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71766 Commits

Author SHA1 Message Date
Mark Rutland 2fde4f94e0 perf: Decouple unthrottling and rotating
Currently the adjusments made as part of perf_event_task_tick() use the
percpu rotation lists to iterate over any active PMU contexts, but these
are not used by the context rotation code, having been replaced by
separate (per-context) hrtimer callbacks. However, some manipulation of
the rotation lists (i.e. removal of contexts) has remained in
perf_rotate_context(). This leads to the following issues:

* Contexts are not always removed from the rotation lists. Removal of
  PMUs which have been placed in rotation lists, but have not been
  removed by a hrtimer callback can result in corruption of the rotation
  lists (when memory backing the context is freed).

  This has been observed to result in hangs when PMU drivers built as
  modules are inserted and removed around the creation of events for
  said PMUs.

* Contexts which do not require rotation may be removed from the
  rotation lists as a result of a hrtimer, and will not be considered by
  the unthrottling code in perf_event_task_tick.

This patch fixes the issue by updating the rotation ist when events are
scheduled in/out, ensuring that each rotation list stays in sync with
the HW state. As each event holds a refcount on the module of its PMU,
this ensures that when a PMU module is unloaded none of its CPU contexts
can be in a rotation list. By maintaining a list of perf_event_contexts
rather than perf_event_cpu_contexts, we don't need separate paths to
handle the cpu and task contexts, which also makes the code a little
simpler.

As the rotation_list variables are not used for rotation, these are
renamed to active_ctx_list, which better matches their current function.
perf_pmu_rotate_{start,stop} are renamed to
perf_pmu_ctx_{activate,deactivate}.

Reported-by: Johannes Jensen <johannes.jensen@arm.com>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Will Deacon <Will.Deacon@arm.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Fengguang Wu <fengguang.wu@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/20150129134511.GR17721@leverpostej
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-02-04 08:07:16 +01:00
Ingo Molnar 8f4bf4bcc4 Linux 3.19-rc7
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Merge tag 'v3.19-rc7' into perf/core, to merge fixes before applying new changes

Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-02-04 07:58:29 +01:00
Linus Torvalds 00845eb968 sched: don't cause task state changes in nested sleep debugging
Commit 8eb23b9f35 ("sched: Debug nested sleeps") added code to report
on nested sleep conditions, which we generally want to avoid because the
inner sleeping operation can re-set the thread state to TASK_RUNNING,
but that will then cause the outer sleep loop not actually sleep when it
calls schedule.

However, that's actually valid traditional behavior, with the inner
sleep being some fairly rare case (like taking a sleeping lock that
normally doesn't actually need to sleep).

And the debug code would actually change the state of the task to
TASK_RUNNING internally, which makes that kind of traditional and
working code not work at all, because now the nested sleep doesn't just
sometimes cause the outer one to not block, but will cause it to happen
every time.

In particular, it will cause the cardbus kernel daemon (pccardd) to
basically busy-loop doing scheduling, converting a laptop into a heater,
as reported by Bruno Prémont.  But there may be other legacy uses of
that nested sleep model in other drivers that are also likely to never
get converted to the new model.

This fixes both cases:

 - don't set TASK_RUNNING when the nested condition happens (note: even
   if WARN_ONCE() only _warns_ once, the return value isn't whether the
   warning happened, but whether the condition for the warning was true.
   So despite the warning only happening once, the "if (WARN_ON(..))"
   would trigger for every nested sleep.

 - in the cases where we knowingly disable the warning by using
   "sched_annotate_sleep()", don't change the task state (that is used
   for all core scheduling decisions), instead use '->task_state_change'
   that is used for the debugging decision itself.

(Credit for the second part of the fix goes to Oleg Nesterov: "Can't we
avoid this subtle change in behaviour DEBUG_ATOMIC_SLEEP adds?" with the
suggested change to use 'task_state_change' as part of the test)

Reported-and-bisected-by: Bruno Prémont <bonbons@linux-vserver.org>
Tested-by: Rafael J Wysocki <rjw@rjwysocki.net>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Cc: Ilya Dryomov <ilya.dryomov@inktank.com>,
Cc: Mike Galbraith <umgwanakikbuti@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Peter Hurley <peter@hurleysoftware.com>,
Cc: Davidlohr Bueso <dave@stgolabs.net>,
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-01 12:23:32 -08:00
Linus Torvalds 788807d7ca Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull i2c fixes from Wolfram Sang:
 "i2c driver bugfixes (s3c2410, slave-eeprom, sh_mobile), size
  regression "bugfix" (i2c slave), documentation bugfix (st).

