, sym_check_print_recursive() cannot distinguish
'select' and 'imply' since it does not know the precise context
where the recursive dependency has been hit. This will be solved
by the next commit.
In fact, even the document and the unit-test are confused. Using
'imply' does not solve recursive dependency since 'imply' addresses
the unmet direct dependency, which 'select' could cause.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Tested-by: Dirk Gouders <dirk@gouders.net>
Originally, recursive dependency was a fatal error for Kconfig
because Kconfig cannot compute symbol values in such a situation.
Commit d595cea624 ("kconfig: print more info when we see a recursive
dependency") changed it to a warning, which I guess was not intentional.
Get it back to an error again.
Also, rename the unit test directory "warn_recursive_dep" to
"err_recursive_dep" so that it matches to the behavior.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Tested-by: Dirk Gouders <dirk@gouders.net>
Add build-only targets for build_menuconfig, build_nconfig,
build_xconfig, and build_gconfig.
(targets must end in "config" to qualify in top-level Makefile)
This allows these target to be built without execution (e.g., to
look for errors or warnings) and/or to be built and checked by sparse.
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
- show clearer error messages where pkg-config is needed, but not
installed
- rename SYMBOL_AUTO to SYMBOL_NO_WRITE to reflect its semantics
- create all necessary directories by Kconfig tool itself instead
of Makefile
- update the .config unconditionally when syncconfig is invoked
- use 'include' directive instead of '-include' where
include/config/{auto,tristate}.conf is mandatory
- do not try to update the .config when running install targets
- add .DELETE_ON_ERROR to delete partially updated files
- misc cleanups and fixes
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Merge tag 'kconfig-v4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kconfig updates from Masahiro Yamada:
- show clearer error messages where pkg-config is needed, but not
installed
- rename SYMBOL_AUTO to SYMBOL_NO_WRITE to reflect its semantics
- create all necessary directories by Kconfig tool itself instead of
Makefile
- update the .config unconditionally when syncconfig is invoked
- use 'include' directive instead of '-include' where
include/config/{auto,tristate}.conf is mandatory
- do not try to update the .config when running install targets
- add .DELETE_ON_ERROR to delete partially updated files
- misc cleanups and fixes
* tag 'kconfig-v4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
kconfig: remove P_ENV property type
kconfig: remove unused sym_get_env_prop() function
kconfig: fix the rule of mainmenu_stmt symbol
init/Kconfig: Use short unix-style option instead of --longname
Kbuild: Makefile.modbuiltin: include auto.conf and tristate.conf mandatory
kbuild: remove auto.conf from prerequisite of phony targets
kbuild: do not update config for 'make kernelrelease'
kbuild: do not update config when running install targets
kbuild: add .DELETE_ON_ERROR special target
kbuild: use 'include' directive to load auto.conf from top Makefile
kconfig: allow all config targets to write auto.conf if missing
kconfig: make syncconfig update .config regardless of sym_change_count
kconfig: create directories needed for syncconfig by itself
kconfig: remove unneeded directory generation from local*config
kconfig: split out useful helpers in confdata.c
kconfig: rename file_write_dep and move it to confdata.c
kconfig: fix typos in description of "choice" in kconfig-language.txt
kconfig: handle format string before calling conf_message_callback()
kconfig: rename SYMBOL_AUTO to SYMBOL_NO_WRITE
kconfig: check for pkg-config on make {menu,n,g,x}config
This property is not set by anyone since commit 104daea149 ("kconfig:
reference environment variables directly and remove 'option env='").
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
This function is unused since commit 104daea149 ("kconfig: reference
environment variables directly and remove 'option env='").
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
The rule of mainmenu_stmt does not have debug print of zconf_lineno(),
but if it had, it would print a wrong line number for the same reason
as commit b2d00d7c61 ("kconfig: fix line numbers for if-entries in
menu tree").
The mainmenu_stmt does not need to eat following empty lines because
they are reduced to common_stmt.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Currently, only syncconfig creates or updates include/config/auto.conf
and some other files. Other config targets create or update only the
.config file.
When you configure and build the kernel from a pristine source tree,
any config target is followed by syncconfig in the build stage since
include/config/auto.conf is missing.
We are moving compiler tests from Makefile to Kconfig. It means that
parsing Kconfig files will be more costly since Kconfig invokes the
compiler commands internally. Thus, we want to avoid invoking Kconfig
twice (one for *config to create the .config, and one for syncconfig
to synchronize the auto.conf). If auto.conf does not exist, we can
generate all configuration files in the first configuration stage,
which will save the syncconfig in the build stage.
Please note this should be done only when auto.conf is missing. If
*config blindly did this, time stamp files under include/config/ would
be unnecessarily touched, triggering unneeded rebuild of objects.
I assume a scenario like this:
1. You have a source tree that has already been built
with CONFIG_FOO disabled
2. Run "make menuconfig" to enable CONFIG_FOO
3. CONFIG_FOO turns out to be unnecessary.
Run "make menuconfig" again to disable CONFIG_FOO
4. Run "make"
In this case, include/config/foo.h should not be touched since there
is no change in CONFIG_FOO. The sync process should be delayed until
the user really attempts to build the kernel.
This commit has another motivation; I want to suppress the 'No such
file or directory' warning from the 'include' directive.
The top-level Makefile includes auto.conf with '-include' directive,
like this:
ifeq ($(dot-config),1)
-include include/config/auto.conf
endif
This looks strange because auto.conf is mandatory when dot-config is 1.
I guess only the reason of using '-include' is to suppress the warning
'include/config/auto.conf: No such file or directory' when building
from a clean tree. However, this has a side-effect; Make considers
the files included by '-include' are optional. Hence, Make continues
to build even if it fails to generate include/config/auto.conf. I will
change this in the next commit, but the warning message is annoying.
(At least, kbuild test robot reports it as a regression.)
With this commit, Kconfig will generate all configuration files together
with the .config and I guess it is a solution good enough to suppress
the warning.
Note:
GNU Make 4.2 or later does not display the warning from the 'include'
directive if include files are successfully generated. See GNU Make
commit 87a5f98d248f ("[SV 102] Don't show unnecessary include file
errors.") However, older GNU Make versions are still widely used.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
syncconfig updates the .config only when sym_change_count > 0, i.e.
any change in config symbols has been detected.
Not only symbols but also comments are contained in the .config file.
If only comments are updated, they are not fed back to the .config,
then the stale comments are left-over. Of course, this is just a
matter of comments, but why not fix it.
I see some scenarios where this happens.
Scenario A:
1. You have a source tree that has already been configured.
2. Linus increments the version number in the top-level Makefile
(i.e. he commits a new release)
3. You pull it, and run 'make'
4. syncconfig is invoked because the environment variable,
KERNELVERSION is updated, but the .config is not updated since
no config symbol is changed.
5. The .config file contains a kernel version in the top line:
# Automatically generated file; DO NOT EDIT.
# Linux/arm64 4.18.0-rc2 Kernel Configuration
... which points to a previous version.
Scenario B:
1. You have a source tree that has already been configured.
2. You upgrade the compiler, but it still has the same version number.
This may happen if you regularly build the latest compiler from
the source code.
3. You run 'make'
4. syncconfig is invoked because the environment variable,
CC_VERSION_TEXT is updated, but the .config is not updated since
no config symbol is changed.
5. The .config file contains the version string of the compiler:
#
# Compiler: aarch64-linux-gcc (GCC) 9.0.0 20180628 (experimental)
#
... which carries the information of the old compiler.
If KCONFIG_NOSILENTUPDATE is set, syncconfig is not allowed to update
the .config file. Otherwise, it is fine to update it regardless of
sym_change_count.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
'make syncconfig' creates some files such as include/config/auto.conf,
include/generate/autoconf.h, etc. but the necessary directory creation
relies on scripts/kconfig/Makefile.
To make Kconfig self-contained, create directories as needed in
conf_write_autoconf().
This change allows scripts/kconfig/Makefile cleanups; syncconfig can
be merged into simple-targets.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Commit 17263baf95 ("kconfig: Create include/generated for
localmodconfig") added the 'mkdir' line because local{yes,mod}config
ran streamline_config.pl followed by silentoldconfig at that time.
Since commit 81d2bc2273 ("kconfig: invoke oldconfig instead of
silentoldconfig from local*config"), no sub-directory is required.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Split out helpers:
is_present() - check if the given path exists
is_dir() - check if the given path exists and it is a directory
make_parent_dir() - create the parent directories of the given path
These helpers will be reused in later commits.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
file_write_dep() is called only from conf_write_autoconf().
Move it from util.c to confdata.c to make it static.
Also, rename it to conf_write_dep() since it should belong to
the group of conf_write* functions.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
As you see in mconf.c and nconf.c, conf_message_callback() hooks are
likely to end up with the boilerplate of vsnprintf(). Process the
string format before calling conf_message_callback() so that it
receives a simple string.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Dirk Gouders <dirk@gouders.net>
Over time, the use of the flag SYMBOL_AUTO changed from initially
marking three automatically generated symbols ARCH, KERNELRELEASE and
UNAME_RELEASE to today's effect of protecting symbols from being
written out.
Currently, only symbols of type CHOICE and those with option
defconf_list set have that flag set.
Reflect that change in semantics in the flag's name.
Signed-off-by: Dirk Gouders <dirk@gouders.net>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Each of 'make {menu,n,g,x}config' uses (needs) pkg-config to make sure
that other required files are present and to determine build flags
settings, but none of these check that pkg-config itself is present.
Add a check for all 4 of these targets and update
Documentation/process/changes.rst to mention 'pkg-config'.
Fixes kernel bugzilla #77511:
https://bugzilla.kernel.org/show_bug.cgi?id=77511
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Bjørn Forsman <bjorn.forsman@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
In preparation for enabling command line LDLIBS, re-name HOST_LOADLIBES
to KBUILD_HOSTLDLIBS as the internal use only flags. Also rename
existing usage to HOSTLDLIBS for consistency. This should not have any
visible effects.
Signed-off-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
If buf[-1] just happens to hold the byte 0x0A, then nread can wrap around
to (size_t)-1, leading to invalid memory accesses.
This has caused segmentation faults when trying to build the latest
kernel snapshots for i686 in Fedora:
https://bugzilla.redhat.com/show_bug.cgi?id=1592374
Signed-off-by: Jerry James <loganjerry@gmail.com>
[alexpl@fedoraproject.org: reformatted patch for submission]
Signed-off-by: Alexander Ploumistos <alexpl@fedoraproject.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Each symbol has a property of type P_SYMBOL since commit
59e89e3ddf (kconfig: save location of config symbols).
Handle those properties in print_symbol().
Further, place a pointer to print_symbol() in the comment above the
list of known property type.
Signed-off-by: Dirk Gouders <dirk@gouders.net>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
The line numers for if-entries in the menu tree are off by one or more
lines which is confusing when debugging for correctness of unrelated changes.
According to the git log, commit a02f0570ae (kconfig: improve
error handling in the parser) was the last one that changed that part
of the parser and replaced
"if_entry: T_IF expr T_EOL"
by
"if_entry: T_IF expr nl"
but the commit message does not state why this has been done.
When reverting that part of the commit, only the line numers are
corrected (checked with cdebug = DEBUG_PARSE in zconf.y), otherwise
the menu tree remains unchanged (checked with zconfdump() enabled in
conf.c).
An example for the corrected line numbers:
drivers/soc/Kconfig:15:source drivers/soc/tegra/Kconfig
drivers/soc/tegra/Kconfig:4:if
drivers/soc/tegra/Kconfig:6:if
changes to:
drivers/soc/Kconfig:15:source drivers/soc/tegra/Kconfig
drivers/soc/tegra/Kconfig:1:if
drivers/soc/tegra/Kconfig:4:if
Signed-off-by: Dirk Gouders <dirk@gouders.net>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
When kconfig syntax moved to use $(FOO) for environment variables
localmodconfig was not updated.
Fix so it now works with the new syntax $(FOO)
Fixes: 104daea149 ("kconfig: reference environment variables directly and remove 'option env='")
Reported-by: Kevin Locke <kevin@kevinlocke.name>
Reported-by: Andrei Vagin <avagin@virtuozzo.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Tested-by: Kevin Locke <kevin@kevinlocke.name>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
In file included from scripts/kconfig/zconf.tab.c:2485:
scripts/kconfig/confdata.c: In function ‘conf_write’:
scripts/kconfig/confdata.c:773:22: warning: ‘%s’ directive writing likely 7 or more bytes into a region of size between 1 and 4097 [-Wformat-overflow=]
sprintf(newname, "%s%s", dirname, basename);
^~
scripts/kconfig/confdata.c:773:19: note: assuming directive output of 7 bytes
sprintf(newname, "%s%s", dirname, basename);
^~~~~~
scripts/kconfig/confdata.c:773:2: note: ‘sprintf’ output 1 or more bytes (assuming 4104) into a destination of size 4097
sprintf(newname, "%s%s", dirname, basename);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
scripts/kconfig/confdata.c:776:23: warning: ‘.tmpconfig.’ directive writing 11 bytes into a region of size between 1 and 4097 [-Wformat-overflow=]
sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
^~~~~~~~~~~
scripts/kconfig/confdata.c:776:3: note: ‘sprintf’ output between 13 and 4119 bytes into a destination of size 4097
sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Increase the size of tmpname and newname to make GCC happy.
