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Ben Tebulin reported:
"Since v3.7.2 on two independent machines a very specific Git
repository fails in 9/10 cases on git-fsck due to an SHA1/memory
failures. This only occurs on a very specific repository and can be
reproduced stably on two independent laptops. Git mailing list ran
out of ideas and for me this looks like some very exotic kernel issue"
and bisected the failure to the backport of commit 53a59fc67f97 ("mm:
limit mmu_gather batching to fix soft lockups on !CONFIG_PREEMPT").
That commit itself is not actually buggy, but what it does is to make it
much more likely to hit the partial TLB invalidation case, since it
introduces a new case in tlb_next_batch() that previously only ever
happened when running out of memory.
The real bug is that the TLB gather virtual memory range setup is subtly
buggered. It was introduced in commit 597e1c3580b7 ("mm/mmu_gather:
enable tlb flush range in generic mmu_gather"), and the range handling
was already fixed at least once in commit e6c495a96ce0 ("mm: fix the TLB
range flushed when __tlb_remove_page() runs out of slots"), but that fix
was not complete.
The problem with the TLB gather virtual address range is that it isn't
set up by the initial tlb_gather_mmu() initialization (which didn't get
the TLB range information), but it is set up ad-hoc later by the
functions that actually flush the TLB. And so any such case that forgot
to update the TLB range entries would potentially miss TLB invalidates.
Rather than try to figure out exactly which particular ad-hoc range
setup was missing (I personally suspect it's the hugetlb case in
zap_huge_pmd(), which didn't have the same logic as zap_pte_range()
did), this patch just gets rid of the problem at the source: make the
TLB range information available to tlb_gather_mmu(), and initialize it
when initializing all the other tlb gather fields.
This makes the patch larger, but conceptually much simpler. And the end
result is much more understandable; even if you want to play games with
partial ranges when invalidating the TLB contents in chunks, now the
range information is always there, and anybody who doesn't want to
bother with it won't introduce subtle bugs.
Ben verified that this fixes his problem.
Reported-bisected-and-tested-by: Ben Tebulin <tebulin@googlemail.com>
Build-testing-by: Stephen Rothwell <sfr@canb.auug.org.au>
Build-testing-by: Richard Weinberger <richard.weinberger@gmail.com>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Merge a bunch of fixes from Andrew Morton.
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
fs/proc/task_mmu.c: fix buffer overflow in add_page_map()
arch: *: Kconfig: add "kernel/Kconfig.freezer" to "arch/*/Kconfig"
ocfs2: fix null pointer dereference in ocfs2_dir_foreach_blk_id()
x86 get_unmapped_area(): use proper mmap base for bottom-up direction
ocfs2: fix NULL pointer dereference in ocfs2_duplicate_clusters_by_page
ocfs2: Revert 40bd62e to avoid regression in extended allocation
drivers/rtc/rtc-stmp3xxx.c: provide timeout for potentially endless loop polling a HW bit
hugetlb: fix lockdep splat caused by pmd sharing
aoe: adjust ref of head for compound page tails
microblaze: fix clone syscall
mm: save soft-dirty bits on file pages
mm: save soft-dirty bits on swapped pages
memcg: don't initialize kmem-cache destroying work for root caches
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All architectures include "kernel/Kconfig.freezer" except three left, so
let them include it too, or 'allmodconfig' will report error.
The related errors: (with allmodconfig for openrisc):
CC kernel/cgroup_freezer.o
kernel/cgroup_freezer.c: In function 'freezer_css_online':
kernel/cgroup_freezer.c:133:15: error: 'system_freezing_cnt' undeclared (first use in this function)
kernel/cgroup_freezer.c:133:15: note: each undeclared identifier is reported only once for each function it appears in
kernel/cgroup_freezer.c: In function 'freezer_css_offline':
kernel/cgroup_freezer.c:157:15: error: 'system_freezing_cnt' undeclared (first use in this function)
kernel/cgroup_freezer.c: In function 'freezer_attach':
kernel/cgroup_freezer.c:200:4: error: implicit declaration of function 'freeze_task'
kernel/cgroup_freezer.c: In function 'freezer_apply_state':
kernel/cgroup_freezer.c:371:16: error: 'system_freezing_cnt' undeclared (first use in this function)
Signed-off-by: Chen Gang <gang.chen@asianux.com>
Cc: Richard Kuo <rkuo@codeaurora.org>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: Chen Liqin <liqin.chen@sunplusct.com>
Cc: Lennox Wu <lennox.wu@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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When the stack is set to unlimited, the bottomup direction is used for
mmap-ings but the mmap_base is not used and thus effectively renders
ASLR for mmapings along with PIE useless.