  Also, one documentation update (da9063), so some devicetrees can now
  be verified"

* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: sh_mobile: terminate DMA reads properly
  i2c: Only include slave support if selected
  i2c: s3c2410: fix ABBA deadlock by keeping clock prepared
  i2c: slave-eeprom: fix boundary check when using sysfs
  i2c: st: Rename clock reference to something that exists
  DT: i2c: Add devices handled by the da9063 MFD driver
2015-01-31 10:34:25 -08:00
Linus Torvalds 6155bc1431 Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar:
 "Mostly tooling fixes, but also an event groups fix, two PMU driver
  fixes and a CPU model variant addition"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf: Tighten (and fix) the grouping condition
  perf/x86/intel: Add model number for Airmont
  perf/rapl: Fix crash in rapl_scale()
  perf/x86/intel/uncore: Move uncore_box_init() out of driver initialization
  perf probe: Fix probing kretprobes
  perf symbols: Introduce 'for' method to iterate over the symbols with a given name
  perf probe: Do not rely on map__load() filter to find symbols
  perf symbols: Introduce method to iterate symbols ordered by name
  perf symbols: Return the first entry with a given name in find_by_name method
  perf annotate: Fix memory leaks in LOCK handling
  perf annotate: Handle ins parsing failures
  perf scripting perl: Force to use stdbool
  perf evlist: Remove extraneous 'was' on error message
2015-01-30 14:34:55 -08:00
Linus Torvalds 92ef9ce301 Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Pull quota and UDF fix from Jan Kara:
 "A fix for UDF to properly free preallocated blocks and a fix for quota
  so that Q_GETQUOTA quotactl reports correct numbers for XFS filesystem
  (and similarly Q_XGETQUOTA quotactl works properly for other
  filesystems)"

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  quota: Switch ->get_dqblk() and ->set_dqblk() to use bytes as space units
  udf: Release preallocation on last writeable close
2015-01-30 13:46:04 -08:00
Linus Torvalds 33692f2759 vm: add VM_FAULT_SIGSEGV handling support
The core VM already knows about VM_FAULT_SIGBUS, but cannot return a
"you should SIGSEGV" error, because the SIGSEGV case was generally
handled by the caller - usually the architecture fault handler.

That results in lots of duplication - all the architecture fault
handlers end up doing very similar "look up vma, check permissions, do
retries etc" - but it generally works.  However, there are cases where
the VM actually wants to SIGSEGV, and applications _expect_ SIGSEGV.

In particular, when accessing the stack guard page, libsigsegv expects a
SIGSEGV.  And it usually got one, because the stack growth is handled by
that duplicated architecture fault handler.

However, when the generic VM layer started propagating the error return
from the stack expansion in commit fee7e49d45 ("mm: propagate error
from stack expansion even for guard page"), that now exposed the
existing VM_FAULT_SIGBUS result to user space.  And user space really
expected SIGSEGV, not SIGBUS.

To fix that case, we need to add a VM_FAULT_SIGSEGV, and teach all those
duplicate architecture fault handlers about it.  They all already have
the code to handle SIGSEGV, so it's about just tying that new return
value to the existing code, but it's all a bit annoying.

This is the mindless minimal patch to do this.  A more extensive patch
would be to try to gather up the mostly shared fault handling logic into
one generic helper routine, and long-term we really should do that
cleanup.

Just from this patch, you can generally see that most architectures just
copied (directly or indirectly) the old x86 way of doing things, but in
the meantime that original x86 model has been improved to hold the VM
semaphore for shorter times etc and to handle VM_FAULT_RETRY and other
"newer" things, so it would be a good idea to bring all those
improvements to the generic case and teach other architectures about
them too.

Reported-and-tested-by: Takashi Iwai <tiwai@suse.de>
Tested-by: Jan Engelhardt <jengelh@inai.de>
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> # "s390 still compiles and boots"
Cc: linux-arch@vger.kernel.org
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-01-29 10:51:32 -08:00
Ingo Molnar f10698ed68 Merge branch 'perf/urgent' into perf/core, to pick up fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-01-28 15:42:56 +01:00
Peter Zijlstra c3c87e7704 perf: Tighten (and fix) the grouping condition
The fix from 9fc81d8742 ("perf: Fix events installation during
moving group") was incomplete in that it failed to recognise that
creating a group with events for different CPUs is semantically
broken -- they cannot be co-scheduled.