Cc: stable@vger.kernel.org
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
When using a recursively expanded variable, it is a common mistake
to make circular reference.
For example, Make terminates the following code:
X = $(X)
Y := $(X)
Let's detect the circular expansion in Kconfig, too.
On the other hand, a function that recurses itself is a commonly-used
programming technique. So, Make does not check recursion in the
reference with 'call'. For example, the following code continues
running eternally:
X = $(call X)
Y := $(X)
Kconfig allows circular expansion if one or more arguments are given,
but terminates when the same function is recursively invoked 1000 times,
assuming it is a programming mistake.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
The special variables, $(filename) and $(lineno), are expanded to a
file name and its line number being parsed, respectively.
Suggested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Syntax:
$(info,<text>)
$(warning-if,<condition>,<text>)
$(error-if,<condition>,<text)
The 'info' function prints a message to stdout as in Make.
The 'warning-if' and 'error-if' are similar to 'warning' and 'error'
in Make, but take the condition parameter. They are effective only
when the <condition> part is y.
Kconfig does not implement the lazy expansion as used in the 'if'
'and, 'or' functions in Make. In other words, Kconfig does not
support conditional expansion. The unconditional 'error' function
would always terminate the parsing, hence would be useless in Kconfig.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Make expands the lefthand side of assignment statements. In fact,
Kbuild relies on it since kernel makefiles mostly look like this:
obj-$(CONFIG_FOO) += foo.o
Do likewise in Kconfig.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Support += operator. This appends a space and the text on the
righthand side to a variable.
The timing of the evaluation of the righthand side depends on the
flavor of the variable. If the lefthand side was originally defined
as a simple variable, the righthand side is expanded immediately.
Otherwise, the expansion is deferred. Appending something to an
undefined variable results in a recursive variable.
To implement this, we need to remember the flavor of variables.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
The previous commit added variable and user-defined function. They
work similarly in the sense that the evaluation is deferred until
they are used.
This commit adds another type of variable, simply expanded variable,
as we see in Make.
The := operator defines a simply expanded variable, expanding the
righthand side immediately. This works like traditional programming
language variables.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Now, we got a basic ability to test compiler capability in Kconfig.
config CC_HAS_STACKPROTECTOR
def_bool $(shell,($(CC) -Werror -fstack-protector -E -x c /dev/null -o /dev/null 2>/dev/null) && echo y || echo n)
This works, but it is ugly to repeat this long boilerplate.
We want to describe like this:
config CC_HAS_STACKPROTECTOR
bool
default $(cc-option,-fstack-protector)
It is straight-forward to add a new function, but I do not like to
hard-code specialized functions like that. Hence, here is another
feature, user-defined function. This works as a textual shorthand
with parameterization.
A user-defined function is defined by using the = operator, and can
be referenced in the same way as built-in functions. A user-defined
function in Make is referenced like $(call my-func,arg1,arg2), but I
omitted the 'call' to make the syntax shorter.
The definition of a user-defined function contains $(1), $(2), etc.
in its body to reference the parameters. It is grammatically valid
to pass more or fewer arguments when calling it. We already exploit
this feature in our makefiles; scripts/Kbuild.include defines cc-option
which takes two arguments at most, but most of the callers pass only
one argument.
By the way, a variable is supported as a subset of this feature since
a variable is "a user-defined function with zero argument". In this
context, I mean "variable" as recursively expanded variable. I will
add a different flavored variable in the next commit.
The code above can be written as follows:
[Example Code]
success = $(shell,($(1)) >/dev/null 2>&1 && echo y || echo n)
cc-option = $(success,$(CC) -Werror $(1) -E -x c /dev/null -o /dev/null)
config CC_HAS_STACKPROTECTOR
def_bool $(cc-option,-fstack-protector)
[Result]
$ make -s alldefconfig && tail -n 1 .config
CONFIG_CC_HAS_STACKPROTECTOR=y
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Currently, any statement line starts with a keyword with TF_COMMAND
flag. So, the following three lines are dead code.
alloc_string(yytext, yyleng);
zconflval.string = text;
return T_WORD;
If a T_WORD token is returned in this context, it will cause syntax
error in the parser anyway.
The next commit will support the assignment statement where a line
starts with an arbitrary identifier. So, I want the lexer to switch
to the PARAM state only when it sees a command keyword.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
This accepts a single command to execute. It returns the standard
output from it.
[Example code]
config HELLO
string
default "$(shell,echo hello world)"
config Y
def_bool $(shell,echo y)
[Result]
$ make -s alldefconfig && tail -n 2 .config
CONFIG_HELLO="hello world"
CONFIG_Y=y
Caveat:
Like environments, functions are expanded in the lexer. You cannot
pass symbols to function arguments. This is a limitation to simplify
the implementation. I want to avoid the dynamic function evaluation,
which would introduce much more complexity.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
This commit adds a new concept 'function' to do more text processing
in Kconfig.
A function call looks like this:
$(function,arg1,arg2,arg3,...)
This commit adds the basic infrastructure to expand functions.
Change the text expansion helpers to take arguments.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
If "mainmenu" is not specified, "Linux Kernel Configuration" is used
as a default prompt.
Given that Kconfig is used in other projects than Linux, let's use
a more generic prompt, "Main menu".
Suggested-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
There is no more caller of sym_expand_string_value().
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Now that environments are expanded in the lexer, conf_parse() does
not need to expand them explicitly.
The hack introduced by commit 0724a7c32a ("kconfig: Don't leak
main menus during parsing") can go away.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
There are two callers of file_lookup(), but there is no more reason
to expand the given path.
[1] zconf_initscan()
This is used to open the first Kconfig. sym_expand_string_value()
has never been used in a useful way here; before opening the first
Kconfig file, obviously there is no symbol to expand. If you use
expand_string_value() instead, environments in KBUILD_KCONFIG would
be expanded, but I do not see practical benefits for that.
[2] zconf_nextfile()
This is used to open the next file from 'source' statement.
Symbols in the path like "arch/$SRCARCH/Kconfig" needed expanding,
but it was replaced with the direct environment expansion. The
environment has already been expanded before the token is passed
to the parser.
By the way, file_lookup() was already buggy; it expanded a given path,
but it used the path before expansion for look-up:
if (!strcmp(name, file->name)) {
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
To get access to environment variables, Kconfig needs to define a
symbol using "option env=" syntax. It is tedious to add a symbol entry
for each environment variable given that we need to define much more
such as 'CC', 'AS', 'srctree' etc. to evaluate the compiler capability
in Kconfig.
Adding '$' for symbol references is grammatically inconsistent.
Looking at the code, the symbols prefixed with 'S' are expanded by:
- conf_expand_value()
This is used to expand 'arch/$ARCH/defconfig' and 'defconfig_list'
- sym_expand_string_value()
This is used to expand strings in 'source' and 'mainmenu'
All of them are fixed values independent of user configuration. So,
they can be changed into the direct expansion instead of symbols.
This change makes the code much cleaner. The bounce symbols 'SRCARCH',
'ARCH', 'SUBARCH', 'KERNELVERSION' are gone.
sym_init() hard-coding 'UNAME_RELEASE' is also gone. 'UNAME_RELEASE'
should be replaced with an environment variable.
ARCH_DEFCONFIG is a normal symbol, so it should be simply referenced
without '$' prefix.
The new syntax is addicted by Make. The variable reference needs
parentheses, like $(FOO), but you can omit them for single-letter
variables, like $F. Yet, in Makefiles, people tend to use the
parenthetical form for consistency / clarification.
At this moment, only the environment variable is supported, but I will
extend the concept of 'variable' later on.
The variables are expanded in the lexer so we can simplify the token
handling on the parser side.
For example, the following code works.
[Example code]
config MY_TOOLCHAIN_LIST
string
default "My tools: CC=$(CC), AS=$(AS), CPP=$(CPP)"
[Result]
$ make -s alldefconfig && tail -n 1 .config
CONFIG_MY_TOOLCHAIN_LIST="My tools: CC=gcc, AS=as, CPP=gcc -E"
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
The localization support is broken and appears unused.
There is no google hits on the update-po-config target.
And there is no recent (5 years) activity related to the localization.
So lets just drop this as it is no longer used.
Suggested-by: Ulf Magnusson <ulfalizer@gmail.com>
Suggested-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
The mconf (or its infrastructure, lxdiaglog) depends on the ncurses.
Move and rename check-lxdialog.sh to mconf-cfg.sh to make it work in
the same way as for qconf and gconf.
This commit fixes some more weirdnesses.
The nconf also needs ncurses packages. HOSTLOADLIBES_nconf is set
to the libraries needed for nconf, but the cflags is not explicitly
set. Actually, nconf relies on the check-lxdialog.sh for the proper
cflags:
HOST_EXTRACFLAGS += $(shell $(CONFIG_SHELL) $(check-lxdialog) -ccflags) \
-DLOCALE
The code above passes the ncurses flags to all objects, even for conf,
qconf, gconf. Let's pass the ncurses flags only to mconf and nconf.
Currently, the presence of ncurses is not checked for nconf. Let's
show a prompt like the mconf case.
According to Randy's report, the shell scripts still need to carry
the fallback code in case the pkg-config fails to find the ncurses
packages.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Refactor the package checks for gconf in the same way as for qconf.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Currently, the necessary package checks for building qconf is
surrounded by ifeq ($(MAKECMDGOALS),xconfig) ... endif.
Then, Make will restart when .tmp_qtcheck is generated.
To simplify the Makefile, move the scripting to a separate file,
and use filechk. The shell script is executed everytime xconfig
is run, but it is not a costly script.
In the old code, 'pkg-config --exists' only checked Qt5Core / QtCore,
but the set of necessary packages should be checked.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
We at Red Hat/Fedora have generally tried to have a per file breakdown of
every config option we set. This makes it easy for us to add new options
when they are exposed and keep a changelog of why they were set.
A Fedora example is here:
https://src.fedoraproject.org/cgit/rpms/kernel.git/tree/configs/fedora/generic
Using various merge scripts, we build up a config file and run it through
'make listnewconfig' and 'make oldnoconfig'. The idea is to print out new
config options that haven't been manually set and use the default until
a patch is posted to set it properly.
To speed things up, it would be nice to make it easier to generate a
patch to post the default setting. The output of 'make listnewconfig'
has two issues that limit us:
- it doesn't provide the default value
- it doesn't provide the new 'choice' options that get flagged in
'oldconfig'
This patch extends 'listnewconfig' to address the above two issues.
This allows us to run a script
make listnewconfig | rhconfig-tool -o patches; git send-email patches/
The output of 'make listnewconfig':
CONFIG_NET_EMATCH_IPT
CONFIG_IPVLAN
CONFIG_ICE
CONFIG_NET_VENDOR_NI
CONFIG_IEEE802154_MCR20A
CONFIG_IR_IMON_DECODER
CONFIG_IR_IMON_RAW
The new output of 'make listnewconfig':
CONFIG_KERNEL_XZ=n
CONFIG_KERNEL_LZO=n
CONFIG_NET_EMATCH_IPT=n
CONFIG_IPVLAN=n
CONFIG_ICE=n
CONFIG_NET_VENDOR_NI=y
CONFIG_IEEE802154_MCR20A=n
CONFIG_IR_IMON_DECODER=n
CONFIG_IR_IMON_RAW=n
Signed-off-by: Don Zickus <dzickus@redhat.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Files generated by if_changed* must be added to 'targets' to include
*.cmd files. Otherwise, they would be regenerated every time.
The build system automatically adds objects to 'targets' where
appropriate, such as obj-y, extra-y, etc. but does nothing for
intermediate files. So, each Makefile needs to add them by itself.
There are some common cases where objects are generated by chained
rules. Lexers and parsers are compiled like follows:
%.lex.o <- %.lex.c <- %.l
%.tab.o <- %.tab.c <- %.y
They are common patterns, so it is reasonable to take care of them
in the core Makefile instead of requiring each Makefile to do so.
At this moment, you cannot delete 'target += zconf.lex.c' in the
Kconfig Makefile because zconf.lex.c is included from zconf.tab.c
instead of being compiled separately. It should be deleted after
Kconfig is more refactored.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Frank Rowand <frowand.list@gmail.com>
Files suffixed by .lex.c, .tab.[ch] are generated lexers, parsers,
respectively. Clean them up globally from the top Makefile.
Some of the final host programs those lexer/parser are linked into
are necessary for building external modules, but the intermediates
are unneeded. They can be cleaned away by 'make clean' instead of
'make mrproper'.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Frank Rowand <frowand.list@gmail.com>
These patterns are common to host programs that require lexer and parser.