Cc: Michel Lespinasse <walken@google.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Cc: Adrian Sendroiu <molecula2788@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Fix inadvertent breakage in the clone syscall ABI for Microblaze that
was introduced in commit f3268edbe6fe ("microblaze: switch to generic
fork/vfork/clone").
The Microblaze syscall ABI for clone takes the parent tid address in the
4th argument; the third argument slot is used for the stack size. The
incorrectly-used CLONE_BACKWARDS type assigned parent tid to the 3rd
slot.
This commit restores the original ABI so that existing userspace libc
code will work correctly.
All kernel versions from v3.8-rc1 were affected.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Andy reported that if file page get reclaimed we lose the soft-dirty bit
if it was there, so save _PAGE_BIT_SOFT_DIRTY bit when page address get
encoded into pte entry. Thus when #pf happens on such non-present pte
we can restore it back.
Reported-by: Andy Lutomirski <luto@amacapital.net>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Acked-by: Pavel Emelyanov <xemul@parallels.com>
Cc: Matt Mackall <mpm@selenic.com>
Cc: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@gmail.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Andy Lutomirski reported that if a page with _PAGE_SOFT_DIRTY bit set
get swapped out, the bit is getting lost and no longer available when
pte read back.
To resolve this we introduce _PTE_SWP_SOFT_DIRTY bit which is saved in
pte entry for the page being swapped out. When such page is to be read
back from a swap cache we check for bit presence and if it's there we
clear it and restore the former _PAGE_SOFT_DIRTY bit back.
One of the problem was to find a place in pte entry where we can save
the _PTE_SWP_SOFT_DIRTY bit while page is in swap. The _PAGE_PSE was
chosen for that, it doesn't intersect with swap entry format stored in
pte.
Reported-by: Andy Lutomirski <luto@amacapital.net>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Acked-by: Pavel Emelyanov <xemul@parallels.com>
Cc: Matt Mackall <mpm@selenic.com>
Cc: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@gmail.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Reviewed-by: Minchan Kim <minchan@kernel.org>
Reviewed-by: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Pull perf fixes from Ingo Molnar:
"Two small fixlets"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/x86: Add Haswell ULT model number used in Macbook Air and other systems
perf/x86: Fix intel QPI uncore event definitions
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Fix constraint check in armpmu_map_hw_event().
Reported-and-tested-by: Vince Weaver <vincent.weaver@maine.edu>
Cc: <stable@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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This is only theoretical, but after try_to_wake_up(p) was changed
to check p->state under p->pi_lock the code like
__set_current_state(TASK_INTERRUPTIBLE);
schedule();
can miss a signal. This is the special case of wait-for-condition,
it relies on try_to_wake_up/schedule interaction and thus it does
not need mb() between __set_current_state() and if(signal_pending).
However, this __set_current_state() can move into the critical
section protected by rq->lock, now that try_to_wake_up() takes
another lock we need to ensure that it can't be reordered with
"if (signal_pending(current))" check inside that section.
The patch is actually one-liner, it simply adds smp_wmb() before
spin_lock_irq(rq->lock). This is what try_to_wake_up() already
does by the same reason.
We turn this wmb() into the new helper, smp_mb__before_spinlock(),
for better documentation and to allow the architectures to change
the default implementation.
While at it, kill smp_mb__after_lock(), it has no callers.
Perhaps we can also add smp_mb__before/after_spinunlock() for
prepare_to_wait().