Furthermore, it leads to real breakage where, when we create an event
for CPU Y and then migrate it to form a group on CPU X, the code gets
confused where the counter is programmed -- triggered in practice
as well by me via the perf fuzzer.

Fix this by tightening the rules for creating groups. Only allow
grouping of counters that can be co-scheduled in the same context.
This means for the same task and/or the same cpu.

Fixes: 9fc81d8742 ("perf: Fix events installation during moving group")
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/20150123125834.090683288@infradead.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-01-28 13:17:35 +01:00
Jan Kara 14bf61ffe6 quota: Switch ->get_dqblk() and ->set_dqblk() to use bytes as space units
Currently ->get_dqblk() and ->set_dqblk() use struct fs_disk_quota which
tracks space limits and usage in 512-byte blocks. However VFS quotas
track usage in bytes (as some filesystems require that) and we need to
somehow pass this information. Upto now it wasn't a problem because we
didn't do any unit conversion (thus VFS quota routines happily stuck
number of bytes into d_bcount field of struct fd_disk_quota). Only if
you tried to use Q_XGETQUOTA or Q_XSETQLIM for VFS quotas (or Q_GETQUOTA
/ Q_SETQUOTA for XFS quotas), you got bogus results. Hardly anyone
tried this but reportedly some Samba users hit the problem in practice.
So when we want interfaces compatible we need to fix this.

We bite the bullet and define another quota structure used for passing
information from/to ->get_dqblk()/->set_dqblk. It's somewhat sad we have
to have more conversion routines in fs/quota/quota.c and another copying
of quota structure slows down getting of quota information by about 2%
but it seems cleaner than overloading e.g. units of d_bcount to bytes.

CC: stable@vger.kernel.org
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
2015-01-28 09:01:40 +01:00
Linus Torvalds 59343cd7c4 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull networking fixes from David Miller:

 1) Don't OOPS on socket AIO, from Christoph Hellwig.

 2) Scheduled scans should be aborted upon RFKILL, from Emmanuel
    Grumbach.

 3) Fix sleep in atomic context in kvaser_usb, from Ahmed S Darwish.

 4) Fix RCU locking across copy_to_user() in bpf code, from Alexei
    Starovoitov.

 5) Lots of crash, memory leak, short TX packet et al bug fixes in
    sh_eth from Ben Hutchings.

 6) Fix memory corruption in SCTP wrt.  INIT collitions, from Daniel
    Borkmann.

 7) Fix return value logic for poll handlers in netxen, enic, and bnx2x.
    From Eric Dumazet and Govindarajulu Varadarajan.

 8) Header length calculation fix in mac80211 from Fred Chou.

 9) mv643xx_eth doesn't handle highmem correctly in non-TSO code paths.
    From Ezequiel Garcia.

10) udp_diag has bogus logic in it's hash chain skipping, copy same fix
    tcp diag used.  From Herbert Xu.

11) amd-xgbe programs wrong rx flow control register, from Thomas
    Lendacky.

12) Fix race leading to use after free in ping receive path, from Subash
    Abhinov Kasiviswanathan.

13) Cache redirect routes otherwise we can get a heavy backlog of rcu
    jobs liberating DST_NOCACHE entries.  From Hannes Frederic Sowa.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (48 commits)
  net: don't OOPS on socket aio
  stmmac: prevent probe drivers to crash kernel
  bnx2x: fix napi poll return value for repoll
  ipv6: replacing a rt6_info needs to purge possible propagated rt6_infos too
  sh_eth: Fix DMA-API usage for RX buffers
  sh_eth: Check for DMA mapping errors on transmit
  sh_eth: Ensure DMA engines are stopped before freeing buffers
  sh_eth: Remove RX overflow log messages
  ping: Fix race in free in receive path
  udp_diag: Fix socket skipping within chain
  can: kvaser_usb: Fix state handling upon BUS_ERROR events
  can: kvaser_usb: Retry the first bulk transfer on -ETIMEDOUT
  can: kvaser_usb: Send correct context to URB completion
  can: kvaser_usb: Do not sleep in atomic context
  ipv4: try to cache dst_entries which would cause a redirect
  samples: bpf: relax test_maps check
  bpf: rcu lock must not be held when calling copy_to_user()
  net: sctp: fix slab corruption from use after free on INIT collisions
  net: mv643xx_eth: Fix highmem support in non-TSO egress path
  sh_eth: Fix serialisation of interrupt disable with interrupt & NAPI handlers
  ...
2015-01-27 13:55:36 -08:00
Hannes Frederic Sowa df4d92549f ipv4: try to cache dst_entries which would cause a redirect
Not caching dst_entries which cause redirects could be exploited by hosts
on the same subnet, causing a severe DoS attack. This effect aggravated
since commit f886497212 ("ipv4: fix dst race in sk_dst_get()").

