Pull parisc fixes from Helge Deller:
"This time we made the kernel- and interruption stack allocation
reentrant which fixed some strange kernel crashes (specifically
protection ID traps).
Furthemore this patchset fixes the interrupt stack in UP and SMP
configurations by using native locking instructions. And finally
usage of floating point calculations on parisc were disabled in the
MPILIB."
* 'parisc-for-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
parisc: fix irq stack on UP and SMP
parisc/superio: Use module_pci_driver to register driver
parisc: make interrupt and interruption stack allocation reentrant
parisc: show number of FPE and unaligned access handler calls in /proc/interrupts
parisc: add additional parisc git tree to MAINTAINERS file
parisc: use PAGE_SHIFT instead of hardcoded value 12 in pacache.S
parisc: add rp5470 entry to machine database
MPILIB: disable usage of floating point registers on parisc
kcore_vmalloc is in fs/proc/kcore.c and kcore_mem is unused across
the tree. Noticed while grepping the tree for some other kcore stuff.
(score looks pretty unmaintained to me.)
Signed-off-by: Kyle McMartin <kyle@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Fallouts/wreckage of Cache Flush optimizations / aliasing dcache support
* Fix for an interesting bug where piped input to grep was getting
mysteriously clobbered
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.11 (GNU/Linux)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=j1po
-----END PGP SIGNATURE-----
Merge tag 'arc-v3.10-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc
Pull ARC fixes from Vineet Gupta:
- Fallouts/wreckage of Cache Flush optimizations / aliasing dcache
support
- Fix for an interesting bug where piped input to grep was getting
mysteriously clobbered
* tag 'arc-v3.10-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
ARC: lazy dcache flush broke gdb in non-aliasing configs
ARC: Use enough bits for determining page's cache color
ARC: Brown paper bag bug in macro for checking cache color
ARC: copy_(to|from)_user() to honor usermode-access permissions
ARC: [mm] Prevent stray dcache lines after__sync_icache_dcach()
ARC: [TB10x] Remove redundant abilis,simple-pinctrl mechanism
Pull ARM fixes from Russell King:
"Just three this time, all really quite small"
* 'fixes' of git://git.linaro.org/people/rmk/linux-arm:
ARM: 7729/1: vfp: ensure VFP_arch is non-zero when VFP is not supported
ARM: 7727/1: remove the .vm_mm value from gate_vma
ARM: 7723/1: crypto: sha1-armv4-large.S: fix SP handling
gdbserver inserting a breakpoint ends up calling copy_user_page() for a
code page. The generic version of which (non-aliasing config) didn't set
the PG_arch_1 bit hence update_mmu_cache() didn't sync dcache/icache for
corresponding dynamic loader code page - causing garbade to be executed.
So now aliasing versions of copy_user_highpage()/clear_page() are made
default. There is no significant overhead since all of special alias
handling code is compiled out for non-aliasing build
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
We didn't have any fixes sent up for -rc2, so this is a slightly larger
batch. A bit all over the place platform-wise; OMAP, at91, marvell,
renesas, sunxi, ux500, etc.
I tried to summarize highlights but there isn't a whole lot to point
out. Lots of little things fixed all over. A couple of defconfig updates
due to new/changing options.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.11 (GNU/Linux)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=8tMi
-----END PGP SIGNATURE-----
Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Olof Johansson:
"We didn't have any fixes sent up for -rc2, so this is a slightly
larger batch. A bit all over the place platform-wise; OMAP, at91,
marvell, renesas, sunxi, ux500, etc.
I tried to summarize highlights but there isn't a whole lot to point
out. Lots of little things fixed all over. A couple of defconfig
updates due to new/changing options."
* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (44 commits)
ARM: at91/sama5: fix incorrect PMC pcr div definition
ARM: at91/dt: fix macb pinctrl_macb_rmii_mii_alt definition
ARM: at91: at91sam9n12: move external irq declatation to DT
ARM: shmobile: marzen: Use error values in usb_power_*
ARM: tegra: defconfig fixes
ARM: nomadik: fix IRQ assignment for SMC ethernet
ARM: vt8500: Add missing NULL terminator in dt_compat
clk: tegra: add ac97 controller clock
clk: tegra: remove USB from clk init table
ARM: dts: mvebu: Fix wrong the address reg value for the L2-cache node
ARM: plat-orion: Fix num_resources and id for ge10 and ge11
ARM: OMAP2+: hwmod: Remove sysc slave idle and auto idle apis
SERIAL: OMAP: Remove the slave idle handling from the driver
ARM: OMAP2+: serial: Remove the un-used slave idle hooks
ARM: OMAP2+: hwmod-data: UART IP needs software control to manage sidle modes
ARM: OMAP2+: hwmod: Add a new flag to handle SIDLE in SWSUP only in active
ARM: OMAP2+: hwmod: Fix sidle programming in _enable_sysc()/_idle_sysc()
arm: mvebu: fix the 'ranges' property to handle PCIe
ARM: mvebu: select ARCH_REQUIRE_GPIOLIB for mvebu platform
ARM: AM33XX: Add missing .clkdm_name to clkdiv32k_ick clock
...
- Fix build breakage in pinctrl driver when no other architecture is selected
- Fix Mini X-plus device tree build
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.12 (GNU/Linux)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=n8M7
-----END PGP SIGNATURE-----
Merge tag 'sunxi-fixes-for-3.10' of git://github.com/mripard/linux into fixes
From Maxime Ripard:
Small set of fixes for 3.10:
- Fix build breakage in pinctrl driver when no other architecture is selected
- Fix Mini X-plus device tree build
* tag 'sunxi-fixes-for-3.10' of git://github.com/mripard/linux:
ARM: sunxi: select ARCH_REQUIRE_GPIOLIB
ARM: sunxi: Fix Mini X-plus device tree build
Signed-off-by: Olof Johansson <olof@lixom.net>
The logic to detect if the irq stack was already in use with
raw_spin_trylock() is wrong, because it will generate a "trylock failure
on UP" error message with CONFIG_SMP=n and CONFIG_DEBUG_SPINLOCK=y.
arch_spin_trylock() can't be used either since in the CONFIG_SMP=n case
no atomic protection is given and we are reentrant here. A mutex didn't
worked either and brings more overhead by turning off interrupts.
So, let's use the fastest path for parisc which is the ldcw instruction.
Counting how often the irq stack was used is pretty useless, so just
drop this piece of code.
Signed-off-by: Helge Deller <deller@gmx.de>
The get_stack_use_cr30 and get_stack_use_r30 macros allocate a stack
frame for external interrupts and interruptions requiring a stack frame.
They are currently not reentrant in that they save register context
before the stack is set or adjusted.
I have observed a number of system crashes where there was clear
evidence of stack corruption during interrupt processing, and as a
result register corruption. Some interruptions can still occur during
interruption processing, however external interrupts are disabled and
data TLB misses don't occur for absolute accesses. So, it's not entirely
clear what triggers this issue. Also, if an interruption occurs when
Q=0, it is generally not possible to recover as the shadowed registers
are not copied.
The attached patch reworks the get_stack_use_cr30 and get_stack_use_r30
macros to allocate stack before doing register saves. The new code is a
couple of instructions shorter than the old implementation. Thus, it's
an improvement even if it doesn't fully resolve the stack corruption
issue. Based on limited testing, it improves SMP system stability.
Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
AT91 peripherals on SAMA5.