Move them to the top .gitignore.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Frank Rowand <frowand.list@gmail.com>
- improve checkpatch for more precise Kconfig code checking
- clarify effective selects by grouping reverse dependencies in help
- do not write out '# CONFIG_FOO is not set' from invisible symbols
- make oldconfig as silent as it should be
- rename 'silentoldconfig' to 'syncconfig'
- add unit-test framework and several test cases
- warn unmet dependency of tristate symbols
- make unmet dependency warnings readable, removing false positives
- improve recursive include detection
- use yylineno to simplify the line number tracking
- misc cleanups
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Merge tag 'kconfig-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kconfig updates from Masahiro Yamada:
- improve checkpatch for more precise Kconfig code checking
- clarify effective selects by grouping reverse dependencies in help
- do not write out '# CONFIG_FOO is not set' from invisible symbols
- make oldconfig as silent as it should be
- rename 'silentoldconfig' to 'syncconfig'
- add unit-test framework and several test cases
- warn unmet dependency of tristate symbols
- make unmet dependency warnings readable, removing false positives
- improve recursive include detection
- use yylineno to simplify the line number tracking
- misc cleanups
* tag 'kconfig-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (30 commits)
kconfig: use yylineno option instead of manual lineno increments
kconfig: detect recursive inclusion earlier
kconfig: remove duplicated file name and lineno of recursive inclusion
kconfig: do not include both curses.h and ncurses.h for nconfig
kconfig: make unmet dependency warnings readable
kconfig: warn unmet direct dependency of tristate symbols selected by y
kconfig: tests: test if recursive inclusion is detected
kconfig: tests: test if recursive dependencies are detected
kconfig: tests: test randconfig for choice in choice
kconfig: tests: test defconfig when two choices interact
kconfig: tests: check visibility of tristate choice values in y choice
kconfig: tests: check unneeded "is not set" with unmet dependency
kconfig: tests: test if new symbols in choice are asked
kconfig: tests: test automatic submenu creation
kconfig: tests: add basic choice tests
kconfig: tests: add framework for Kconfig unit testing
kbuild: add PYTHON2 and PYTHON3 variables
kconfig: remove redundant streamline_config.pl prerequisite
kconfig: rename silentoldconfig to syncconfig
kconfig: invoke oldconfig instead of silentoldconfig from local*config
...
Tracking the line number by hand is error-prone since you need to
increment it in every \n matching pattern.
If '%option yylineno' is set, flex defines 'yylineno' to contain the
current line number and automatically updates it each time it reads a
\n character. This is much more convenient although the lexer does
not initializes yylineno, so you need to set it to 1 each time you
start reading a new file, and restore it you go back to the previous
file.
I tested this with DEBUG_PARSE, and confirmed the same dump message
was produced.
I removed the perf-report option. Otherwise, I see the following
message:
%option yylineno entails a performance penalty ONLY on rules that
can match newline characters
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Currently, the recursive inclusion is not detected when the offending
file is about to be included; it is detected the offending file is
about to include the *next* file. This is because the detection loop
does not involve the file being included.
Do this check against the file that is about to be included so that
the recursive inclusion is detected before unneeded parsing happens.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
As in the unit test, the error message for the recursive inclusion
looks like this:
Kconfig.inc1:4: recursive inclusion detected. Inclusion path:
current file : 'Kconfig.inc1'
included from: 'Kconfig.inc3:1'
included from: 'Kconfig.inc2:3'
included from: 'Kconfig.inc1:4'
The 'Kconfig.inc1:4' is duplicated in the first and last lines.
Also, the single quotes do not help readability.
Change the message like follows:
Recursive inclusion detected.
Inclusion path:
current file : Kconfig.inc1
included from: Kconfig.inc3:1
included from: Kconfig.inc2:3
included from: Kconfig.inc1:4
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
nconf.h includes <curses.h> and "ncurses.h", but it does not need to
include both. Generally, it should fall back to curses.h only when
ncurses.h is not found. But, looks like it has never happened;
these includes have been here for many years since commit 692d97c380
("kconfig: new configuration interface (nconfig)"), and nobody has
complained about hard-coding of ncurses.h . Let's simply drop the
curses.h inclusion.
I replaced "ncurses.h" with <ncurses.h> since it is not a local file.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Currently, the unmet dependency warnings end up with endlessly long
expressions, most of which are false positives.
Here is test code to demonstrate how it currently works.
[Test Case]
config DEP1
def_bool y
config DEP2
bool "DEP2"
config A
bool "A"
select E
config B
bool "B"
depends on DEP2
select E
config C
bool "C"
depends on DEP1 && DEP2
select E
config D
def_bool n
select E
config E
bool
depends on DEP1 && DEP2
[Result]
$ make config
scripts/kconfig/conf --oldaskconfig Kconfig
*
* Linux Kernel Configuration
*
DEP2 (DEP2) [N/y/?] (NEW) n
A (A) [N/y/?] (NEW) y
warning: (A && B && D) selects E which has unmet direct
dependencies (DEP1 && DEP2)
Here, I see some points to be improved.
First, '(A || B || D)' would make more sense than '(A && B && D)'.
I am not sure if this is intentional, but expr_simplify_unmet_dep()
turns OR expressions into AND, like follows:
case E_OR:
return expr_alloc_and(
Second, we see false positives. 'A' is a real unmet dependency.
'B' is false positive because 'DEP1' is fixed to 'y', and 'B' depends
on 'DEP2'. 'C' was correctly dropped by expr_simplify_unmet_dep().
'D' is also false positive because it has no chance to be enabled.
Current expr_simplify_unmet_dep() cannot avoid those false positives.
After all, I decided to use the same helpers as used for printing
reverse dependencies in the help.
With this commit, unreadable warnings (most of the reported symbols are
false positives) in the real world:
$ make ARCH=score allyesconfig
scripts/kconfig/conf --allyesconfig Kconfig
warning: (HWSPINLOCK_QCOM && AHCI_MTK && STMMAC_PLATFORM &&
DWMAC_IPQ806X && DWMAC_LPC18XX && DWMAC_OXNAS && DWMAC_ROCKCHIP &&
DWMAC_SOCFPGA && DWMAC_STI && TI_CPSW && PINCTRL_GEMINI &&
PINCTRL_OXNAS && PINCTRL_ROCKCHIP && PINCTRL_DOVE &&
PINCTRL_ARMADA_37XX && PINCTRL_STM32 && S3C2410_WATCHDOG &&
VIDEO_OMAP3 && VIDEO_S5P_FIMC && USB_XHCI_MTK && RTC_DRV_AT91SAM9 &&
LPC18XX_DMAMUX && VIDEO_OMAP4 && COMMON_CLK_GEMINI &&
COMMON_CLK_ASPEED && COMMON_CLK_NXP && COMMON_CLK_OXNAS &&
COMMON_CLK_BOSTON && QCOM_ADSP_PIL && QCOM_Q6V5_PIL && QCOM_GSBI &&
ATMEL_EBI && ST_IRQCHIP && RESET_IMX7 && PHY_HI6220_USB &&
PHY_RALINK_USB && PHY_ROCKCHIP_PCIE && PHY_DA8XX_USB) selects
MFD_SYSCON which has unmet direct dependencies (HAS_IOMEM)
warning: (PINCTRL_AT91 && PINCTRL_AT91PIO4 && PINCTRL_OXNAS &&
PINCTRL_PISTACHIO && PINCTRL_PIC32 && PINCTRL_MESON &&
PINCTRL_NOMADIK && PINCTRL_MTK && PINCTRL_MT7622 && GPIO_TB10X)
selects OF_GPIO which has unmet direct dependencies (GPIOLIB && OF &&
HAS_IOMEM)
warning: (FAULT_INJECTION_STACKTRACE_FILTER && LATENCYTOP && LOCKDEP)
selects FRAME_POINTER which has unmet direct dependencies
(DEBUG_KERNEL && (CRIS || M68K || FRV || UML || SUPERH || BLACKFIN ||
MN10300 || METAG) || ARCH_WANT_FRAME_POINTERS)
will be turned into:
$ make ARCH=score allyesconfig
scripts/kconfig/conf --allyesconfig Kconfig
WARNING: unmet direct dependencies detected for MFD_SYSCON
Depends on [n]: HAS_IOMEM [=n]
Selected by [y]:
- PINCTRL_STM32 [=y] && PINCTRL [=y] && (ARCH_STM32 ||
COMPILE_TEST [=y]) && OF [=y]
- RTC_DRV_AT91SAM9 [=y] && RTC_CLASS [=y] && (ARCH_AT91 ||
COMPILE_TEST [=y])
- RESET_IMX7 [=y] && RESET_CONTROLLER [=y]
- PHY_HI6220_USB [=y] && (ARCH_HISI && ARM64 ||
COMPILE_TEST [=y])
- PHY_RALINK_USB [=y] && (RALINK || COMPILE_TEST [=y])
- PHY_ROCKCHIP_PCIE [=y] && (ARCH_ROCKCHIP && OF [=y] ||
COMPILE_TEST [=y])
WARNING: unmet direct dependencies detected for OF_GPIO
Depends on [n]: GPIOLIB [=y] && OF [=y] && HAS_IOMEM [=n]
Selected by [y]:
- PINCTRL_MTK [=y] && PINCTRL [=y] && (ARCH_MEDIATEK ||
COMPILE_TEST [=y]) && OF [=y]
- PINCTRL_MT7622 [=y] && PINCTRL [=y] && (ARCH_MEDIATEK ||
COMPILE_TEST [=y]) && OF [=y] && (ARM64 || COMPILE_TEST [=y])
WARNING: unmet direct dependencies detected for FRAME_POINTER
Depends on [n]: DEBUG_KERNEL [=y] && (CRIS || M68K || FRV || UML ||
SUPERH || BLACKFIN || MN10300 || METAG) || ARCH_WANT_FRAME_POINTERS [=n]
Selected by [y]:
- LATENCYTOP [=y] && DEBUG_KERNEL [=y] && STACKTRACE_SUPPORT [=y] &&
PROC_FS [=y] && !MIPS && !PPC && !S390 && !MICROBLAZE && !ARM_UNWIND &&
!ARC && !X86
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Petr Vorel <petr.vorel@gmail.com>
Commit 246cf9c26b ("kbuild: Warn on selecting symbols with unmet
direct dependencies") forcibly promoted ->dir_dep.tri to yes from mod.
So, the unmet direct dependencies of tristate symbols are not reported.
[Test Case]
config MODULES
def_bool y
option modules
config A
def_bool y
select B
config B
tristate "B"
depends on m
This causes unmet dependency because 'B' is forced 'y' ignoring
'depends on m'. This should be warned.
On the other hand, the following case ('B' is bool) should not be
warned, so 'depends on m' for bool symbols should be naturally treated
as 'depends on y'.
[Test Case2 (not unmet dependency)]
config MODULES
def_bool y
option modules
config A
def_bool y
select B
config B
bool "B"
depends on m
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
If recursive inclusion is detected, it should fail with error
messages. Test this.
This also tests the line numbers in the error message, fixed by
commit 5ae6fcc4bb ("kconfig: fix line number in recursive inclusion
error message").
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
Recursive dependency should be detected and warned. Test this.
This indirectly tests the line number increments.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
Commit 3b9a19e089 ("kconfig: loop as long as we changed some symbols
in randconfig") fixed randconfig where a choice contains a sub-choice.
Prior to that commit, the sub-choice values were not set.
I am not sure whether this is an intended feature or just something
people discovered works, but it is used in the real world;
drivers/usb/gadget/legacy/Kconfig is source'd in a choice context,
then creates a sub-choice in it.
For the test case in this commit, there are 3 possible results.
Case 1:
CONFIG_A=y
# CONFIG_B is not set
Case 2:
# CONFIG_A is not set
CONFIG_B=y
CONFIG_C=y
# CONFIG_D is not set
Case 3:
# CONFIG_A is not set
CONFIG_B=y
# CONFIG_C is not set
CONFIG_D=y
CONFIG_E=y
So, this test iterates several times, and checks if the result is
either of the three.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
Commit fbe98bb9ed ("kconfig: Fix defconfig when one choice menu
selects options that another choice menu depends on") fixed defconfig
when two choices interact (i.e. calculating the visibility of a choice
requires to calculate another choice).
The test code in that commit log was based on the real world example,
and complicated. So, I shrunk it down to the following:
defconfig.choice:
---8<---
CONFIG_CHOICE_VAL0=y
---8<---
---8<---
config MODULES
def_bool y
option modules
choice
prompt "Choice"
config CHOICE_VAL0
tristate "Choice 0"
config CHOICE_VAL1
tristate "Choice 1"
endchoice
choice
prompt "Another choice"
depends on CHOICE_VAL0
config DUMMY
bool "dummy"
endchoice
---8<---
Prior to commit fbe98bb9ed,
$ scripts/kconfig/conf --defconfig=defconfig.choice Kconfig.choice
resulted in:
CONFIG_MODULES=y
CONFIG_CHOICE_VAL0=m
# CONFIG_CHOICE_VAL1 is not set
CONFIG_DUMMY=y
where the expected result would be:
CONFIG_MODULES=y
CONFIG_CHOICE_VAL0=y
# CONFIG_CHOICE_VAL1 is not set
CONFIG_DUMMY=y
Roughly, this weird behavior happened like this:
Symbols are calculated a couple of times. First, all symbols are
calculated in conf_read(). The first 'choice' is evaluated to 'y'
due to the SYMBOL_DEF_USER flag, but sym_calc_choice() clears it
unless all of its choice values are explicitly set by the user.
conf_set_all_new_symbols() clears all SYMBOL_VALID flags. Then, only
choices are calculated. Here, the SYMBOL_DEF_USER for the first choice
has been forgotten, so it is evaluated to 'm'. set_all_choice_values()
sets SYMBOL_DEF_USER again to choice symbols.