Lookups causing redirects will be allocated with DST_NOCACHE set which
will force dst_release to free them via RCU.  Unfortunately waiting for
RCU grace period just takes too long, we can end up with >1M dst_entries
waiting to be released and the system will run OOM. rcuos threads cannot
catch up under high softirq load.

Attaching the flag to emit a redirect later on to the specific skb allows
us to cache those dst_entries thus reducing the pressure on allocation
and deallocation.

This issue was discovered by Marcelo Leitner.

Cc: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Marcelo Leitner <mleitner@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-26 17:28:27 -08:00
Linus Torvalds 4adca1cbc4 Merge branch 'akpm' (patches from Andrew Morton)
Merge misc fixes from Andrew Morton:
 "Six fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  drivers/rtc/rtc-s5m.c: terminate s5m_rtc_id array with empty element
  printk: add dummy routine for when CONFIG_PRINTK=n
  mm/vmscan: fix highidx argument type
  memcg: remove extra newlines from memcg oom kill log
  x86, build: replace Perl script with Shell script
  mm: page_alloc: embed OOM killing naturally into allocation slowpath
2015-01-26 16:25:42 -08:00
Linus Torvalds abe3b2695d regulator: Fixes for v3.19
One correctness fix here for the s2mps11 driver which would have
 resulted in some of the regulators being completely broken together with
 a fix for locking in regualtor_put() (which is fortunately rarely called
 at all in practical systems).
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Merge tag 'regulator-v3.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator

Pull regulator fixes from Mark Brown:
 "One correctness fix here for the s2mps11 driver which would have
  resulted in some of the regulators being completely broken together
  with a fix for locking in regualtor_put() (which is fortunately rarely
  called at all in practical systems)"

* tag 'regulator-v3.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
  regulator: s2mps11: Fix wrong calculation of register offset
  regulator: core: fix race condition in regulator_put()
2015-01-26 14:52:08 -08:00
Pranith Kumar 07261edb97 printk: add dummy routine for when CONFIG_PRINTK=n
There are missing dummy routines for log_buf_addr_get() and
log_buf_len_get() for when CONFIG_PRINTK is not set causing build
failures.

This patch adds these dummy routines at the appropriate location.

Signed-off-by: Pranith Kumar <bobby.prani@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Reviewed-by: Petr Mladek <pmladek@suse.cz>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-01-26 13:37:18 -08:00
Johannes Weiner 9879de7373 mm: page_alloc: embed OOM killing naturally into allocation slowpath
The OOM killing invocation does a lot of duplicative checks against the
task's allocation context.  Rework it to take advantage of the existing
checks in the allocator slowpath.

The OOM killer is invoked when the allocator is unable to reclaim any
pages but the allocation has to keep looping.  Instead of having a check
for __GFP_NORETRY hidden in oom_gfp_allowed(), just move the OOM
invocation to the true branch of should_alloc_retry().  The __GFP_FS
check from oom_gfp_allowed() can then be moved into the OOM avoidance
branch in __alloc_pages_may_oom(), along with the PF_DUMPCORE test.

__alloc_pages_may_oom() can then signal to the caller whether the OOM
killer was invoked, instead of requiring it to duplicate the order and
high_zoneidx checks to guess this when deciding whether to continue.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.cz>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-01-26 13:37:18 -08:00
Jean Delvare d5fd120e78 i2c: Only include slave support if selected
Make the slave support depend on CONFIG_I2C_SLAVE. Otherwise it gets
included unconditionally, even when it is not needed.

I2C bus drivers which implement slave support must select
I2C_SLAVE.