Two DT related fixes.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.11 (GNU/Linux)
iQEcBAABAgAGBQJRn4e+AAoJEAf03oE53VmQDTUH/ip4XID1+2KH1n64Dejl+TzO
m1RWz3Sesjv9MsndTeoZjXaBt24Bxn/u18XZv67rzf3nlGlGn29zmbux0zKncPSV
IWLZGoDorLO2URegNjDXD2Sk8/SLHqDaDzjDxnfuwfiSiE/qiCVTmvfGlkUNM/G5
qCu/k9jJ3NRyPFm9yzBqhLreWp9XKvXnVtHbOxjkqBz1AKSsfXa/iQc2Ekkb6k8/
YANAlG+MIZe/DWWtLT94XQkV15rorDgylQkQPfK+KDn6vUTKxm30BbcKXK2mxqir
NtbOXfQoheSATVs4fzIS3IW1Jo8WZXGBd5DOfXFiCI152q0d9RbvD5vsmqUnws8=
=3mcQ
-----END PGP SIGNATURE-----
Merge tag 'at91-fixes' of git://github.com/at91linux/linux-at91 into fixes
From Nicolas Ferre:
- One definition fix that can lead to mis-clock some AT91 peripherals on SAMA5.
- Two DT related fixes.
* tag 'at91-fixes' of git://github.com/at91linux/linux-at91:
ARM: at91/sama5: fix incorrect PMC pcr div definition
ARM: at91/dt: fix macb pinctrl_macb_rmii_mii_alt definition
ARM: at91: at91sam9n12: move external irq declatation to DT
Signed-off-by: Olof Johansson <olof@lixom.net>
Pull powerpc fixes from Benjamin Herrenschmidt:
"Some more P8 related bits, a bunch of fixes for our P7+/P8 HW crypto
drivers, some added workarounds for those radeons that don't do proper
64-bit MSIs and a couple of other trivialities by myself."
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
powerpc/pseries: Make 32-bit MSI quirk work on systems lacking firmware support
powerpc/powernv: Build a zImage.epapr
powerpc: Make radeon 32-bit MSI quirk work on powernv
powerpc: Context switch more PMU related SPRs
powerpc/powernv: Fix condition for when to invalidate the TCE cache
powerpc/pci: Fix bogus message at boot about empty memory resources
powerpc: Fix TLB cleanup at boot on POWER8
drivers/crypto/nx: Fixes for multiple races and issues
The PA24 pin is wrongly assigned to peripheral B.
In the current config there is 2 ETX3 pins (PA11 and PA24) and
no ETXER pin (PA22).
Signed-off-by: Boris BREZILLON <b.brezillon@overkiz.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: stable <stable@vger.kernel.org> # 3.8+
Recent commit e61133dda4 added support
for a new firmware feature to force an adapter to use 32 bit MSIs.
However, this firmware is not available for all systems. The hack below
allows devices needing 32 bit MSIs to work on these systems as well.
It is careful to only enable this on Gen2 slots, which should limit
this to configurations where this hack is needed and tested to work.
[Small change to factor out the hack into a separate function -- BenH]
Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
The zImage.epapr wrapper allows to use zImages when booting via a flat
device-tree which can be used on powernv.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This moves the quirk itself to pci_64.c as to get built on all ppc64
platforms (the only ones with a pci_dn), factors the two implementations
of get_pdn() into a single pci_get_dn() and use the quirk to do 32-bit
MSIs on IODA based powernv platforms.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
In commit 9353374 "Context switch the new EBB SPRs" we added support for
context switching some new EBB SPRs. However despite four of us signing
off on that patch we missed some. To be fair these are not actually new
SPRs, but they are now potentially user accessible so need to be context
switched.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
We use two flags, one to indicate an invalidation is needed after
creating a new entry and one to indicate an invalidation is needed
after removing an entry. However we were testing the wrong flag
in the remove case.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
The message is only meant to be displayed if resource 0 is empty,
but was displayed if any is.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
The TLB has 512 congruence classes (2048 entries 4 way set associative)
while P7 had 128
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Moorestown
Revert "x86/pci/mrst: Use configuration mechanism 1 for 00:00.0, 00:02.0, 00:03.0"
Hotplug
PCI: acpiphp: Re-enumerate devices when host bridge receives Bus Check
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.11 (GNU/Linux)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=M8/H
-----END PGP SIGNATURE-----
Merge tag 'pci-v3.10-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull PCI updates from Bjorn Helgaas:
"Here are some more fixes for v3.10. The Moorestown update broke Intel
Medfield devices, so I reverted it. The acpiphp change fixes a
regression: we broke hotplug notifications to host bridges when we
split acpiphp into the host-bridge related part and the
endpoint-related part.