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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This one was missed earlier.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1376007983-31616-1-git-send-email-andi@firstfloor.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Pull powerpc fixes from Ben Herrenschmidt:
"This includes small series from Michael Neuling to fix a couple of
nasty remaining problems with the new Power8 support, also targeted at
stable 3.10, without which some new userspace accessible registers
aren't properly context switched, and in some case, can be clobbered
by the user of transactional memory.
Along with that, a few slightly more minor things, such as a missing
Kconfig option to enable handling of denorm exceptions when not
running under a hypervisor (or userspace will randomly crash when
hitting denorms with the vector unit), some nasty bugs in the new
pstore oops code, and other simple bug fixes worth having in now.
Note: I picked up the two powerpc KVM fixes as Alex Graf asked me to
handle KVM bits while he is on vacation. However I'll let him decide
whether they should go to -stable or not when he is back"
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
powerpc/tm: Fix context switching TAR, PPR and DSCR SPRs
powerpc: Save the TAR register earlier
powerpc: Fix context switch DSCR on POWER8
powerpc: Rework setting up H/FSCR bit definitions
powerpc: Fix hypervisor facility unavaliable vector number
powerpc/kvm/book3s_pr: Return appropriate error when allocation fails
powerpc/kvm: Add signed type cast for comparation
powerpc/eeh: Add missing procfs entry for PowerNV
powerpc/pseries: Add backward compatibilty to read old kernel oops-log
powerpc/pseries: Fix buffer overflow when reading from pstore
powerpc: On POWERNV enable PPC_DENORMALISATION by default
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Pull s390 kvm fixes from Paolo Bonzini:
"Two fixes for s390"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: s390: fix pfmf non-quiescing control handling
KVM: s390: move kvm_guest_enter,exit closer to sie
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Pull fbdev fixes from Tomi Valkeinen:
- omapdss: compilation fix and DVI fix for PandaBoard
- mxsfb: fix colors when using 18bit LCD bus
* tag 'fbdev-fixes-3.11-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux:
ARM: OMAP: dss-common: fix Panda's DVI DDC channel
video: mxsfb: fix color settings for 18bit data bus and 32bpp
OMAPDSS: analog-tv-connector: compile fix
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If a transaction is rolled back, the Target Address Register (TAR), Processor
Priority Register (PPR) and Data Stream Control Register (DSCR) should be
restored to the checkpointed values before the transaction began. Any changes
to these SPRs inside the transaction should not be visible in the abort
handler.
Currently Linux doesn't save or restore the checkpointed TAR, PPR or DSCR. If
we preempt a processes inside a transaction which has modified any of these, on
process restore, that same transaction may be aborted we but we won't see the
checkpointed versions of these SPRs.
This adds checkpointed versions of these SPRs to the thread_struct and adds the
save/restore of these three SPRs to the treclaim/trechkpt code.
Without this if any of these SPRs are modified during a transaction, users may
incorrectly see a speculated SPR value even if the transaction is aborted.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Cc: <stable@vger.kernel.org> [v3.10]
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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This moves us to save the Target Address Register (TAR) a earlier in
__switch_to. It introduces a new function save_tar() to do this.
We need to save the TAR earlier as we will overwrite it in the transactional
memory reclaim/recheckpoint path. We are going to do this in a subsequent
patch which will fix saving the TAR register when it's modified inside a
transaction.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Cc: <stable@vger.kernel.org> [v3.10]
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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POWER8 allows the DSCR to be accessed directly from userspace via a new SPR
number 0x3 (Rather than 0x11. DSCR SPR number 0x11 is still used on POWER8 but
like POWER7, is only accessible in HV and OS modes). Currently, we allow this
by setting H/FSCR DSCR bit on boot.
Unfortunately this doesn't work, as the kernel needs to see the DSCR change so
that it knows to no longer restore the system wide version of DSCR on context
switch (ie. to set thread.dscr_inherit).
This clears the H/FSCR DSCR bit initially. If a process then accesses the DSCR
(via SPR 0x3), it'll trap into the kernel where we set thread.dscr_inherit in
facility_unavailable_exception().