Signed-off-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-01-26 22:05:20 +01:00
Linus Torvalds b73f0c8f4b Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer fixes from Thomas Gleixner:
 "A set of small fixes:

   - regression fix for exynos_mct clocksource

   - trivial build fix for kona clocksource

   - functional one liner fix for the sh_tmu clocksource

   - two validation fixes to prevent (root only) data corruption in the
     kernel via settimeofday and adjtimex.  Tagged for stable"

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  time: adjtimex: Validate the ADJ_FREQUENCY values
  time: settimeofday: Validate the values of tv from user
  clocksource: sh_tmu: Set cpu_possible_mask to fix SMP broadcast
  clocksource: kona: fix __iomem annotation
  clocksource: exynos_mct: Fix bitmask regression for exynos4_mct_write
2015-01-25 17:47:34 -08:00
Linus Torvalds 550695925d PCI updates for v3.19:
Resource management
     - Clip bridge windows to fit in upstream windows (Yinghai Lu)
 
   Virtualization
     - Mark Atheros AR93xx to avoid using bus reset (Alex Williamson)
 
   Miscellaneous
     - Update Richard Zhu's email address (Lucas Stach)
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Merge tag 'pci-v3.19-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI fixes from Bjorn Helgaas:
 "These are fixes for:

   - a resource management problem that causes a Radeon "Fatal error
     during GPU init" on machines where the BIOS programmed an invalid
     Root Port window.  This was a regression in v3.16.

   - an Atheros AR93xx device that doesn't handle PCI bus resets
     correctly.  This was a regression in v3.14.

   - an out-of-date email address"

* tag 'pci-v3.19-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  MAINTAINERS: Update Richard Zhu's email address
  sparc/PCI: Clip bridge windows to fit in upstream windows
  powerpc/PCI: Clip bridge windows to fit in upstream windows
  parisc/PCI: Clip bridge windows to fit in upstream windows
  mn10300/PCI: Clip bridge windows to fit in upstream windows
  microblaze/PCI: Clip bridge windows to fit in upstream windows
  ia64/PCI: Clip bridge windows to fit in upstream windows
  frv/PCI: Clip bridge windows to fit in upstream windows
  alpha/PCI: Clip bridge windows to fit in upstream windows
  x86/PCI: Clip bridge windows to fit in upstream windows
  PCI: Add pci_claim_bridge_resource() to clip window if necessary
  PCI: Add pci_bus_clip_resource() to clip to fit upstream window
  PCI: Pass bridge device, not bus, when updating bridge windows
  PCI: Mark Atheros AR93xx to avoid bus reset
  PCI: Add flag for devices where we can't use bus reset
2015-01-24 10:58:47 +12:00
Linus Torvalds b8de08da04 Devicetree updates for v3.19-rc6
A few bugfixes for the new DT overlay feature, documentation updates,
 spelling corrections, and changes to MAINTAINERS. Nothing earth
 shattering here.
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Merge tag 'devicetree-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/glikely/linux

Pull devicetree bug fixes and documentation updates from Grant Likely:
 "A few bugfixes for the new DT overlay feature, documentation updates,
  spelling corrections, and changes to MAINTAINERS.  Nothing earth
  shattering here"

* tag 'devicetree-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/glikely/linux:
  of/unittest: Overlays with sub-devices tests
  of/platform: Handle of_populate drivers in notifier
  of/overlay: Do not generate duplicate nodes
  devicetree: document the "qemu" and "virtio" vendor prefixes
  devicetree: document ARM bindings for QEMU's Firmware Config interface
  Documentation: of: fix typo in graph bindings
  dma-mapping: fix debug print to display correct dma_pfn_offset
  of: replace Asahi Kasei Corp vendor prefix
  ARM: dt: GIC: Spelling s/specific/specifier/, s/flaggs/flags/
  dt/bindings: arm-boards: Spelling s/pointong/pointing/
  MAINTAINERS: Update DT website and git repository
  MAINTAINERS: drop DT regex matching on of_get_property and of_match_table
2015-01-24 10:55:05 +12:00
Linus Torvalds 2e3810da41 Three small fixes. Two for x86 and one avoids that sparse bails out.
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull kvm fixes from Paolo Bonzini:
 "Three small fixes.