Moorestown
Revert "x86/pci/mrst: Use configuration mechanism 1 for 00:00.0, 00:02.0, 00:03.0"
Hotplug
PCI: acpiphp: Re-enumerate devices when host bridge receives Bus Check"
* tag 'pci-v3.10-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
Revert "x86/pci/mrst: Use configuration mechanism 1 for 00:00.0, 00:02.0, 00:03.0"
PCI: acpiphp: Re-enumerate devices when host bridge receives Bus Check
Here are a number of tiny USB bugfixes / new device ids for 3.10-rc2
The majority of these are USB gadget fixes, but they are all small.
Other than that, some USB host controller fixes, and USB serial driver
fixes for problems reported with them.
Also hopefully a fixed up USB_OTG Kconfig dependancy, that one seems to
be almost impossible to get right for all of the different platforms
these days.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.19 (GNU/Linux)
iEYEABECAAYFAlGeP/gACgkQMUfUDdst+ykXygCfeIL5/HMREhUSHQgb6IiIDR81
QHAAn0zJfRAyWUz4AtbrRsLSVfk3Q9vm
=DQIq
-----END PGP SIGNATURE-----
Merge tag 'usb-3.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB fixes from Greg Kroah-Hartman:
"Here are a number of tiny USB bugfixes / new device ids for 3.10-rc2
The majority of these are USB gadget fixes, but they are all small.
Other than that, some USB host controller fixes, and USB serial driver
fixes for problems reported with them.
Also hopefully a fixed up USB_OTG Kconfig dependancy, that one seems
to be almost impossible to get right for all of the different
platforms these days."
* tag 'usb-3.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (56 commits)
USB: cxacru: potential underflow in cxacru_cm_get_array()
USB: ftdi_sio: Add support for Newport CONEX motor drivers
USB: option: add device IDs for Dell 5804 (Novatel E371) WWAN card
usb: ohci: fix goto wrong tag in err case
usb: isp1760-if: fix memleak when platform_get_resource fail
usb: ehci-s5p: fix memleak when fallback to pdata
USB: serial: clean up chars_in_buffer
USB: ti_usb_3410_5052: fix chars_in_buffer overhead
USB: io_ti: fix chars_in_buffer overhead
USB: ftdi_sio: fix chars_in_buffer overhead
USB: ftdi_sio: clean up get_modem_status
USB: serial: add generic wait_until_sent implementation
USB: serial: add wait_until_sent operation
USB: set device dma_mask without reference to global data
USB: Blacklisted Cinterion's PLxx WWAN Interface
usb: option: Add Telewell TW-LTE 4G
USB: EHCI: remove bogus #error
USB: reset resume quirk needed by a hub
USB: usb-stor: realtek_cr: Fix compile error
usb, chipidea: fix link error when USB_EHCI_HCD is a module
...
Pull kvm bugfixes from Gleb Natapov.
* git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM/MIPS32: Wrap calls to gfn_to_pfn() with srcu_read_lock/unlock()
KVM/MIPS32: Move include/asm/kvm.h => include/uapi/asm/kvm.h since it is a user visible API.
KVM: take over co-maintainership from Marcelo, fix MAINTAINERS entry
The current code uses 2 bits for determining page's dcache color, thus
sorting pages into 4 bins, whereas the aliasing dcache really has 2 bins
(8k page, 64k dcache - 4 way-set-assoc).
This can cause extraneous flushes - e.g. color 0 and 2.
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
The VM_EXEC check in update_mmu_cache() was getting optimized away
because of a stupid error in definition of macro addr_not_cache_congruent()
The intention was to have the equivalent of following:
if (a || (1 ? b : 0))
but we ended up with following:
if (a || 1 ? b : 0)
And because precedence of '||' is more that that of '?', gcc was optimizing
away evaluation of <a>
Nasty Repercussions:
1. For non-aliasing configs it would mean some extraneous dcache flushes
for non-code pages if U/K mappings were not congruent.