When calculating the second choice, due to 'depends on CHOICE_VAL0',
it triggers the calculation of CHOICE_VAL0. As a result, SYMBOL_VALID
is set for CHOICE_VAL0.
Symbols except choices get the final chance of re-calculation in
conf_write(). In a normal case, CHOICE_VAL0 would be re-calculated,
then the first choice would be indirectly re-calculated with the
SYMBOL_DEF_USER which has been recalled by set_all_choice_values(),
which would be evaluated to 'y'. But, in this case, CHOICE_VAL0 has
already been marked as SYMBOL_VALID, so this re-calculation does not
happen. Then, =m from the conf_set_all_new_symbols() phase is written
out to the .config file.
Add a unit test for this naive case.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
If tristate choice values depend on symbols set to 'm', they should be
hidden when the choice containing them is changed from 'm' to 'y'
(i.e. exclusive choice).
This issue was fixed by commit fa64e5f6a3 ("kconfig/symbol.c: handle
choice_values that depend on 'm' symbols").
Add a test case to avoid regression.
For the input in this unit test, there is a room for argument if
"# CONFIG_CHOICE1 is not set" should be written to the .config file.
After commit fa64e5f6a3, this line was written to the .config file.
With commit cb67ab2cd2 ("kconfig: do not write choice values when
their dependency becomes n"), it is not written now.
In this test, "# CONFIG_CHOICE1 is not set" is don't care.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
Commit cb67ab2cd2 ("kconfig: do not write choice values when their
dependency becomes n") fixed a problem where "# CONFIG_... is not set"
for choice values are wrongly written into the .config file when they
are once visible, then become invisible later.
Add a test for this naive case.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
If new choice values are added with new dependency, and they become
visible during user configuration, oldconfig should recognize them
as (NEW), and ask the user for choice.
This issue was fixed by commit 5d09598d48 ("kconfig: fix new choices
being skipped upon config update").
This is a subtle corner case. Add a test case to avoid breakage.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
If a symbols has dependency on the preceding symbol, the menu entry
should become the submenu of the preceding one, and displayed with
deeper indentation.
This is done by restructuring the menu tree in menu_finalize().
It is a bit complicated computation, so let's add a test case.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
The calculation of 'choice' is a bit complicated part in Kconfig.
The behavior of 'y' choice is intuitive. If choice values are tristate,
the choice can be 'm' where each value can be enabled independently.
Also, if a choice is marked as 'optional', the whole choice can be
invisible.
Test basic functionality of choice.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
Many parts in Kconfig are so cryptic and need refactoring. However,
its complexity prevents us from moving forward. There are several
naive corner cases where it is difficult to notice breakage. If
those are covered by unit tests, we will be able to touch the code
with more confidence.
Here is a simple test framework based on pytest. The conftest.py
provides a fixture useful to run commands such as 'oldaskconfig' etc.
and to compare the resulted .config, stdout, stderr with expectations.
How to add test cases?
----------------------
For each test case, you should create a subdirectory under
scripts/kconfig/tests/ (so test cases are separated from each other).
Every test case directory should contain the following files:
- __init__.py: describes test functions
- Kconfig: the top level Kconfig file for the test
To do a useful job, test cases generally need additional data like
input .config and information about expected results.
How to run tests?
-----------------
You need python3 and pytest. Then, run "make testconfig". O= option
is supported. If V=1 is given, detailed logs captured during tests
are displayed.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
The local{yes,mod}config targets currently have streamline_config.pl as
a prerequisite. This is redundant, because streamline_config.pl is a
checked-in file with no prerequisites.
Remove the prerequisite and reference streamline_config.pl directly in
the recipe of the rule instead.
Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
As commit cedd55d49d ("kconfig: Remove silentoldconfig from help
and docs; fix kconfig/conf's help") mentioned, 'silentoldconfig' is a
historical misnomer. That commit removed it from help and docs since
it is an internal interface. If so, it should be allowed to rename
it to something more intuitive. 'syncconfig' is the one I came up
with because it updates the .config if necessary, then synchronize
include/generated/autoconf.h and include/config/* with it.
You should not manually invoke 'silentoldcofig'. Display warning if
used in case existing scripts are doing wrong.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
The purpose of local{yes,mod}config is to arrange the .config file
based on actually loaded modules. It is unnecessary to update
include/generated/autoconf.h and include/config/* stuff here.
They will be updated as needed during the build.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
Historically, "make oldconfig" has changed its behavior several times,
quieter or louder. (I attached the history below.) Currently, it is
not as quiet as it should be. This commit addresses it.
Test Case
---------
---------------------------(Kconfig)----------------------------
menu "menu"
config FOO
bool "foo"
menu "sub menu"
config BAR
bool "bar"
endmenu
endmenu
menu "sibling menu"
config BAZ
bool "baz"
endmenu
----------------------------------------------------------------
---------------------------(.config)----------------------------
CONFIG_BAR=y
CONFIG_BAZ=y
----------------------------------------------------------------
With the Kconfig and .config above, "make silentoldconfig" and
"make oldconfig" work differently, like follows:
$ make silentoldconfig
scripts/kconfig/conf --silentoldconfig Kconfig
*
* Restart config...
*
*
* menu
*
foo (FOO) [N/y/?] (NEW) y
#
# configuration written to .config
#
$ make oldconfig
scripts/kconfig/conf --oldconfig Kconfig
*
* Restart config...
*
*
* menu
*
foo (FOO) [N/y/?] (NEW) y
*
* sub menu
*
bar (BAR) [Y/n/?] y
#
# configuration written to .config
#
Both hide "sibling node" since it is irrelevant. The difference is
that silentoldconfig hides "sub menu" whereas oldconfig does not.
The behavior of silentoldconfig is preferred since the "sub menu"
does not contain any new symbol.
The root cause is in conf(). There are three input modes that can
call conf(); oldaskconfig, oldconfig, and silentoldconfig.
Everytime conf() encounters a menu entry, it calls check_conf() to
check if it contains new symbols. If no new symbol is found, the
menu is just skipped.
Currently, this happens only when input_mode == silentoldconfig.
The oldaskconfig enters into the check_conf() loop as silentoldconfig,
so oldaskconfig works likewise for the second loop or later, but it
never happens for oldconfig. So, irrelevant sub-menus are shown for
oldconfig.
Change the test condition to "input_mode != oldaskconfig". This is
false only for the first loop of oldaskconfig; it must ask the user
all symbols, so no need to call check_conf().
History of oldconfig
--------------------
[0] Originally, "make oldconfig" was as loud as "make config" (It
showed the entire .config file)
[1] Commit cd9140e1e7 ("kconfig: make oldconfig is now less chatty")
made oldconfig quieter, but it was still less quieter than
silentoldconfig. (oldconfig did not hide sub-menus)
[2] Commit 204c96f609 ("kconfig: fix silentoldconfig") changed
the input_mode of oldconfig to "ask_silent" from "ask_new".
So, oldconfig really became as quiet as silentoldconfig.
(oldconfig hided irrelevant sub-menus)
[3] Commit 4062f1a4c0 ("kconfig: use long options in conf") made
oldconfig as loud as [0] due to misconversion.
[4] Commit 1482834971 ("kconfig: fix make oldconfig") addressed
the misconversion of [3], but it made oldconfig quieter only to
the same level as [1], not [2].
This commit is restoring the behavior of [2].
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
check_conf() never increments conf_cnt for listnewconfig, so conf_cnt
is always zero.
In other words, conf_cnt is not zero, "input_mode != listnewconfig"
is met.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
conf() is never called for listnewconfig / olddefconfig.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
check_conf() traverses the menu tree, but it is completely no-op for
olddefconfig because the following if-else block does nothing.
if (input_mode == listnewconfig) {
...
} else if (input_mode != olddefconfig) {
...
}
As the help message says, olddefconfig automatically sets new symbols
to their default value. There is no room for manual intervention.
So, calling check_conf() for olddefconfig is odd in the first place.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
=== Background ===
- Visible n-valued bool/tristate symbols generate a
'# CONFIG_FOO is not set' line in the .config file. The idea is to
remember the user selection without having to set a Makefile
variable. Having n correspond to the variable being undefined in the
Makefiles makes for easy CONFIG_* tests.
- Invisible n-valued bool/tristate symbols normally do not generate a
'# CONFIG_FOO is not set' line, because user values from .config
files have no effect on invisible symbols anyway.
Currently, there is one exception to this rule: Any bool/tristate symbol
that gets the value n through a 'default' property generates a
'# CONFIG_FOO is not set' line, even if the symbol is invisible.
Note that this only applies to explicitly given defaults, and not when
the symbol implicitly defaults to n (like bool/tristate symbols without
'default' properties do).
This is inconsistent, and seems redundant:
- As mentioned, the '# CONFIG_FOO is not set' won't affect the symbol
once the .config is read back in.
- Even if the symbol is invisible at first but becomes visible later,
there shouldn't be any harm in recalculating the default value
rather than viewing the '# CONFIG_FOO is not set' as a previous
user value of n.
=== Changes ===
Change sym_calc_value() to only set SYMBOL_WRITE (write to .config) for
non-n-valued 'default' properties.
Note that SYMBOL_WRITE is always set for visible symbols regardless of whether
they have 'default' properties or not, so this change only affects invisible
symbols.
This reduces the size of the x86 .config on my system by about 1% (due
to removed '# CONFIG_FOO is not set' entries).
One side effect of (and the main motivation for) this change is making
the following two definitions behave exactly the same:
config FOO
bool
config FOO
bool
default n
With this change, neither of these will generate a
'# CONFIG_FOO is not set' line (assuming FOO isn't selected/implied).
That might make it clearer to people that a bare 'default n' is
redundant.
This change only affects generated .config files and not autoconf.h:
autoconf.h only includes #defines for non-n bool/tristate symbols.
=== Testing ===
The following testing was done with the x86 Kconfigs:
- .config files generated before and after the change were compared to
verify that the only difference is some '# CONFIG_FOO is not set'
entries disappearing. A couple of these were inspected manually, and
most turned out to be from redundant 'default n/def_bool n'
properties.
- The generated include/generated/autoconf.h was compared before and
after the change and verified to be identical.
- As a sanity check, the same modification was done to Kconfiglib.
The Kconfiglib test suite was then run to check for any mismatches
against the output of the C implementation.
Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Surprisingly or not, disabling a CONFIG option (which is assumed to
be unneeded) may be not so trivial. Especially it is not trivial, when
this CONFIG option is selected by a dozen of other configs. Before the
moment commit 1ccb271433 ("kconfig: make "Selected by:" and
"Implied by:" readable") popped up in v4.16-rc1, it was an absolute pain
to break down the "Selected by" reverse dependency expression in order
to identify all those configs which select (IOW *do not allow
disabling*) a certain feature (assumed to be not needed).
This patch tries to make one step further by putting at users'
fingertips the revdep top level OR sub-expressions grouped/clustered by
the tristate value they evaluate to. This should allow the users to
directly concentrate on and tackle the _active_ reverse dependencies.
To give some numbers and quantify the complexity of certain reverse
dependencies, assuming commit 617aebe6a9 ("Merge tag
'usercopy-v4.16-rc1' of
git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux"), ARCH=arm64
and vanilla arm64 defconfig, here is the top 10 CONFIG options with
the highest amount of top level "||" sub-expressions/tokens that make
up the final "Selected by" reverse dependency expression.
| Config | All revdep | Active revdep |
|-------------------|------------|---------------|
| REGMAP_I2C | 212 | 9 |
| CRC32 | 167 | 25 |
| FW_LOADER | 128 | 5 |
| MFD_CORE | 124 | 9 |
| FB_CFB_IMAGEBLIT | 114 | 2 |
| FB_CFB_COPYAREA | 111 | 2 |
| FB_CFB_FILLRECT | 110 | 2 |
| SND_PCM | 103 | 2 |
| CRYPTO_HASH | 87 | 19 |
| WATCHDOG_CORE | 86 | 6 |
The story behind the above is that users need to visually
review/evaluate 212 expressions which *potentially* select REGMAP_I2C
in order to identify the expressions which *actually* select REGMAP_I2C,
for a particular ARCH and for a particular defconfig used.
To make this experience smoother, change the way reverse dependencies
are displayed to the user from [1] to [2].
[1] Old representation of DMA_ENGINE_RAID:
Selected by:
- AMCC_PPC440SPE_ADMA [=n] && DMADEVICES [=y] && (440SPe || 440SP)
- BCM_SBA_RAID [=m] && DMADEVICES [=y] && (ARM64 [=y] || ...
- FSL_RAID [=n] && DMADEVICES [=y] && FSL_SOC && ...
- INTEL_IOATDMA [=n] && DMADEVICES [=y] && PCI [=y] && X86_64
- MV_XOR [=n] && DMADEVICES [=y] && (PLAT_ORION || ARCH_MVEBU [=y] ...