  Two for x86 and one avoids that sparse bails out"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: x86: SYSENTER emulation is broken
  KVM: x86: Fix of previously incomplete fix for CVE-2014-8480
  KVM: fix sparse warning in include/trace/events/kvm.h
2015-01-24 09:58:17 +12:00
Linus Torvalds 193934123c Surprising number of fixes this merge window :(
First two are minor fallout from the param rework which went in this merge
 window.
 
 Next three are a series which fixes a longstanding (but never previously
 reported and unlikely , so no CC stable) race between kallsyms and freeing
 the init section.
 
 Finally, a minor cleanup as our module refcount will now be -1 during
 unload.
 
 Thanks,
 Rusty.
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Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux

Pull module and param fixes from Rusty Russell:
 "Surprising number of fixes this merge window :(

  The first two are minor fallout from the param rework which went in
  this merge window.

  The next three are a series which fixes a longstanding (but never
  previously reported and unlikely , so no CC stable) race between
  kallsyms and freeing the init section.

  Finally, a minor cleanup as our module refcount will now be -1 during
  unload"

* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux:
  module: make module_refcount() a signed integer.
  module: fix race in kallsyms resolution during module load success.
  module: remove mod arg from module_free, rename module_memfree().
  module_arch_freeing_init(): new hook for archs before module->module_init freed.
  param: fix uninitialized read with CONFIG_DEBUG_LOCK_ALLOC
  param: initialize store function to NULL if not available.
2015-01-23 06:40:36 +12:00
Thomas Gleixner 5fbaba8603 Merge branch 'fortglx/3.19-stable/time' of https://git.linaro.org/people/john.stultz/linux into timers/urgent
Pull urgent fixes from John Stultz:

  Two urgent fixes for user triggerable time related overflow issues
2015-01-22 12:28:02 +01:00
Rusty Russell d5db139ab3 module: make module_refcount() a signed integer.
James Bottomley points out that it will be -1 during unload.  It's
only used for diagnostics, so let's not hide that as it could be a
clue as to what's gone wrong.

Cc: Jason Wessel <jason.wessel@windriver.com>
Acked-and-documention-added-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Reviewed-by: Masami Hiramatsu <maasami.hiramatsu.pt@hitachi.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2015-01-22 11:15:54 +10:30
Linus Torvalds b97f880c83 Merge branch 'for-3.19-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata
Pull libata fixes from Tejun Heo:

 - Bartlomiej will be co-maintaining PATA portion of libata.  git
   workflow will stay the same.

 - sata_sil24 wasn't happy with tag ordered submission.  An option to
   restore the old tag allocation behavior is implemented for sil24.

 - a very old race condition in PIO host state machine which can trigger
   BUG fixed.

 - other driver-specific changes

* 'for-3.19-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
  libata: prevent HSM state change race between ISR and PIO
  libata: allow sata_sil24 to opt-out of tag ordered submission
  ata: pata_at91: depend on !ARCH_MULTIPLATFORM
  ahci: Remove Device ID for Intel Sunrise Point PCH
  ahci: Use dev_info() to inform about the lack of Device Sleep support
  libata: Whitelist SSDs that are known to properly return zeroes after TRIM
  sata_dwc_460ex: fix resource leak on error path
  ata: add MAINTAINERS entry for libata PATA drivers
  libata: clean up MAINTAINERS entries
  libata: export ata_get_cmd_descript()
  ahci_xgene: Fix the DMA state machine lockup for the ATA_CMD_PACKET PIO mode command.
  ahci_xgene: Fix the endianess issue in APM X-Gene SoC AHCI SATA controller driver.
2015-01-21 07:54:16 +12:00
Linus Torvalds eef8f4c2ac Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull networking fixes from David Miller:

 1) Socket addresses returned in the error queue need to be fully
    initialized before being passed on to userspace, fix from Willem de
    Bruijn.

 2) Interrupt handling fixes to davinci_emac driver from Tony Lindgren.

 3) Fix races between receive packet steering and cpu hotplug, from Eric
    Dumazet.

 4) Allowing netlink sockets to subscribe to unknown multicast groups
    leads to crashes, don't allow it.  From Johannes Berg.

 5) One to many socket races in SCTP fixed by Daniel Borkmann.

 6) Put in a guard against the mis-use of ipv6 atomic fragments, from
    Hagen Paul Pfeifer.

 7) Fix promisc mode and ethtool crashes in sh_eth driver, from Ben
    Hutchings.

 8) NULL deref and double kfree fix in sxgbe driver from Girish K.S and
    Byungho An.