2. For aliasing config, some needed dcache flush for code pages might
be missed if U/K mappings were congruent.
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
This manifested as grep failing psuedo-randomly:
-------------->8---------------------
[ARCLinux]$ ip address show lo | grep inet
[ARCLinux]$ ip address show lo | grep inet
[ARCLinux]$ ip address show lo | grep inet
[ARCLinux]$
[ARCLinux]$ ip address show lo | grep inet
inet 127.0.0.1/8 scope host lo
-------------->8---------------------
ARC700 MMU provides fully orthogonal permission bits per page:
Ur, Uw, Ux, Kr, Kw, Kx
The user mode page permission templates used to have all Kernel mode
access bits enabled.
This caused a tricky race condition observed with uClibc buffered file
read and UNIX pipes.
1. Read access to an anon mapped page in libc .bss: write-protected
zero_page mapped: TLB Entry installed with Ur + K[rwx]
2. grep calls libc:getc() -> buffered read layer calls read(2) with the
internal read buffer in same .bss page.
The read() call is on STDIN which has been redirected to a pipe.
read(2) => sys_read() => pipe_read() => copy_to_user()
3. Since page has Kernel-write permission (despite being user-mode
write-protected), copy_to_user() suceeds w/o taking a MMU TLB-Miss
Exception (page-fault for ARC). core-MM is unaware that kernel
erroneously wrote to the reserved read-only zero-page (BUG #1)
4. Control returns to userspace which now does a write to same .bss page
Since Linux MM is not aware that page has been modified by kernel, it
simply reassigns a new writable zero-init page to mapping, loosing the
prior write by kernel - effectively zero'ing out the libc read buffer
under the hood - hence grep doesn't see right data (BUG #2)
The fix is to make all kernel-mode access permissions mirror the
user-mode ones. Note that the kernel still has full access to pages,
when accessed directly (w/o MMU) - this fix ensures that kernel-mode
access in copy_to_from() path uses the same faulting access model as for
pure user accesses to keep MM fully aware of page state.
The issue is peudo-random because it only shows up if the TLB entry
installed in #1 is present at the time of #3. If it is evicted out, due
to TLB pressure or some-such, then copy_to_user() does take a TLB Miss
Exception, with a routine write-to-anon COW processing installing a
fresh page for kernel writes and also usable as it is in userspace.
Further the issue was dormant for so long as it depends on where the
libc internal read buffer (in .bss) is mapped at runtime.
If it happens to reside in file-backed data mapping of libc (in the
page-aligned slack space trailing the file backed data), loader zero
padding the slack space, does the early cow page replacement, setting
things up at the very beginning itself.
With gcc 4.8 based builds, the libc buffer got pushed out to a real
anon mapping which triggers the issue.
Reported-by: Anton Kolesov <akolesov@synopsys.com>
Cc: <stable@vger.kernel.org> # 3.9
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Flush and INVALIDATE the dcache page.
This helper is only used for writeback of CODE pages to memory. So
there's no value in keeping the dcache lines around. Infact it is risky
as a writeback on natural eviction under pressure can cause un-needed
writeback with weird issues on aliasing dcache configurations.
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Pull AVR32 update from Hans-Christian Egtvedt:
"wow, it has gone 10 releases since my last request :("
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/egtvedt/linux-avr32:
avr32: fix building warnings caused by redefinitions of HZ
avr32: fix relocation check for signed 18-bit offset
avr32: move NODES_SHIFT into Kconfig and delete numnodes.h
Pull MIPS update from Ralf Baechle:
- Fix a build error if <linux/printk.h> is included without
<linux/linkage.h> having been included before.
- Cleanup and fix the damage done by the generic idle loop patch.
- A kprobes fix that brings the MIPS code in line with what other
architectures are for quite a while already.
- Wire up the native getdents64(2) syscall for 64 bit - for some reason
it was only for the compat ABIs. This has been reported to cause an
application issue. This turned out bigger than I meant but the wait
instruction support code was driving me nuts.
* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
MIPS: N64: Wire getdents64(2)
kprobes/mips: Fix to check double free of insn slot
MIPS: Idle: Break r4k_wait into two functions and fix it.