- MV_XOR_V2 [=y] && DMADEVICES [=y] && ARM64 [=y]
- XGENE_DMA [=n] && DMADEVICES [=y] && (ARCH_XGENE [=y] || ...
- DMATEST [=n] && DMADEVICES [=y] && DMA_ENGINE [=y]
[2] New representation of DMA_ENGINE_RAID:
Selected by [y]:
- MV_XOR_V2 [=y] && DMADEVICES [=y] && ARM64 [=y]
Selected by [m]:
- BCM_SBA_RAID [=m] && DMADEVICES [=y] && (ARM64 [=y] || ...
Selected by [n]:
- AMCC_PPC440SPE_ADMA [=n] && DMADEVICES [=y] && (440SPe || ...
- FSL_RAID [=n] && DMADEVICES [=y] && FSL_SOC && ...
- INTEL_IOATDMA [=n] && DMADEVICES [=y] && PCI [=y] && X86_64
- MV_XOR [=n] && DMADEVICES [=y] && (PLAT_ORION || ARCH_MVEBU [=y] ...
- XGENE_DMA [=n] && DMADEVICES [=y] && (ARCH_XGENE [=y] || ...
- DMATEST [=n] && DMADEVICES [=y] && DMA_ENGINE [=y]
Suggested-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Eugeniu Rosca <erosca@de.adit-jv.com>
Reviewed-by: Petr Vorel <pvorel@suse.cz>
Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
This commit splits out the special E_OR handling ('-' instead of '||')
into a dedicated helper expr_print_revdev().
Restore the original expr_print() prior to commit 1ccb271433
("kconfig: make "Selected by:" and "Implied by:" readable").
This makes sense because:
- We need to chop those expressions only when printing the reverse
dependency, and only when E_OR is encountered
- Otherwise, it should be printed as before, so fall back to
expr_print()
This also improves the behavior; for a single line, it was previously
displayed in the same line as "Selected by", like this:
Selected by: A [=n] && B [=n]
This will be displayed in a new line, consistently:
Selected by:
- A [=n] && B [=n]
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Petr Vorel <pvorel@suse.cz>
Commit d3fc425e81 ("kbuild: make sure autoksyms.h exists early")
moved the code that touches autoksyms.h to scripts/kconfig/Makefile
with obscure reason.
From Nicolas' comment [1], he did not seem to be sure about the root
cause.
I guess I figured it out, so here is a fix-up I think is more correct.
According to the error log in the original post [2], the build failed
in scripts/mod/devicetable-offsets.c
scripts/mod/Makefile is descended from scripts/Makefile, which is
invoked from the top-level Makefile by the 'scripts' target.
To build vmlinux and/or modules, Kbuild descend into $(vmlinux-dirs).
This depends on 'prepare' and 'scripts' as follows:
$(vmlinux-dirs): prepare scripts
Because there is no dependency between 'prepare' and 'scripts', the
parallel building can execute them simultaneously.
'prepare' depends on 'prepare1', which touched autoksyms.h, while
'scripts' descends into script/, then scripts/mod/, which needs
<generated/autoksyms.h> if CONFIG_TRIM_UNUSED_KSYMS. It was the
reason of the race.
I am not happy to have unrelated code in the Kconfig Makefile, so
getting it back to the top Makefile.
I removed the standalone test target because I want to use it to
create an empty autoksyms.h file. Here is a little improvement;
unnecessary autoksyms.h is not created when CONFIG_TRIM_UNUSED_KSYMS
is disabled.
[1] https://lkml.org/lkml/2016/11/30/734
[2] https://lkml.org/lkml/2016/11/30/531
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
When recursive inclusion is detected, the line number of the last
'included from:' is wrong.
[Test Case]
Kconfig:
-------->8--------
source "Kconfig2"
-------->8--------
Kconfig2:
-------->8--------
source "Kconfig3"
-------->8--------
Kconfig3:
-------->8--------
source "Kconfig"
-------->8--------
[Result]
$ make allyesconfig
scripts/kconfig/conf --allyesconfig Kconfig
Kconfig:1: recursive inclusion detected. Inclusion path:
current file : 'Kconfig'
included from: 'Kconfig3:1'
included from: 'Kconfig2:1'
included from: 'Kconfig:3'
scripts/kconfig/Makefile:89: recipe for target 'allyesconfig' failed
make[1]: *** [allyesconfig] Error 1
Makefile:512: recipe for target 'allyesconfig' failed
make: *** [allyesconfig] Error 2
where we expect
current file : 'Kconfig'
included from: 'Kconfig3:1'
included from: 'Kconfig2:1'
included from: 'Kconfig:1'
The 'iter->lineno+1' in the second fpinrtf() should be 'iter->lineno-1'.
I refactored the code to merge the two fprintf() calls.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
The package name is ncurses-devel for Redhat based distros
and libncurses-dev for Debian based distros.
Signed-off-by: Arvind Prasanna <arvindprasanna@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
The named choice is not used in the kernel tree, but if it were used,
it would not be freed.
The intention of the named choice can be seen in the log of
commit 5a1aa8a1af ("kconfig: add named choice group").
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
The 'defconfig_list' is a weird attribute. If the '.config' is
missing, conf_read_simple() iterates over all visible defaults,
then it uses the first one for which fopen() succeeds.
config DEFCONFIG_LIST
string
depends on !UML
option defconfig_list
default "/lib/modules/$UNAME_RELEASE/.config"
default "/etc/kernel-config"
default "/boot/config-$UNAME_RELEASE"
default "$ARCH_DEFCONFIG"
default "arch/$ARCH/defconfig"
However, like other symbols, the first visible default is always
written out to the .config file. This might be different from what
has been actually used.
For example, on my machine, the third one "/boot/config-$UNAME_RELEASE"
is opened, like follows:
$ rm .config
$ make oldconfig 2>/dev/null
scripts/kconfig/conf --oldconfig Kconfig
#
# using defaults found in /boot/config-4.4.0-112-generic
#
*
* Restart config...
*
*
* IRQ subsystem
*
Expose irq internals in debugfs (GENERIC_IRQ_DEBUGFS) [N/y/?] (NEW)
However, the resulted .config file contains the first one since it is
visible:
$ grep CONFIG_DEFCONFIG_LIST .config
CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"
In order to stop confusing people, prevent this CONFIG option from
being written to the .config file.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
We already have xmalloc(), xcalloc(), and xrealloc((). Add xstrdup()
as well to save tedious error handling.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
This function returns realloc'ed memory, so the returned pointer
must be passed to free() when done. So, 'const' qualifier is odd.
It is allowed to modify the expanded string.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
We already have xmalloc(), xcalloc(). Add xrealloc() as well
to save tedious error handling.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
These messages should be directed to stderr.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
If stdio is not tty, conf_askvalue() puts additional new line to
prevent prompts from being concatenated into a single line. This
care is missing in conf_choice(), so a 'choice' prompt and the next
prompt are shown in the same line.
Move the code into xfgets() to cater to all cases. To improve this
more, let's echo stdin to stdout. This clarifies what keys were
input from stdio and the stdout looks like as if it were from tty.
I removed the isatty(2) check since stderr is unrelated here.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
Except silentoldconfig, valid_stdin is 1, so check_stdin() is no-op.
oldconfig and silentoldconfig work almost in the same way except that
the latter generates additional files under include/. Both ask users
for input for new symbols.
I do not know why only silentoldconfig requires stdio be tty.
$ rm -f .config; touch .config
$ yes "" | make oldconfig > stdout
$ rm -f .config; touch .config
$ yes "" | make silentoldconfig > stdout
make[1]: *** [silentoldconfig] Error 1
make: *** [silentoldconfig] Error 2
$ tail -n 4 stdout
Console input/output is redirected. Run 'make oldconfig' to update configuration.
scripts/kconfig/Makefile:40: recipe for target 'silentoldconfig' failed
Makefile:507: recipe for target 'silentoldconfig' failed
Redirection is useful, for example, for testing where we want to give
particular key inputs from a test file, then check the result.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
I could not figure out why this pattern should be ignored.
Checking commit 1e65174a33 ("Add some basic .gitignore files")
did not help.
Let's remove this pattern, then see if it is really needed.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
'make config', 'make oldconfig', etc. always receive '?' as a valid
input and show useful information even if no help text is available.
------------------------>8------------------------
foo (FOO) [N/y] (NEW) ?
There is no help available for this option.
Symbol: FOO [=n]
Type : bool
Prompt: foo
Defined at Kconfig:1
------------------------>8------------------------
However, '?' is not shown in the prompt if its help text is missing.
Let's show '?' all the time so that the prompt and the behavior match.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
"# CONFIG_... is not set" for choice values are wrongly written into
the .config file if they are once visible, then become invisible later.
Test case
---------
---------------------------(Kconfig)----------------------------
config A
bool "A"
choice
prompt "Choice ?"
depends on A
config CHOICE_B
bool "Choice B"
config CHOICE_C
bool "Choice C"
endchoice
----------------------------------------------------------------
---------------------------(.config)----------------------------
CONFIG_A=y
----------------------------------------------------------------
With the Kconfig and .config above,
$ make config
scripts/kconfig/conf --oldaskconfig Kconfig
*
* Linux Kernel Configuration
*
A (A) [Y/n] n
#
# configuration written to .config
#
$ cat .config
#
# Automatically generated file; DO NOT EDIT.
# Linux Kernel Configuration
#
# CONFIG_A is not set
# CONFIG_CHOICE_B is not set
# CONFIG_CHOICE_C is not set
Here,
# CONFIG_CHOICE_B is not set
# CONFIG_CHOICE_C is not set
should not be written into the .config file because their dependency
"depends on A" is unmet.
Currently, there is no code that clears SYMBOL_WRITE of choice values.
Clear SYMBOL_WRITE for all symbols in sym_calc_value(), then set it
again after calculating visibility. To simplify the logic, set the
flag if they have non-n visibility, regardless of types, and regardless
of whether they are choice values or not.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
Blank help texts are probably either a typo, a Kconfig misunderstanding,
or some kind of half-committing to adding a help text (in which case a
TODO comment would be clearer, if the help text really can't be added
right away).
Best to flag them, IMO.
Example warning:
drivers/mmc/host/Kconfig:877: warning: 'MMC_TOSHIBA_PCI' defined with blank help text
Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
A pretty big batch of Kconfig updates. I have to mention the lexer
and parser of Kconfig are now built from real .l and .y sources.
So, flex and bison are the requirement for building the kernel.
Both of them (unlike gperf) have been stable for a long time. This
change has been tested several weeks in linux-next, and I did not
receive any problem report about this.
Summary:
- Add checks for mistakes, like the choice default is not in
choice, help is doubled
- Document data structure and complex code
- Fix various memory leaks
- Change Makefile to build lexer and parser instead of using
pre-generated C files
- Drop 'boolean' keyword, which is equivalent to 'bool'
- Use default 'yy' prefix and remove unneeded Make variables
- Fix gettext() check for xconfig
- Announce that oldnoconfig will be finally removed
- Make 'Selected by:' and 'Implied by' readable in help and
search result
- Hide silentoldconfig from 'make help' to stop confusing people
- Fix misc things and cleanups
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Merge tag 'kconfig-v4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kconfig updates from Masahiro Yamada:
"A pretty big batch of Kconfig updates.
I have to mention the lexer and parser of Kconfig are now built from
real .l and .y sources. So, flex and bison are the requirement for
building the kernel. Both of them (unlike gperf) have been stable for
a long time. This change has been tested several weeks in linux-next,
and I did not receive any problem report about this.
Summary:
- add checks for mistakes, like the choice default is not in choice,
help is doubled
- document data structure and complex code
- fix various memory leaks
- change Makefile to build lexer and parser instead of using
pre-generated C files
- drop 'boolean' keyword, which is equivalent to 'bool'
- use default 'yy' prefix and remove unneeded Make variables
- fix gettext() check for xconfig
- announce that oldnoconfig will be finally removed
- make 'Selected by:' and 'Implied by' readable in help and search
result
- hide silentoldconfig from 'make help' to stop confusing people
- fix misc things and cleanups"
* tag 'kconfig-v4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (37 commits)
kconfig: Remove silentoldconfig from help and docs; fix kconfig/conf's help
kconfig: make "Selected by:" and "Implied by:" readable
kconfig: announce removal of oldnoconfig if used
kconfig: fix make xconfig when gettext is missing
kconfig: Clarify menu and 'if' dependency propagation
kconfig: Document 'if' flattening logic
kconfig: Clarify choice dependency propagation
kconfig: Document SYMBOL_OPTIONAL logic
kbuild: remove unnecessary LEX_PREFIX and YACC_PREFIX
kconfig: use default 'yy' prefix for lexer and parser
kconfig: make conf_unsaved a local variable of conf_read()
kconfig: make xfgets() really static
kconfig: make input_mode static
kconfig: Warn if there is more than one help text
kconfig: drop 'boolean' keyword
kconfig: use bool instead of boolean for type definition attributes, again
kconfig: Remove menu_end_entry()
kconfig: Document important expression functions
kconfig: Document automatic submenu creation code
kconfig: Fix choice symbol expression leak
...