We also change _switch() so that we set or clear the H/FSCR DSCR bit based on
the thread.dscr_inherit.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Cc: <stable@vger.kernel.org> [v3.10]
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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This reworks the Facility Status and Control Regsiter (FSCR) config bit
definitions so that we can access the bit numbers. This is needed for a
subsequent patch to fix the userspace DSCR handling.
HFSCR and FSCR bit definitions are the same, so reuse them.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Cc: <stable@vger.kernel.org> [v3.10]
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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Currently if we take hypervisor facility unavaliable (from 0xf80/0x4f80) we
mark it as an OS facility unavaliable (0xf60) as the two share the same code
path.
The becomes a problem in facility_unavailable_exception() as we aren't able to
see the hypervisor facility unavailable exceptions.
Below fixes this by duplication the required macros.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Cc: <stable@vger.kernel.org> [v3.10]
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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err was overwritten by a previous function call, and checked to be 0. If
the following page allocation fails, 0 is going to be returned instead
of -ENOMEM.
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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'rmls' is 'unsigned long', lpcr_rmls() will return negative number when
failure occurs, so it need a type cast for comparing.
'lpid' is 'unsigned long', kvmppc_alloc_lpid() return negative number
when failure occurs, so it need a type cast for comparing.
Signed-off-by: Chen Gang <gang.chen@asianux.com>
Acked-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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The procfs entry for global statistics has been missed on PowerNV
platform and the patch is going to add that.
Signed-off-by: Mike Qiu <qiudayu@linux.vnet.ibm.com>
Acked-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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Older kernels has just length information in their header. Handle it
while reading old kernel oops log from pstore.
Applies on top of powerpc/pseries: Fix buffer overflow when reading from pstore
Signed-off-by: Aruna Balakrishnaiah <aruna@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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When reading from pstore there is a buffer overflow during decompression
due to the header added in unzip_oops. Remove unzip_oops and call
pstore_decompress directly in nvram_pstore_read. Allocate buffer of size
report_length of the oops header as header will not be deallocated in pstore.
Since we have 'openssl' command line tool to decompress the compressed data,
dump the compressed data in case decompression fails instead of not dumping
anything.
Signed-off-by: Aruna Balakrishnaiah <aruna@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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We want PPC_DENORMALISATION enabled when POWERNV is enabled,
so update the Kconfig.
Signed-off-by: Anton Blanchard <anton@samba.org>
Acked-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: <stable@vger.kernel.org>
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Pull AVR32 build fix from Hans-Christian Egtvedt.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/egtvedt/linux-avr32:
avr32: boards/atngw100/mrmt.c: fix building error
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Pull ARM SoC fixes from Kevin Hilman:
- MSM: GPIO fixes (includes old code removal)
- OMAP: earlyprintk regression, AM33xx cpgmac PM regression
- OMAP5: urgent fix for potentially harmful voltage regulator values
- Renesas: gpio-keys fix, fix SD card detection, fix shdma calculation
error
- STi: critical SMP boot fix
- tegra: DTS fix for usb-phy
- a couple MAINTAINERS updates
(Arnd is on paternity leave, Kevin is stepping up to help arm-soc
maintenance)
* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
MAINTAINERS: add TI Keystone ARM platform
MAINTAINERS: delete Srinidhi from ux500
ARM: tegra: enable ULPI phy on Colibri T20
ARM: STi: remove sti_secondary_start from INIT section.
ARM: STi: Fix cpu nodes with correct device_type.
ARM: shmobile: lager: do not annotate gpio_buttons as __initdata
ARM: shmobile: BOCK-W: fix SDHI0 PFC settings
shdma: fixup sh_dmae_get_partial() calculation error
ARM: OMAP2+: hwmod: AM335x: fix cpgmac address space
ARM: OMAP2+: hwmod: rt address space index for DT
ARM: OMAP2+: Sync hwmod state with the pm_runtime and omap_device state
ARM: OMAP2+: Avoid idling memory controllers with no drivers
ARM: OMAP2+: hwmod: Fix a crash in _setup_reset() with DEBUG_LL
ARM: dts: omap5-uevm: update optional/unused regulator configurations
ARM: dts: omap5-uevm: fix regulator configurations mandatory for SoC
ARM: dts: omap5-uevm: document regulator signals used on the actual board
ARM: msm: Consolidate gpiomux for older architectures
ARM: shmobile: armadillo800eva: Don't request GPIO 166 in board code
ARM: msm: dts: Fix the gpio register address for msm8960
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there is an additional "{", which causes building error.