MIPS: Idle: Do address fiddlery in helper functions.
MIPS: Idle: Consolidate all declarations in <asm/idle.h>.
MIPS: Idle: Don't call local_irq_disable() in cpu_wait() implementations.
MIPS: Idle: Re-enable irqs at the end of r3081, au1k and loongson2 cpu_wait.
MIPS: Idle: Make call of function pointer readable.
MIPS: Idle: Consistently reformat inline assembler.
MIPS: Idle: cleaup SMTC idle hook as per Linux coding style.
MIPS: Consolidate idle loop / WAIT instruction support in a single file.
MIPS: clock.h: Remove declaration of cpu_wait.
Add include dependencies to <linux/printk.h>.
MIPS: Rewrite pfn_valid to work in modules, too.
Commit d3f79584a8 ("ARM: cleanup undefined instruction entry code")
improved the register scheduling when handling undefined instructions.
A side effect of this is that r5 is now used as a temporary, whilst the
VFP probing code relies on r5 containing a non-zero value when VFP is
not supported.
This patch fixes the VFP detection code so that we don't rely on the
contents of r5. Without this patch, Linux dies loudly on CPUs without
VFP support.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
If one reads /proc/$PID/smaps, the mmap_sem belonging to the
address space of the task being examined is locked for reading.
All the pages of the vmas belonging to the task's address space
are then walked with this lock held.
If a gate_vma is present in the architecture, it too is examined
by the fs/proc/task_mmu.c code. As gate_vma doesn't belong to the
address space of the task though, its pages are not walked.
A recent cleanup (commit f6604efe) of the gate_vma initialisation
code set the vm_mm value to &init_mm. Unfortunately a non-NULL
vm_mm value in the gate_vma will cause the task_mmu code to attempt
to walk the pages of the gate_vma (with no mmap-sem lock held). If
one enables Transparent Huge Page support and vm debugging, this
will then cause OOPses as pmd_trans_huge_lock is called without
mmap_sem being locked.
This patch removes the .vm_mm value from gate_vma, restoring the
original behaviour of the task_mmu code.
Signed-off-by: Steve Capper <steve.capper@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Make the SHA1 asm code ABI conformant by making sure all stack
accesses occur above the stack pointer.
Origin:
http://git.openssl.org/gitweb/?p=openssl.git;a=commit;h=1a9d60d2
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Nicolas Pitre <nico@linaro.org>
Cc: stable@vger.kernel.org
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.12 (GNU/Linux)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=GyZI
-----END PGP SIGNATURE-----
Merge tag 'renesas-boards-marzen-fixes-for-v3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas into fixes
From Simon Horman:
Correct USB PHY initialisation on the marzen board.
* tag 'renesas-boards-marzen-fixes-for-v3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
ARM: shmobile: marzen: Use error values in usb_power_*
Signed-off-by: Olof Johansson <olof@lixom.net>
with DT.
Basic build, boot, and PM test logs are here - unfortunately, not for
the DT case yet:
http://www.pwsan.com/omap/testlogs/uart_idle_fix_v3.10-rc/20130519164010/
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.12 (GNU/Linux)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=DRuE
-----END PGP SIGNATURE-----
Merge tag 'omap-fixes-a-for-3.10-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/pjw/omap-pending into fixes
From Paul Walmsley:
Fix the OMAP serial driver to work correctly on OMAP4 when booting
with DT.
* tag 'omap-fixes-a-for-3.10-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/pjw/omap-pending:
ARM: OMAP2+: hwmod: Remove sysc slave idle and auto idle apis
SERIAL: OMAP: Remove the slave idle handling from the driver
ARM: OMAP2+: serial: Remove the un-used slave idle hooks
ARM: OMAP2+: hwmod-data: UART IP needs software control to manage sidle modes
ARM: OMAP2+: hwmod: Add a new flag to handle SIDLE in SWSUP only in active
ARM: OMAP2+: hwmod: Fix sidle programming in _enable_sysc()/_idle_sysc()
Signed-off-by: Olof Johansson <olof@lixom.net>
As suggested by David Howells <dhowells@redhat.com>, use
asm-generic/param.h and uapi/asm-generic/param.h for AVR32.