 9) cfg80211 deadlock fix from Arik Nemtsov.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (36 commits)
  s2io: use snprintf() as a safety feature
  r8152: remove sram_read
  r8152: remove generic_ocp_read before writing
  bgmac: activate irqs only if there is nothing to poll
  bgmac: register napi before the device
  sh_eth: Fix ethtool operation crash when net device is down
  sh_eth: Fix promiscuous mode on chips without TSU
  ipv6: stop sending PTB packets for MTU < 1280
  net: sctp: fix race for one-to-many sockets in sendmsg's auto associate
  genetlink: synchronize socket closing and family removal
  genetlink: disallow subscribing to unknown mcast groups
  genetlink: document parallel_ops
  net: rps: fix cpu unplug
  net: davinci_emac: Add support for emac on dm816x
  net: davinci_emac: Fix ioremap for devices with MDIO within the EMAC address space
  net: davinci_emac: Fix incomplete code for getting the phy from device tree
  net: davinci_emac: Free clock after checking the frequency
  net: davinci_emac: Fix runtime pm calls for davinci_emac
  net: davinci_emac: Fix hangs with interrupts
  ip: zero sockaddr returned on error queue
  ...
2015-01-20 18:19:31 +12:00
Rusty Russell be1f221c04 module: remove mod arg from module_free, rename module_memfree().
Nothing needs the module pointer any more, and the next patch will
call it from RCU, where the module itself might no longer exist.
Removing the arg is the safest approach.

This just codifies the use of the module_alloc/module_free pattern
which ftrace and bpf use.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Cc: Mikael Starvik <starvik@axis.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Ley Foon Tan <lftan@altera.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Chris Metcalf <cmetcalf@ezchip.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: x86@kernel.org
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: linux-cris-kernel@axis.com
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: nios2-dev@lists.rocketboards.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: sparclinux@vger.kernel.org
Cc: netdev@vger.kernel.org
2015-01-20 11:38:33 +10:30
Rusty Russell d453cded05 module_arch_freeing_init(): new hook for archs before module->module_init freed.
Archs have been abusing module_free() to clean up their arch-specific
allocations.  Since module_free() is also (ab)used by BPF and trace code,
let's keep it to simple allocations, and provide a hook called before
that.

This means that avr32, ia64, parisc and s390 no longer need to implement
their own module_free() at all.  avr32 doesn't need module_finalize()
either.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: Chris Metcalf <cmetcalf@ezchip.com>
Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: Helge Deller <deller@gmx.de>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: linux-kernel@vger.kernel.org
Cc: linux-ia64@vger.kernel.org
Cc: linux-parisc@vger.kernel.org
Cc: linux-s390@vger.kernel.org
2015-01-20 11:38:32 +10:30
Dan Williams 72dd299d50 libata: allow sata_sil24 to opt-out of tag ordered submission
Ronny reports: https://bugzilla.kernel.org/show_bug.cgi?id=87101
    "Since commit 8a4aeec8d "libata/ahci: accommodate tag ordered
    controllers" the access to the harddisk on the first SATA-port is
    failing on its first access. The access to the harddisk on the
    second port is working normal.

    When reverting the above commit, access to both harddisks is working
    fine again."

Maintain tag ordered submission as the default, but allow sata_sil24 to
continue with the old behavior.

Cc: <stable@vger.kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Reported-by: Ronny Hegewald <Ronny.Hegewald@online.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
2015-01-19 09:10:07 -05:00
Christian Borntraeger cdef511985 KVM: fix sparse warning in include/trace/events/kvm.h
sparse complains about
include/trace/events/kvm.h:163:1: error: directive in argument list
include/trace/events/kvm.h:167:1: error: directive in argument list
include/trace/events/kvm.h:169:1: error: directive in argument list
and sparse is right. Preprocessing directives in an argument of a
macro are undefined behaviour as of C99 6.10.3p11.

Lets use an indirection to fix this.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-01-19 11:07:57 +01:00
Linus Torvalds 66893885bb Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Pull input subsystem fixes from Dmitry Torokhov.