Signed-off-by: Cong Ding <dinggnu@gmail.com>
Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>
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Pull misc x86 fixes from Peter Anvin.
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86, amd, microcode: Fix error path in apply_microcode_amd()
x86, fpu: correct the asm constraints for fxsave, unbreak mxcsr.daz
x86, efi: correct call to free_pages
x86/iommu/vt-d: Expand interrupt remapping quirk to cover x58 chipset
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Pull MIPS fixes from Ralf Baechle:
"Two platform-specific fixes plus a fix for oprofile which was calling
smp_processor_id() in preemptible code"
* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
MIPS: BMIPS: fix hardware interrupt routing for boot CPU != 0
MIPS: oprofile: Fix BUG due to smp_processor_id() in preemptible code.
MIPS: PNX833x: PNX8335_PCI_ETHERNET_INT depends on CONFIG_SOC_PNX8335
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Pull s390 fixes from Martin Schwidefsky:
"Enable LZ4 compression for the kernel image, add the machine id for
the new zBC12 model, fix an issue with hanging dasd devices, correct a
Kconfig dependency, fix a compile error in the perf module with
CONFIG_KVM=n and fix the find_next_bit_left primitive for the PCI base
layer"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390/dasd: fix hanging devices after path events
s390/perf: fix compile error (undefined reference sie_exit)
s390/bitops: fix find_next_bit_left
s390: add support for IBM zBC12 machine
s390/Kconfig: select 'TTY' when 'S390_GUEST' is enabled
s390: add support for LZ4-compressed kernel
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The hardware interrupt routing for boot CPU != 0 is wrong because it
will route all the hardware interrupts to TP0 which is not the one we
booted from. Fix this by properly checking which boot CPU we are booting
from and updating the right interrupt mask for the boot CPU. This fixes
booting on BCM3368 with bmips_smp_emabled = 0.
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Cc: linux-mips@linux-mips.org
Cc: blogic@openwrt.org
Cc: jogo@openwrt.org
Cc: cernekee@gmail.com
Patchwork: https://patchwork.linux-mips.org/patch/5650/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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current_cpu_type() is not preemption-safe.
If CONFIG_PREEMPT is enabled then mipsxx_reg_setup() can be called from preemptible state.
Added get_cpu()/put_cpu() pair to make it preemption-safe.
This was found while testing oprofile with CONFIG_DEBUG_PREEMPT enable.
/usr/zntestsuite # opcontrol --init
/usr/zntestsuite # opcontrol --setup --event=L2_CACHE_ACCESSES:500 --event=L2_CACHE_MISSES:500 --no-vmlinux
/usr/zntestsuite # opcontrol --start
Using 2.6+ OProfile kernel interface.
BUG: using smp_processor_id() in preemptible [00000000] code: oprofiled/1362
caller is mipsxx_reg_setup+0x11c/0x164
CPU: 0 PID: 1362 Comm: oprofiled Not tainted 3.10.4 #18
Stack : 00000006 70757465 00000000 00000000 00000000 00000000 80b173f6 00000037
80b10000 00000000 80b21614 88f5a220 00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
00000000 00000000 00000000 89c49c00 89c49c2c 80721254 807b7927 8012c1d0
80b10000 80721254 00000000 00000552 88f5a220 80b1335c 807b78e6 89c49ba8
...