As explained by Michal Marek at https://lkml.org/lkml/2011/8/31/189
silentoldconfig has become a misnomer. It has become an internal interface
so remove it from "make help" and Documentation/ to stop confusing people
using it as seen for instance at
https://chromium-review.googlesource.com/835632 Don't remove it from
kconfig/Makefile yet not to break any (other) tool using it.
On the other hand, correct and expand its description in the help of
the (internal) scripts/kconfig/conf.c
Signed-off-by: Marc Herbert <marc.herbert@intel.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reverse dependency expressions can get rather unwieldy, especially if
a symbol is selected by more than a handful of other symbols. I.e. it's
possible to have near endless expressions like:
A && B && !C || D || F && (G || H) || [...]
Chop these expressions into actually readable chunks:
- A && B && !C
- D
- F && (G || H)
- [...]
I.e. transform the top level OR tokens into newlines and prepend each
line with a minus. This makes the "Selected by:" and "Implied by:" blurb
much easier to read. This is done only if there is more than one top
level OR. "Depends on:" and "Range :" were deliberately left as they are.
Based on idea from Paul Bolle.
Suggested-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Petr Vorel <petr.vorel@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
The 'oldnoconfig' is really confusing due to its counter-intuitive name.
It was renamed by commit fb16d8912d ("kconfig: replace 'oldnoconfig'
with 'olddefconfig', and keep the old name as an alias").
The 'oldnoconfig' has been kept as an alias for enough period of time,
and finally I am planning to remove it. I will give people a little
more time for migration. Meanwhile, the following message will be
displayed if oldnoconfig is used.
WARNING: "oldnoconfig" target will be removed after Linux 4.19
Please use "olddefconfig" instead, which is an alias.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
The C-based config programs are properly guarded from a missing (or,
currently, external) libintl.h by the HOST_EXTRACFLAGS check, but
this does not help the C++-based qconf.
Signed-off-by: Yaakov Selkowitz <yselkowi@redhat.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
It is not obvious that the last two cases refer to menus and ifs,
respectively, in the conditional that sets 'parentdep'.
Automatic submenu creation is done later, so the parent can't be a
symbol here.
No functional changes. Only comments added.
Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
It is not obvious that this might refer to an 'if', making the code
pretty cryptic:
if (menu->list && (!menu->prompt || !menu->prompt->text)) {
Kconfig keeps the 'if' menu nodes even after flattening. Reflect that in
the example to be accurate.
No functional changes. Only comments added.
Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
It's easy to miss that choices are special-cased to pass on their mode
as the parent dependency.
No functional changes. Only comments added.
Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Not obvious, especially if you don't already know how choices are
implemented.
No functional changes. Only comments added.
Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Flex and Bison provide an option to change the prefix of globally-
visible symbols. This is useful to link multiple lexers and/or
parsers into the same executable. However, Kconfig (and any other
host programs in kernel) uses a single lexer and parser. I do not
see a good reason to change the default 'yy' prefix.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
conf_unsaved is initialized by conf_read_simple(), but it is possible
to move it to conf_read() so that it can be a local variable.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Sparse reports:
warning: symbol 'xfgets' was not declared. Should it be static?
It is declared as static, but it is missing in the definition part.
Move the definition up and remove the forward declaration.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Avoids mistakes like in the following real-world example, where only the
final help string ("Say Y...") was used. This particular example was
fixed in commit 561b29e4ec ("media: fix media Kconfig help syntax
issues").
config DVB_NETUP_UNIDVB
...
select DVB_CXD2841ER if MEDIA_SUBDRV_AUTOSELECT
---help---
Support for NetUP PCI express Universal DVB card.
help
Say Y when you want to support NetUP Dual Universal DVB card
...
This now prints the following warning:
drivers/media/pci/netup_unidvb:13: warning: 'DVB_NETUP_UNIDVB' defined with more than one help text -- only the last one will be used
Also free() any extra help strings.
Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
No more users of this keyword. Drop it according to the notice by
commit 6341e62b21 ("kconfig: use bool instead of boolean for type
definition attributes").
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Luis R. Rodriguez <mcgrof@kernel.org>
menu_end_entry() is empty and completely unused as far as I can tell:
$ git log -G menu_end_entry --oneline
a02f057 [PATCH] kconfig: improve error handling in the parser
1da177e Linux-2.6.12-rc2
Last one is the initial Git commit, where menu_end_entry() is empty as
well. I couldn't find anything that redefined it on Google either.
It might be a debugging helper for setting a breakpoint after each
config, menuconfig, and comment is parsed. IMO it hurts more than it
helps in that case by making the parsing code look more complicated at a
glance than it really is, and I suspect it doesn't get used much.
Tested by running the Kconfiglib test suite, which indirectly verifies
that the .config files generated by the C implementation for each
defconfig file in the kernel stays the same.
Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Many of these functions are quite the head scratchers if you don't know
what they're trying to do. Document them.
Also make it clear which functions rewrite expressions in-place and
which return new expressions. This prevents memory errors.
No functional changes. Only comments added.
Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
It's tricky to figure out what it does (and how) without staring at the
code for a long time. Document it to make it more transparent.
No functional changes. Only comments added.
Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
When propagating dependencies from parents after parsing, an expression
node is allocated if the parent symbol is a 'choice'. This node was
never freed.
Outline of leak:
if (sym && sym_is_choice(sym)) {
...
*Allocate (in this case only)*
parentdep = expr_alloc_symbol(sym);
} else if (parent->prompt)
parentdep = parent->prompt->visible.expr;
else
parentdep = parent->dep;
for (menu = parent->list; menu; menu = menu->next) {
...
*Copy*
basedep = expr_alloc_and(expr_copy(parentdep), basedep);
...
}
*parentdep lost if the parent is a choice!*
Fix by freeing 'parentdep' after the loop if the parent symbol is a
choice. Note that this only frees the expression node and not the choice
symbol itself.
Summary from Valgrind on 'menuconfig' (ARCH=x86) before the fix:
LEAK SUMMARY:
definitely lost: 1,608 bytes in 67 blocks
...
Summary after the fix:
LEAK SUMMARY:
definitely lost: 0 bytes in 0 blocks
...
Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Only the E_NOT operand and not the E_NOT node itself was freed, due to
accidentally returning too early in expr_free(). Outline of leak:
switch (e->type) {
...
case E_NOT:
expr_free(e->left.expr);
return;
...
}
*Never reached, 'e' leaked*
free(e);
Fix by changing the 'return' to a 'break'.
Summary from Valgrind on 'menuconfig' (ARCH=x86) before the fix:
LEAK SUMMARY:
definitely lost: 44,448 bytes in 1,852 blocks
...
Summary after the fix:
LEAK SUMMARY:
definitely lost: 1,608 bytes in 67 blocks
...
Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
expr_trans_compare() always allocates and returns a new expression,
giving the following leak outline:
...
*Allocate*
basedep = expr_trans_compare(basedep, E_UNEQUAL, &symbol_no);
...
for (menu = parent->next; menu; menu = menu->next) {
...
*Copy*
dep2 = expr_copy(basedep);
...
*Free copy*
expr_free(dep2);
}
*basedep lost!*
Fix by freeing 'basedep' after the loop.
Summary from Valgrind on 'menuconfig' (ARCH=x86) before the fix:
LEAK SUMMARY:
definitely lost: 344,376 bytes in 14,349 blocks
...
Summary after the fix:
LEAK SUMMARY:
definitely lost: 44,448 bytes in 1,852 blocks
...
Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
If a 'mainmenu' entry appeared in the Kconfig files, two things would
leak:
- The 'struct property' allocated for the default "Linux Kernel
Configuration" prompt.
- The string for the T_WORD/T_WORD_QUOTE prompt after the
T_MAINMENU token, allocated on the heap in zconf.l.
To fix it, introduce a new 'no_mainmenu_stmt' nonterminal that matches
if there's no 'mainmenu' and adds the default prompt. That means the
prompt only gets allocated once regardless of whether there's a
'mainmenu' statement or not, and managing it becomes simple.
Summary from Valgrind on 'menuconfig' (ARCH=x86) before the fix:
LEAK SUMMARY:
definitely lost: 344,568 bytes in 14,352 blocks
...
Summary after the fix:
LEAK SUMMARY:
definitely lost: 344,440 bytes in 14,350 blocks
...
Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
The following strings would leak before this change:
- option env="LEAKED"
- option defconfig_list="LEAKED"
These come in the form of T_WORD tokens and are always allocated on the
heap in zconf.l. Free them.
Summary from Valgrind on 'menuconfig' (ARCH=x86) before the fix:
LEAK SUMMARY:
definitely lost: 344,616 bytes in 14,355 blocks
...
Summary after the fix:
LEAK SUMMARY:
definitely lost: 344,568 bytes in 14,352 blocks
...
Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
The 'source_stmt' nonterminal takes a 'prompt', which consists of either
a T_WORD or a T_WORD_QUOTE, both of which are always allocated on the
heap in zconf.l and need to have their associated strings freed. Free
them.
The existing code already makes sure to always copy the string, but add
a warning to sym_expand_string_value() to make it clear that the string
must be copied, just in case.
Summary from Valgrind on 'menuconfig' (ARCH=x86) before the fix:
LEAK SUMMARY:
definitely lost: 387,504 bytes in 15,545 blocks
...
Summary after the fix:
LEAK SUMMARY:
definitely lost: 344,616 bytes in 14,355 blocks
...
Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Prior to this fix, zconf.y did not free symbol names from zconf.l in
these contexts:
- After T_CONFIG ('config LEAKED')
- After T_MENUCONFIG ('menuconfig LEAKED')
- After T_SELECT ('select LEAKED')
- After T_IMPLY ('imply LEAKED')
- After T_DEFAULT in a choice ('default LEAKED')
All of these come in the form of T_WORD tokens, which always have their
associated string allocated on the heap in zconf.l and need to be freed.
Fix by introducing a new nonterminal 'nonconst_symbol' which takes a
T_WORD, fetches the symbol, and then frees the T_WORD string. The
already existing 'symbol' nonterminal works the same way but also
accepts T_WORD_QUOTE, corresponding to a constant symbol. T_WORD_QUOTE
should not be accepted in any of the contexts above, so the 'symbol'
nonterminal can't be reused here.
Fetching the symbol in 'nonconst_symbol' also removes a bunch of
sym_lookup() calls from actions.
Summary from Valgrind on 'menuconfig' (ARCH=x86) before the fix:
LEAK SUMMARY:
definitely lost: 711,571 bytes in 37,756 blocks
...
Summary after the fix:
LEAK SUMMARY:
definitely lost: 387,504 bytes in 15,545 blocks
...
Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Since commit 31847b67be ("kconfig: allow use of relations other than
(in)equality") it is possible to use relational operators in Kconfig
statements. However, those operators give unexpected results when
applied to bool/tristate values:
(n < y) = y (correct)
(m < y) = y (correct)
(n < m) = n (wrong)
This happens because relational operators process bool and tristate
symbols as strings and m sorts before n. It makes little sense to do a
lexicographical compare on bool and tristate values though.
Documentation/kbuild/kconfig-language.txt states that expression can have
a value of 'n', 'm' or 'y' (or 0, 1, 2 respectively for calculations).
Let's make it so for relational comparisons with bool/tristate
expressions as well and document them. If at least one symbol is an
actual string then the lexicographical compare works just as before.
Signed-off-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
zconf.lex.c is generated by flex, zconf.tab.c by bison. Instead of
running flex and bison during the kernel building, we conventionally
version-control those artifacts with _shipped suffix.
It is tedious to manually regenerate them every time we change the
real sources, zconf.l and zconf.y.
Remove the _shipped files and switch over to build-time generation
of the intermediate C files.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Commit 1c199f2878 ("kbuild: document recursive dependency limitation
/ resolution") probably intended to show a hint along with "recursive
dependency detected!" error, but it missed to add {...} guard, and the
hint is displayed in every loop of the dep_stack traverse, annoyingly.
This error was detected by GCC's -Wmisleading-indentation when switching
to build-time generation of lexer/parser.
scripts/kconfig/symbol.c: In function ‘sym_check_print_recursive’:
scripts/kconfig/symbol.c:1150:3: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
if (stack->sym == last_sym)
^~
scripts/kconfig/symbol.c:1153:4: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘if’
fprintf(stderr, "For a resolution refer to Documentation/kbuild/kconfig-language.txt\n");
^~~~~~~
I could simply add {...} to surround the three fprintf(), but I rather
chose to move the hint after the loop to make the whole message readable.
Fixes: 1c199f2878 ("kbuild: document recursive dependency limitation / resolution"
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Luis R. Rodriguez <mcgrof@kernel.org>
Kconfig currently doesn't handle 'm' appearing in a Kconfig file before
the modules symbol is defined (the symbol with 'option modules'). The
problem is the following code, which runs during parsing:
/* change 'm' into 'm' && MODULES */
if (e->left.sym == &symbol_mod)
return expr_alloc_and(e, expr_alloc_symbol(modules_sym));
If the modules symbol has not yet been defined, modules_sym is NULL,
giving an invalid expression.
Here is a test file where both BEFORE_1 and BEFORE_2 trigger a segfault.