It also fixes building warnings caused by redefinitions of HZ:
In file included from /ws/linux/kernel/linux.git/include/uapi/linux/param.h:4,
from include/linux/timex.h:63,
from include/linux/jiffies.h:8,
from include/linux/ktime.h:25,
from include/linux/timer.h:5,
from include/linux/workqueue.h:8,
from include/linux/srcu.h:34,
from include/linux/notifier.h:15,
from include/linux/memory_hotplug.h:6,
from include/linux/mmzone.h:777,
from include/linux/gfp.h:4,
from arch/avr32/mm/init.c:10:
/ws/linux/kernel/linux.git/arch/avr32/include/asm/param.h:6:1: warning: "HZ" redefined
In file included from /ws/linux/kernel/linux.git/arch/avr32/include/asm/param.h:4,
from /ws/linux/kernel/linux.git/include/uapi/linux/param.h:4,
from include/linux/timex.h:63,
from include/linux/jiffies.h:8,
from include/linux/ktime.h:25,
from include/linux/timer.h:5,
from include/linux/workqueue.h:8,
from include/linux/srcu.h:34,
from include/linux/notifier.h:15,
from include/linux/memory_hotplug.h:6,
from include/linux/mmzone.h:777,
from include/linux/gfp.h:4,
from arch/avr32/mm/init.c:10:
/ws/linux/kernel/linux.git/arch/avr32/include/uapi/asm/param.h:6:1: warning: this is the location of the previous definition
Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>
As a relatively new ABI, N64 only had getdents syscall while other modern
architectures have getdents64.
This was noticed when Python 3.3 shifted to the latter one for aarch64.
[ralf@linux-mips.org: The history of getdents64 is a little complicated.
Commit 1a1d77dd589de5a567fa95e36aa6999c704ceca4 [Merge with 2.4.0-test7.]
added N64 getdents(2) to arch/mips64/kernel/scall_64.S as syscall 5213,
then dropped again in 578720675c44e54e8aa7c68f6dce59ed37ce3d3b [Overhaul
of the 64-bit syscall interface. Now heritage free.] for 2.5.18 in 2002.]
Signed-off-by: Aron Xu <aron@debian.org>
Acked-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5285/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
- As suggested by Gleb, wrap calls to gfn_to_pfn() with srcu_read_lock/unlock().
Memory slots should be acccessed from a SRCU read section.
- kvm_mips_map_page() now returns an error code to it's callers, instead of
calling panic() if it cannot find a mapping for a particular gfn.
Signed-off-by: Sanjay Lal <sanjayl@kymasys.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
This patch updates the marzen board code as if USB PHY isn't enabled
they phy will have a value set by ERR_PTR() rather than be NULL.
Without this patch a NULL pointer dereference and kernel panic
occurs on initialisation of USB on marzen.
This resolves a regression introduced in 3.10-rc1 by
b7fa5c2aec
("usb: phy: return -ENXIO when PHY layer isn't enabled").
Tested-by: Nguyen Hong Ky <nh-ky@jinso.co.jp>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
local_irq_enable() may expand into very different code, so it rather should
stay in C. Also this keeps the assembler code size constant which keeps
the rollback code simple. So it's best to split r4k_wait into two parts,
one C and one assembler.
Finally add the local_irq_enable() to r4k_wait to ensure the WAIT
instruction in __r4k_wait() will work properly.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Linus Torvalds
Kyle McMartin
Vineet Gupta
Olof Johansson
Helge Deller
John David Anglin
Josh Wu
Boris BREZILLON
Jean-Christophe PLAGNIOL-VILLARD
Brian King
Benjamin Herrenschmidt
Michael Ellerman
Will Deacon
Steven Capper
Ard Biesheuvel
Jiang Liu
Aron Xu
Masami Hiramatsu
Sanjay Lal
Simon Horman
Ralf Baechle