Call Trace:
[<801099a4>] show_stack+0x64/0x7c
[<80665520>] dump_stack+0x20/0x2c
[<803a2250>] debug_smp_processor_id+0xe0/0xf0
[<8052df24>] mipsxx_reg_setup+0x11c/0x164
[<8052cd70>] op_mips_setup+0x24/0x4c
[<80529cfc>] oprofile_setup+0x5c/0x12c
[<8052b9f8>] event_buffer_open+0x78/0xf8
[<801c3150>] do_dentry_open.isra.15+0x2b8/0x3b0
[<801c3270>] finish_open+0x28/0x4c
[<801d49b8>] do_last.isra.41+0x2cc/0xd00
[<801d54a0>] path_openat+0xb4/0x4c4
[<801d5c44>] do_filp_open+0x3c/0xac
[<801c4744>] do_sys_open+0x110/0x1f4
[<8010f47c>] stack_done+0x20/0x44
Bug reported and original patch by Jerin Jacob <jerinjacobk@gmail.com>.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Acked-by: Jerin Jacob <jerinjacobk@gmail.com>
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The PNX8335_PCI_ETHERNET_INT macro is defined in
arch/mips/include/asm/mach-pnx833x/irq-mapping.h
only if CONFIG_SOC_PNX8335 is selected.
Fixes the following randconfig problem:
arch/mips/pnx833x/common/platform.c:210:12:
error: 'PNX8335_PIC_ETHERNET_INT' undeclared here
(not in a function)
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Acked-by: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5585/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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John McCalpin reports that the "drs_data" and "ncb_data" QPI
uncore events are missing the "extra bit" and always return zero
values unless the bit is properly set.
More details from him:
According to the Xeon E5-2600 Product Family Uncore Performance
Monitoring Guide, Table 2-94, about 1/2 of the QPI Link Layer events
(including the ones that "perf" calls "drs_data" and "ncb_data") require
that the "extra bit" be set.
This was confusing for a while -- a note at the bottom of page 94 says
that the "extra bit" is bit 16 of the control register.
Unfortunately, Table 2-86 clearly says that bit 16 is reserved and must
be zero. Looking around a bit, I found that bit 21 appears to be the
correct "extra bit", and further investigation shows that "perf" actually
agrees with me:
[root@c560-003.stampede]# cat /sys/bus/event_source/devices/uncore_qpi_0/format/event
config:0-7,21
So the command
# perf -e "uncore_qpi_0/event=drs_data/"
Is the same as
# perf -e "uncore_qpi_0/event=0x02,umask=0x08/"
While it should be
# perf -e "uncore_qpi_0/event=0x102,umask=0x08/"
I confirmed that this last version gives results that agree with the
amount of data that I expected the STREAM benchmark to move across the QPI
link in the second (cross-chip) test of the original script.
Reported-by: John McCalpin <mccalpin@tacc.utexas.edu>
Signed-off-by: Vince Weaver <vincent.weaver@maine.edu>
Cc: zheng.z.yan@intel.com
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: Paul Mackerras <paulus@samba.org>
Cc: <stable@kernel.org>
Link: http://lkml.kernel.org/r/alpine.DEB.2.10.1308021037280.26119@vincent-weaver-1.um.maine.edu
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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This was missed when splitting out the phy from the controller node in
commit 9dffe3be3f32 (ARM: tegra: modify ULPI reset GPIO properties).
Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
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This patch removes sti_secondary_start from _INIT section, there are 2
reason for this removal.
1. discarding such a small code does not save much, given the RAM
sizes.
2. Having this code discarded, creates corruption issue when we boot
smp-kernel with nrcpus=1 or with single cpu node in DT.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
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This patch fixes cpu nodes with device_type = "cpu". This change was not
necessary before 3.10-rc7.
Without this patch STi SOCs does not boot as SMP.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
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From Simon Horman:
Second round of Renesas ARM based SoC fixes for v3.11
* Lager board: do not annotate gpio_buttons as __initdata
- This avoids accessing uninitialised memory if keys are pressed
after kernel initialisation completes.
- Bug introduced in gpio-keys were enabled in v3.11-rc1
* Bock-W board: fix SDHI0 PFC settings
- Allow detection of SD card
- Bug introduced in SDHI support was added in v3.11-rc1
* shdma: fixup sh_dmae_get_partial() calculation error
- Bug introduced in 2.6.34-rc1.