If the modules symbol is removed, all symbols trigger segfaults.
config BEFORE_1
def_tristate y if m
if m
config BEFORE_2
def_tristate y
endif
config MODULES
def_bool y
option modules
config AFTER_1
def_tristate y if m
if m
config AFTER_2
def_tristate y
endif
Fix the issue by rewriting 'm' in menu_finalize() instead. This function
runs after parsing and is the proper place to do it. The following
existing code in conf_parse() in zconf.y ensures that the modules symbol
exists at that point:
if (!modules_sym)
modules_sym = sym_find( "n" );
...
menu_finalize(&rootmenu);
The following tests were done to ensure no functional changes for
configurations that don't reference 'm' before the modules symbol:
- zconfdump(stdout) was run with ARCH=x86 and ARCH=arm before
and after the change and verified to produce identical output.
This function prints all symbols, choices, and menus together
with their properties and their dependency expressions. A
rewritten 'm' appears as 'm && MODULES'.
A small annoyance is that the assert(len != 0) in xfwrite()
needs to be disabled in order to use zconfdump(), because it
chokes on e.g. 'default ""'.
- The Kconfiglib test suite was run to indirectly verify that
alldefconfig, allyesconfig, allnoconfig, and all defconfigs in
the kernel still generate the same final .config.
- Valgrind was used to check for memory errors and (new) memory
leaks.
Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
menu_finalize() is one of the more opaque parts of Kconfig, and I need
to make some changes to it to fix an issue related to modules. Add some
comments related to expression rewriting and dependency propagation as a
review aid. They will also help other people trying to understand the
code.
Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
More directly describes the only thing it does.
Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Looks like a change to a comment in zconf.y was never committed, because
the updated version only appears it zconf.tab.c_shipped. Update the
comment in zconf.y to match.
Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Visibility and choices in particular might be a bit tricky to figure
out.
Also fix existing comment to point out that P_MENU is also used for
menus.
Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Understanding what it represents helps a lot when reading the code, and
it's not obvious, so document it.
The ROOT_MENU flag is only set and tested by the gconf and qconf front
ends, so leave it undocumented here. The obvious guess for what it means
is correct.
Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
This will catch mistakes like in the following real-world example, where
a "CONFIG_" prefix snuck in, making an undefined symbol the default:
choice
prompt "Compiler optimization level"
default CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
config CC_OPTIMIZE_FOR_PERFORMANCE
...
config CC_OPTIMIZE_FOR_SIZE
...
endchoice
This now prints the following warning:
init/Kconfig:1036:warning: choice default symbol 'CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE' is not contained in the choice
Cases where the default symbol belongs to the wrong choice are also
detected.
(The mistake is harmless here: Since the default symbol is not visible,
the choice falls back on using the first visible symbol as the default,
which is CC_OPTIMIZE_FOR_PERFORMANCE, as intended.)
Discovered while playing around with Kconfiglib
(https://github.com/ulfalizer/Kconfiglib).
Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
sym_arr is of type struct symbol **.
So in malloc we need sizeof(struct symbol *).
The problem was indicated by coccinelle.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.
By default all files without license information are under the default
license of the kernel, which is GPL version 2.
Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier. The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.
This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.
How this work was done:
Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
- file had no licensing information it it.
- file was a */uapi/* one with no licensing information in it,
- file was a */uapi/* one with existing licensing information,
Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.
The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne. Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.
The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed. Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.
Criteria used to select files for SPDX license identifier tagging was:
- Files considered eligible had to be source code files.
- Make and config files were included as candidates if they contained >5
lines of source
- File already had some variant of a license header in it (even if <5
lines).
All documentation files were explicitly excluded.
The following heuristics were used to determine which SPDX license
identifiers to apply.
- when both scanners couldn't find any license traces, file was
considered to have no license information in it, and the top level
COPYING file license applied.
For non */uapi/* files that summary was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 11139
and resulted in the first patch in this series.
If that file was a */uapi/* path one, it was "GPL-2.0 WITH
Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 WITH Linux-syscall-note 930
and resulted in the second patch in this series.
- if a file had some form of licensing information in it, and was one
of the */uapi/* ones, it was denoted with the Linux-syscall-note if
any GPL family license was found in the file or had no licensing in
it (per prior point). Results summary:
SPDX license identifier # files
---------------------------------------------------|------
GPL-2.0 WITH Linux-syscall-note 270
GPL-2.0+ WITH Linux-syscall-note 169
((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21
((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17
LGPL-2.1+ WITH Linux-syscall-note 15
GPL-1.0+ WITH Linux-syscall-note 14
((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5
LGPL-2.0+ WITH Linux-syscall-note 4
LGPL-2.1 WITH Linux-syscall-note 3
((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3
((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1
and that resulted in the third patch in this series.
- when the two scanners agreed on the detected license(s), that became
the concluded license(s).
- when there was disagreement between the two scanners (one detected a
license but the other didn't, or they both detected different
licenses) a manual inspection of the file occurred.
- In most cases a manual inspection of the information in the file
resulted in a clear resolution of the license that should apply (and
which scanner probably needed to revisit its heuristics).
- When it was not immediately clear, the license identifier was
confirmed with lawyers working with the Linux Foundation.
- If there was any question as to the appropriate license identifier,
the file was flagged for further research and to be revisited later
in time.
In total, over 70 hours of logged manual review was done on the
spreadsheet to determine the SPDX license identifiers to apply to the
source files by Kate, Philippe, Thomas and, in some cases, confirmation
by lawyers working with the Linux Foundation.
Kate also obtained a third independent scan of the 4.13 code base from
FOSSology, and compared selected files where the other two scanners
disagreed against that SPDX file, to see if there was new insights. The
Windriver scanner is based on an older version of FOSSology in part, so
they are related.
Thomas did random spot checks in about 500 files from the spreadsheets
for the uapi headers and agreed with SPDX license identifier in the
files he inspected. For the non-uapi files Thomas did random spot checks
in about 15000 files.
In initial set of patches against 4.14-rc6, 3 files were found to have
copy/paste license identifier errors, and have been fixed to reflect the
correct identifier.
Additionally Philippe spent 10 hours this week doing a detailed manual
inspection and review of the 12,461 patched files from the initial patch
version early this week with:
- a full scancode scan run, collecting the matched texts, detected
license ids and scores
- reviewing anything where there was a license detected (about 500+
files) to ensure that the applied SPDX license was correct
- reviewing anything where there was no detection but the patch license
was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied
SPDX license was correct
This produced a worksheet with 20 files needing minor correction. This
worksheet was then exported into 3 different .csv files for the
different types of files to be modified.
These .csv files were then reviewed by Greg. Thomas wrote a script to
parse the csv files and add the proper SPDX tag to the file, in the
format that the file expected. This script was further refined by Greg
based on the output to detect more types of files automatically and to
distinguish between header and source .c files (which need different
comment types.) Finally Greg ran the script using the .csv files to
generate the patches.
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
It turns out that gperf-3.1 changed types in the generated code in ways
that aren't even trivially detectable without having to generate a test-file.
It's just not worth using tools and libraries from clowns that don't
understand or care about compatibility. So get rid of gperf.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
- Use more portable shebang for Perl scripts
- Remove trailing spaces from GCC version in kernel log
- Make initramfs generation deterministic
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Merge tag 'kbuild-misc-v4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull misc Kbuild updates from Masahiro Yamada:
- Use more portable shebang for Perl scripts
- Remove trailing spaces from GCC version in kernel log
- Make initramfs generation deterministic
* tag 'kbuild-misc-v4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
kbuild: create deterministic initramfs directory listings
scripts/mkcompile_h: Remove trailing spaces from compiler version
scripts: Switch to more portable Perl shebang
Fix sparse warnings in scripts/kconfig/nconf* ('make nconfig'):
../scripts/kconfig/nconf.c:1071:32: warning: Using plain integer as NULL pointer
../scripts/kconfig/nconf.c:1238:30: warning: Using plain integer as NULL pointer
../scripts/kconfig/nconf.c:511:51: warning: Using plain integer as NULL pointer
../scripts/kconfig/nconf.c:1460:6: warning: symbol 'setup_windows' was not declared. Should it be static?
../scripts/kconfig/nconf.c:274:12: warning: symbol 'current_instructions' was not declared. Should it be static?
../scripts/kconfig/nconf.c:308:22: warning: symbol 'function_keys' was not declared. Should it be static?
../scripts/kconfig/nconf.gui.c:132:17: warning: non-ANSI function declaration of function 'set_colors'
../scripts/kconfig/nconf.gui.c:195:24: warning: Using plain integer as NULL pointer
nconf.gui.o before/after files are the same.
nconf.o before/after files are the same until the 'static' function
declarations are added.
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
There is a check and a nice user-friendly message when the curses
library is not present on the system and the user wants to do "make
menuconfig". It doesn't get issued, though. Instead, we fail the build
when mconf.c doesn't find the curses.h header:
HOSTCC scripts/kconfig/mconf.o
In file included from scripts/kconfig/mconf.c:23:0:
scripts/kconfig/lxdialog/dialog.h:38:20: fatal error: curses.h: No such file or directory
#include CURSES_LOC
^
compilation terminated.
Make that check a prerequisite to mconf so that the user sees the error
message instead:
$ make menuconfig
*** Unable to find the ncurses libraries or the
*** required header files.
*** 'make menuconfig' requires the ncurses libraries.
***
*** Install ncurses (ncurses-devel) and try again.
***
scripts/kconfig/Makefile:203: recipe for target 'scripts/kconfig/dochecklxdialog' failed
make[1]: *** [scripts/kconfig/dochecklxdialog] Error 1
Makefile:548: recipe for target 'menuconfig' failed
make: *** [menuconfig] Error 2
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
The default NetBSD package manager is pkgsrc and it installs Perl
along other third party programs under custom and configurable prefix.
The default prefix for binary prebuilt packages is /usr/pkg, and the
Perl executable lands in /usr/pkg/bin/perl.
This change switches "/usr/bin/perl" to "/usr/bin/env perl" as it's
the most portable solution that should work for almost everybody.
Perl's executable is detected automatically.
This change switches -w option passed to the executable with more
modern "use warnings;" approach. There is no functional change to the
default behavior.
While there, drop "require 5" from scripts/namespace.pl (Perl from 1994?).
Signed-off-by: Kamil Rytarowski <n54@gmx.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
When building the kernel with clang, the compiler complains about the
presence of a condition inside two pairs of parentheses:
scripts/kconfig/gconf.c:917:19: error: equality comparison with
extraneous parentheses [-Werror,-Wparentheses-equality]
} else if ((col == COL_OPTION)) {
~~~~^~~~~~~~~~~~~
scripts/kconfig/gconf.c:917:19: note: remove extraneous parentheses
around the comparison to silence this warning
} else if ((col == COL_OPTION)) {
~ ^ ~
scripts/kconfig/gconf.c:917:19: note: use '=' to turn this equality
comparison into an assignment
} else if ((col == COL_OPTION)) {
^~
=
Silence this warning by removing a level of parentheses.
Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@m4x.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Pull kconfig updates from Michal Marek:
- 'make xconfig' gui fixes
- 'make nconfig' fix for options with long prompts
- fix 'make nconfig' warning when pkg-config forces -D_GNU_SOURCE
* 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
xconfig: fix missing suboption and help panels on first run
xconfig: fix 'Show Debug' functionality
kconfig/nconf: Fix hang when editing symbol with a long prompt
Scripts: kconfig: nconf: fix _GNU_SOURCE redefined warning
Pull timer updates from Thomas Gleixner:
"The time/timekeeping/timer folks deliver with this update:
- Fix a reintroduced signed/unsigned issue and cleanup the whole
signed/unsigned mess in the timekeeping core so this wont happen
accidentaly again.
- Add a new trace clock based on boot time
- Prevent injection of random sleep times when PM tracing abuses the
RTC for storage
- Make posix timers configurable for real tiny systems
- Add tracepoints for the alarm timer subsystem so timer based
suspend wakeups can be instrumented
- The usual pile of fixes and updates to core and drivers"
* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (23 commits)
timekeeping: Use mul_u64_u32_shr() instead of open coding it
timekeeping: Get rid of pointless typecasts
timekeeping: Make the conversion call chain consistently unsigned
timekeeping_Force_unsigned_clocksource_to_nanoseconds_conversion
alarmtimer: Add tracepoints for alarm timers
trace: Update documentation for mono, mono_raw and boot clock
trace: Add an option for boot clock as trace clock
timekeeping: Add a fast and NMI safe boot clock
timekeeping/clocksource_cyc2ns: Document intended range limitation
timekeeping: Ignore the bogus sleep time if pm_trace is enabled
selftests/timers: Fix spelling mistake "Asyncrhonous" -> "Asynchronous"
clocksource/drivers/bcm2835_timer: Unmap region obtained by of_iomap
clocksource/drivers/arm_arch_timer: Map frame with of_io_request_and_map()
arm64: dts: rockchip: Arch counter doesn't tick in system suspend
clocksource/drivers/arm_arch_timer: Don't assume clock runs in suspend
posix-timers: Make them configurable
posix_cpu_timers: Move the add_device_randomness() call to a proper place
timer: Move sys_alarm from timer.c to itimer.c
ptp_clock: Allow for it to be optional
Kconfig: Regenerate *.c_shipped files after previous changes
...
qconfig initial slider sizes fix.