* armadillo800eva board: Don't request GPIO 166 in board code
- Allow use of touchscreen
- Bug introduced in v3.11-rc1
* tag 'renesas-fixes2-for-v3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
ARM: shmobile: lager: do not annotate gpio_buttons as __initdata
ARM: shmobile: BOCK-W: fix SDHI0 PFC settings
shdma: fixup sh_dmae_get_partial() calculation error
ARM: shmobile: armadillo800eva: Don't request GPIO 166 in board code
Signed-off-by: Olof Johansson <olof@lixom.net>
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From Paul Walmsley via Tony Lindgren:
Some OMAP hwmod fixes for v3.11-rc. Mostly intended to fix an earlyprintk
regression and an AM33xx cpgmac power management regression.
Basic build, boot, and PM tests are available here:
http://www.pwsan.com/omap/testlogs/hwmod_fixes_a_v3.11-rc/20130730042132/
The tests include temporary fixes for the unrelated 2430SDP and OMAP3
boot regressions, which are not part of this signed tag.
* tag 'for-v3.11-rc/omap-fixes-b' of git://git.kernel.org/pub/scm/linux/kernel/git/pjw/omap-pending:
ARM: OMAP2+: hwmod: AM335x: fix cpgmac address space
ARM: OMAP2+: hwmod: rt address space index for DT
ARM: OMAP2+: Sync hwmod state with the pm_runtime and omap_device state
ARM: OMAP2+: Avoid idling memory controllers with no drivers
ARM: OMAP2+: hwmod: Fix a crash in _setup_reset() with DEBUG_LL
Signed-off-by: Olof Johansson <olof@lixom.net>
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From Tony Lindgren:
Fixes for omap5-uevm regulators from Nishanth Menon <nm@ti.com>:
Due to wrong older revision of documentation used as reference, we
seem to have a bunch of LDOs wrongly configured on OMAP5 uEVM. This
series is based power tree on production board 750-2628-XXX platform.
Unfortunately, the wrong voltages may be detrimental to OMAP5 as they
supply hardware blocks at voltages that are out of specification.
There is a chance that without these fixes there can be hardware
damage to omap5-uevm boards with the v3.11-rc series.
* tag 'omap-for-v3.11/fixes-omap5' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
ARM: dts: omap5-uevm: update optional/unused regulator configurations
ARM: dts: omap5-uevm: fix regulator configurations mandatory for SoC
ARM: dts: omap5-uevm: document regulator signals used on the actual board
Signed-off-by: Olof Johansson <olof@lixom.net>
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From David Brown, fixes for MSM for 3.11:
Two small fixes for MSM.
The first fixes the a gpio controller register address. I didn't see
any acks from the devicetree maintainers, so I've copied them on this
pull request. The change itself is minor, and just to the register
address.
The second change removes the gpiomux V1 code from MSM. This was
breaking compilation for some of the targets.
* tag 'msm-3.11-fix1' of git://git.kernel.org/pub/scm/linux/kernel/git/davidb/linux-msm:
ARM: msm: Consolidate gpiomux for older architectures
ARM: msm: dts: Fix the gpio register address for msm8960
Signed-off-by: Olof Johansson <olof@lixom.net>
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Merge net into net-next to setup some infrastructure Eric
Dumazet needs for usbnet changes.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pull arm fixes fixes from Russell King:
"This fixes a couple of problems with commit 48be69a026b2 ("ARM: move
signal handlers into a vdso-like page"), one of which was originally
discovered via my testing originally, but the fix for it was never
actually committed.
The other shows up on noMMU builds, and such platforms are extremely
rare and as such are not part of my nightly testing"
* 'fixes' of git://git.linaro.org/people/rmk/linux-arm:
ARM: fix nommu builds with 48be69a02 (ARM: move signal handlers into a vdso-like page)
ARM: fix a cockup in 48be69a02 (ARM: move signal handlers into a vdso-like page)
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Olof reports that noMMU builds error out with:
arch/arm/kernel/signal.c: In function 'setup_return':
arch/arm/kernel/signal.c:413:25: error: 'mm_context_t' has no member named 'sigpage'
This shows one of the evilnesses of IS_ENABLED(). Get rid of it here
and replace it with #ifdef's - and as no noMMU platform can make use
of sigpage, depend on CONIFG_MMU not CONFIG_ARM_MPU.