On first `make xconfig`, suboption and help panels were hidden.
Now we properly detect the first run, and show those panels.
Reported-by: Jason Vas Dias <jason.vas.dias@gmail.com>
Signed-off-by: Boris Barbulovski <bbarbulovski@gmail.com>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Michal Marek <mmarek@suse.com>
xconfig - Fix missing 'Show Debug' functionality.
xconfig Help mentions 'Show Debug Info' but it was missing from any
menu.
* Add 'Show debug' menu to the main menu.
* Properly load showDebug settings.
Reported-by: Jason Vas Dias <jason.vas.dias@gmail.com>
Signed-off-by: Boris Barbulovski <bbarbulovski@gmail.com>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Michal Marek <mmarek@suse.com>
Currently it is impossible to edit the value of a config symbol with a
prompt longer than (terminal width - 2) characters. dialog_inputbox()
calculates a negative x-offset for the input window and newwin() fails
as this is invalid. It also doesn't check for this failure, so it
busy-loops calling wgetch(NULL) which immediately returns -1.
The additions in the offset calculations also don't match the intended
size of the window.
Limit the window size and calculate the offset similarly to
show_scroll_win().
Cc: stable <stable@vger.kernel.org>
Fixes: 692d97c380 ("kconfig: new configuration interface (nconfig)")
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Some people are able to trigger a race where autoksyms.h is used before
its empty version is even created. Let's create it at the same time as
the directory holding it is created.
Signed-off-by: Nicolas Pitre <nico@linaro.org>
Tested-by: Prarit Bhargava <prarit@redhat.com>
Tested-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fix below warning when make nconfig is run initially
or after make clean.
HOSTCC scripts/kconfig/nconf.o
scripts/kconfig/nconf.c:8:0: warning: "_GNU_SOURCE" redefined
#define _GNU_SOURCE
^
<command-line>:0:0: note: this is the location of the previous definition
Signed-off-by: Cheah Kok Cheong <thrust73@gmail.com>
Signed-off-by: Michal Marek <mmarek@suse.com>
The "imply" keyword is a weak version of "select" where the target
config symbol can still be turned off, avoiding those pitfalls that come
with the "select" keyword.
This is useful e.g. with multiple drivers that want to indicate their
ability to hook into a secondary subsystem while allowing the user to
configure that subsystem out without also having to unset these drivers.
Currently, the same effect can almost be achieved with:
config DRIVER_A
tristate
config DRIVER_B
tristate
config DRIVER_C
tristate
config DRIVER_D
tristate
[...]
config SUBSYSTEM_X
tristate
default DRIVER_A || DRIVER_B || DRIVER_C || DRIVER_D || [...]
This is unwieldy to maintain especially with a large number of drivers.
Furthermore, there is no easy way to restrict the choice for SUBSYSTEM_X
to y or n, excluding m, when some drivers are built-in. The "select"
keyword allows for excluding m, but it excludes n as well. Hence
this "imply" keyword. The above becomes:
config DRIVER_A
tristate
imply SUBSYSTEM_X
config DRIVER_B
tristate
imply SUBSYSTEM_X
[...]
config SUBSYSTEM_X
tristate
This is much cleaner, and way more flexible than "select". SUBSYSTEM_X
can still be configured out, and it can be set as a module when none of
the drivers are configured in or all of them are modular.
Signed-off-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: John Stultz <john.stultz@linaro.org>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Cc: Paul Bolle <pebolle@tiscali.nl>
Cc: linux-kbuild@vger.kernel.org
Cc: netdev@vger.kernel.org
Cc: Michal Marek <mmarek@suse.com>
Cc: Edward Cree <ecree@solarflare.com>
Link: http://lkml.kernel.org/r/1478841010-28605-2-git-send-email-nicolas.pitre@linaro.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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
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>
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>
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>
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>
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>
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>
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>
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>
Prior to 3.13 make allmodconfig KCONFIG_ALLCONFIG=/dev/null used
to be equivalent to make allmodconfig; these days it hardwires MODULES to n.
In fact, any KCONFIG_ALLCONFIG that doesn't set MODULES explicitly is
treated as if it set it to n.
Regression had been introduced by commit cfa98f ("kconfig: do not
override symbols already set"); what happens is that conf_read_simple()
does sym_calc_value(modules_sym) on exit, which leaves SYMBOL_VALID set and
has conf_set_all_new_symbols() skip modules_sym.
It's pretty easy to fix - simply move that call of sym_calc_value()
into the callers, except for the ones in KCONFIG_ALLCONFIG handling.
Objections?
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Fixes: cfa98f2e0a ("kconfig: do not override symbols already set")
Signed-off-by: Michal Marek <mmarek@suse.com>
Documentation/Changes still lists this as the minimal required version,
so it ought to remain usable for the time being.
Fixes: d2036f30cf ("scripts/kconfig/Makefile: Allow KBUILD_DEFCONFIG to be a target")
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Michal Marek <mmarek@suse.com>
On Debian stable (qt-4.8.6) 'make xconfig' intermittently fails due to
qconf segfaulting at exit time in QXcbEventReader. The cause of this is
destructors on the heap objects never being called, so fix this by
properly deleting the heap objects before exit.
Signed-off-by: Chris Bainbridge <chris.bainbridge@gmail.com>
Signed-off-by: Michal Marek <mmarek@suse.com>
menu_is_visible() is a bool function and should use boolean return
values. "no" is a tristate value which happens to also have a value
of 0, but we should nevertheless use the right symbol for it.
This is a very minor cleanup with no semantic change.
Fixes: 86e187ff9 ("kconfig: add an option to determine a menu's visibility")
Cc: Arnaud Lacombe <lacombar@gmail.com>
Cc: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
Signed-off-by: Michal Marek <mmarek@suse.com>
The current (arbitrary) limit of 128 characters for path names has
proven too short for Android builds, as longer path names are used
there.
Change conf.c, so it can handle path lengths up to PATH_MAX characters.
Signed-off-by: Markus Mayer <mmayer@broadcom.com>
Signed-off-by: Michal Marek <mmarek@suse.com>
Pull kconfig updates from Michal Marek:
- 'make xconfig' ported to Qt5, dropping support for Qt3
- merge_config.sh supports a single-input-file mode and also respects
$KCONFIG_CONFIG
- Fix for incorrect display of >= and > in dependency expressions
* 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild: (44 commits)
Add current selection check.
Use pkg-config to find Qt 4 and 5 instead of direct qmake
kconfig: Fix copy&paste error
kconfig/merge_config.sh: Accept a single file
kconfig/merge_config.sh: Support KCONFIG_CONFIG
Update the buildsystem for KConfig finding Qt
Port xconfig to Qt5 - Update copyright.
Port xconfig to Qt5 - Fix goParent issue.
Port xconfig to Qt5 - on Back clicked, deselect old item.
Port xconfig to Qt5 - Add(back) one click checkbox toggle.
Port xconfig to Qt5 - Add(back) lineedit editing.
Port xconfig to Qt5 - Remove some commented code.
Port xconfig to Qt5 - Source format.
Port xconfig to Qt5 - Add horizontal scrollbar, and scroll per pixel.
Port xconfig to Qt5 - Change ConfigItem constructor parent type.
Port xconfig to Qt5 - Disable ConfigList soring
Port xconfig to Qt5 - Remove ConfigList::updateMenuList template.
Port xconfig to Qt5 - Add ConfigList::mode to initializer list.
Port xconfig to Qt5 - Add ConfigItem::nextItem to initializer list.
Port xconfig to Qt5 - Tree widget set column titles.
...
Signed-off-by: Boris Barbulovski <bbarbulovski@gmail.com>
Signed-off-by: Thiago Macieira <thiago.macieira@intel.com>
[mmarek: I missed it in the original Qt5 patch set, which caused a crash]
Signed-off-by: Michal Marek <mmarek@suse.com>
The Qt Project recommendation is that there should always be a "qmake"
binary and it should never be renamed. If it's necessary to handle
multiple Qt versions, the Qt Project recommends using qtchooser.
Unfortunately, some distros do not follow the recommendation, so we
would need to check qmake-qt4, qmake-qt5, etc. So, instead, let's try
pkg-config.
Signed-off-by: Thiago Macieira <thiago.macieira@intel.com>
Reported-by: Alexey Brodkin <abrodkin@synopsys.com>
Acked-by: Alexey Brodkin <abrodkin@synopsys.com>
Signed-off-by: Michal Marek <mmarek@suse.com>
Fixes: 31847b67be ("kconfig: allow use of relations other than (in)equality")
Signed-off-by: Michal Sojka <sojkam1@fel.cvut.cz>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
My recent commit d2036f30cf ("scripts/kconfig/Makefile: Allow
KBUILD_DEFCONFIG to be a target"), contained a bug in that when it
checks if KBUILD_DEFCONFIG is a file it forgets to prepend $(srctree) to
the path.
This causes the build to fail when building out of tree (with O=), and
when the value of KBUILD_DEFCONFIG is 'defconfig'. In that case we will
fail to find the 'defconfig' file, because we look in the build
directory not $(srctree), and so we will call Make again with
'defconfig' as the target. From there we loop infinitely calling 'make
defconfig' again and again.
The fix is simple, we need to look for the file under $(srctree).
Fixes: d2036f30cf ("scripts/kconfig/Makefile: Allow KBUILD_DEFCONFIG to be a target")
Reported-by: Olof Johansson <olof@lixom.net>
Acked-by: Michal Marek <mmarek@suse.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
merge_config.sh can usefully be applied to a single file.
It implicitly merges with the default configuration.
Signed-off-by: Gabriel de Perthuis <g2p.code@gmail.com>
Signed-off-by: Michal Marek <mmarek@suse.com>
All make targets support $KCONFIG_CONFIG because they
run scripts/kconf. Make sure merge_config.sh accesses the
correct file in all cases.
Previously this script broke in two different code paths,
one for targets like kvmconfig (which use merge_config.sh -m
then call a target that respects KCONFIG_CONFIG) and one for
direct use of the script without -m, which called make rules
that edit KCONFIG_CONFIG but verified a different file.
Signed-off-by: Gabriel de Perthuis <g2p.code@gmail.com>
Signed-off-by: Michal Marek <mmarek@suse.com>
The buildsystem will now only search for Qt 4 and Qt 5. Support for Qt 2
and 3 was dropped in the previous commits (Qt 3 was EOL'ed in 2010 or
so...).
For Qt 5, to be future-proof with the future direction notice appearing
in the 5.5 release, C++11 support is automatically enabled.
Signed-off-by: Thiago Macieira <thiago.macieira@intel.com>
Signed-off-by: Michal Marek <mmarek@suse.com>
Signed-off-by: Boris Barbulovski <bbarbulovski@gmail.com>
Signed-off-by: Thiago Macieira <thiago.macieira@intel.com>
Signed-off-by: Michal Marek <mmarek@suse.com>
Signed-off-by: Boris Barbulovski <bbarbulovski@gmail.com>
Signed-off-by: Thiago Macieira <thiago.macieira@intel.com>
Signed-off-by: Michal Marek <mmarek@suse.com>
Signed-off-by: Boris Barbulovski <bbarbulovski@gmail.com>
Signed-off-by: Thiago Macieira <thiago.macieira@intel.com>
Signed-off-by: Michal Marek <mmarek@suse.com>
Signed-off-by: Boris Barbulovski <bbarbulovski@gmail.com>
Signed-off-by: Thiago Macieira <thiago.macieira@intel.com>
Signed-off-by: Michal Marek <mmarek@suse.com>
Signed-off-by: Boris Barbulovski <bbarbulovski@gmail.com>
Signed-off-by: Thiago Macieira <thiago.macieira@intel.com>
Signed-off-by: Michal Marek <mmarek@suse.com>
Signed-off-by: Boris Barbulovski <bbarbulovski@gmail.com>
Signed-off-by: Thiago Macieira <thiago.macieira@intel.com>
Signed-off-by: Michal Marek <mmarek@suse.com>
Masahiro Yamada
Linus Torvalds
Marco Ammon
Mauro Carvalho Chehab
Thomas Gleixner
Alexander Popov
Jacob Garber
Petr Vorel
Changbin Du
Anders Roxell
Petr Vorel
Lukas Bulwahn
Randy Dunlap
Dirk Gouders
Laura Abbott
Jerry James
Sam Ravnborg
Nathan Chancellor
Don Zickus
Ulf Magnusson
Eugeniu Rosca
Arvind Prasanna
Marc Herbert
Yaakov Selkowitz
Nicolas Pitre
Heinrich Schuchardt
Greg Kroah-Hartman
Borislav Petkov
Kamil Rytarowski
Nicolas Iooss
Boris Barbulovski
Ben Hutchings
Cheah Kok Cheong
Paul Bolle
Benjamin Poirier
Al Viro
Jan Beulich
Chris Bainbridge
Vegard Nossum
Markus Mayer
Thiago Macieira
Michal Sojka
Michael Ellerman
Gabriel de Perthuis