Reported-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Unfortunately, I never committed the fix to a nasty oops which can
occur as a result of that commit:
------------[ cut here ]------------
kernel BUG at /home/olof/work/batch/include/linux/mm.h:414!
Internal error: Oops - BUG: 0 [#1] PREEMPT SMP ARM
Modules linked in:
CPU: 0 PID: 490 Comm: killall5 Not tainted 3.11.0-rc3-00288-gabe0308 #53
task: e90acac0 ti: e9be8000 task.ti: e9be8000
PC is at special_mapping_fault+0xa4/0xc4
LR is at __do_fault+0x68/0x48c
This doesn't show up unless you do quite a bit of testing; a simple
boot test does not do this, so all my nightly tests were passing fine.
The reason for this is that install_special_mapping() expects the
page array to stick around, and as this was only inserting one page
which was stored on the kernel stack, that's why this was blowing up.
Reported-by: Olof Johansson <olof@lixom.net>
Tested-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Pull powerpc fixes from Ben Herrenschmidt:
"Here is not quite a handful of powerpc fixes for rc3.
The windfarm fix is a regression fix (though not a new one), the PMU
interrupt rename is not a fix per-se but has been submitted a long
time ago and I kept forgetting to put it in (it puts us back in sync
with x86), the other perf bit is just about putting an API/ABI bit
definition in the right place for userspace to consume, and finally,
we have a fix for the VPHN (Virtual Partition Home Node) feature
(notification that the hypervisor is moving nodes around) which could
cause lockups so we may as well fix it now"
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
powerpc/windfarm: Fix noisy slots-fan on Xserve (rm31)
powerpc: VPHN topology change updates all siblings
powerpc/perf: Export PERF_EVENT_CONFIG_EBB_SHIFT to userspace
powerpc: Rename PMU interrupts from CNT to PMI
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Pull ARM fixes from Russell King:
"I've thought long and hard about what to say for this pull request,
and I really can't work out anything sane to say to summarise much of
these commits. The problem is, for most of these are, yet again, lots
of small bits scattered around the place without any real overall
theme to them"
Most notable is probably the kuser page helper improvements.
* 'fixes' of git://git.linaro.org/people/rmk/linux-arm: (22 commits)
ARM: Add .text annotations where required after __CPUINIT removal
ARM: 7803/1: Fix deadlock scenario with smp_send_stop()
ARM: make vectors page inaccessible from userspace
ARM: move signal handlers into a vdso-like page
ARM: allow kuser helpers to be removed from the vector page
ARM: update FIQ support for relocation of vectors
ARM: use linker magic for vectors and vector stubs
ARM: move vector stubs
ARM: poison memory between kuser helpers
ARM: poison the vectors page
ARM: 7801/1: v6: prevent gcc 4.5 from reordering extended CP15 reads above is_smp() test
ARM: 7800/1: ARMv7-M: Fix name of NVIC handler function
ARM: Fix sorting of machine- initializers
ARM: 7791/1: a.out: remove partial a.out support
ARM: 7790/1: Fix deferred mm switch on VIVT processors
ARM: 7789/1: Do not run dummy_flush_tlb_a15_erratum() on non-Cortex-A15
ARM: 7787/1: virt: ensure visibility of __boot_cpu_mode
ARM: 7788/1: elf: fix lpae hwcap feature reporting in proc/cpuinfo
ARM: 7786/1: hyp: fix macro parameterisation
ARM: 7785/1: mm: restrict early_alloc to section-aligned memory
...
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David S. Miller
Linus Torvalds
Chen Gang
Radu Caragea
Michal Simek
Cyrill Gorcunov
Stephen Boyd
Oleg Nesterov
Andi Kleen
Michael Neuling
Thadeu Lima de Souza Cascardo
Mike Qiu
Aruna Balakrishnaiah
Anton Blanchard
Cong Ding
Florian Fainelli
Ralf Baechle
Markos Chandras
Vince Weaver
Lucas Stach
Srinivas Kandagatla
Olof Johansson
Russell King