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: uinput - fix ioctl nr overflow for UI_GET_SYSNAME/VERSION
  Input: I8042 - add Acer Aspire 7738 to the nomux list
  Input: elantech - support new ICs types for version 4
  Input: i8042 - reset keyboard to fix Elantech touchpad detection
  MAINTAINERS: remove Dmitry Torokhov's alternate address
2015-01-19 04:55:23 +12:00
Johannes Berg ee1c244219 genetlink: synchronize socket closing and family removal
In addition to the problem Jeff Layton reported, I looked at the code
and reproduced the same warning by subscribing and removing the genl
family with a socket still open. This is a fairly tricky race which
originates in the fact that generic netlink allows the family to go
away while sockets are still open - unlike regular netlink which has
a module refcount for every open socket so in general this cannot be
triggered.

Trying to resolve this issue by the obvious locking isn't possible as
it will result in deadlocks between unregistration and group unbind
notification (which incidentally lockdep doesn't find due to the home
grown locking in the netlink table.)

To really resolve this, introduce a "closing socket" reference counter
(for generic netlink only, as it's the only affected family) in the
core netlink code and use that in generic netlink to wait for all the
sockets that are being closed at the same time as a generic netlink
family is removed.

This fixes the race that when a socket is closed, it will should call
the unbind, but if the family is removed at the same time the unbind
will not find it, leading to the warning. The real problem though is
that in this case the unbind could actually find a new family that is
registered to have a multicast group with the same ID, and call its
mcast_unbind() leading to confusing.

Also remove the warning since it would still trigger, but is now no
longer a problem.

This also moves the code in af_netlink.c to before unreferencing the
module to avoid having the same problem in the normal non-genl case.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-16 17:04:25 -05:00
Johannes Berg f555f3d76a genetlink: document parallel_ops
The kernel-doc for the parallel_ops family struct member is
missing, add it.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-16 17:04:24 -05:00
Linus Torvalds 79600d4bba USB fixes for 3.19-rc5
Here is a bunch of USB fixes for 3.19-rc5.
 
 Most of these are gadget driver fixes, along with the xhci driver fix
 that we both reported having problems with, as well as some new device
 ids and other tiny fixes.
 
 All have been in linux-next with no problems.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-3.19-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB fixes from Greg KH:
 "Here is a bunch of USB fixes for 3.19-rc5.

  Most of these are gadget driver fixes, along with the xhci driver fix
  that we both reported having problems with, as well as some new device
  ids and other tiny fixes.

  All have been in linux-next with no problems"

* tag 'usb-3.19-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (43 commits)
  usb: dwc3: gadget: Stop TRB preparation after limit is reached
  usb: dwc3: gadget: Fix TRB preparation during SG
  usb: phy: mv-usb: fix usb_phy build errors
  usb: serial: handle -ENODEV quietly in generic_submit_read_urb
  usb: serial: silence all non-critical read errors
  USB: console: fix potential use after free
  USB: console: fix uninitialised ldisc semaphore
  usb: gadget: udc: atmel: fix possible oops when unloading module
  usb: gadget: gadgetfs: fix an oops in ep_write()
  usb: phy: Fix deferred probing
  OHCI: add a quirk for ULi M5237 blocking on reset
  uas: Add US_FL_NO_ATA_1X for 2 more Seagate disk enclosures
  uas: Do not blacklist ASM1153 disk enclosures
  usb: gadget: udc: avoid dereference before NULL check in ep_queue
  usb: host: ehci-tegra: request deferred probe when failing to get phy
  uas: disable UAS on Apricorn SATA dongles
  uas: Add US_FL_NO_REPORT_OPCODES for JMicron JMS566 with usb-id 0bc2:a013
  uas: Add US_FL_NO_ATA_1X for Seagate devices with usb-id 0bc2:a013
  xhci: Add broken-streams quirk for Fresco Logic FL1000G xhci controllers
  USB: EHCI: adjust error return code
  ...
2015-01-17 08:02:44 +13:00
Linus Torvalds a2a32cd1d7 NFS client bugfixes for Linux 3.19
Highlights include:
 
 - Stable fix for a NFSv3/lockd race
 - Fixes for several NFSv4.1 client id trunking bugs
 - Remove an incorrect test when checking for delegated opens
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Merge tag 'nfs-for-3.19-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client bugfixes from Trond Myklebust:
 "Highlights include:

   - Stable fix for a NFSv3/lockd race
   - Fixes for several NFSv4.1 client id trunking bugs
   - Remove an incorrect test when checking for delegated opens"

* tag 'nfs-for-3.19-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  NFSv4: Remove incorrect check in can_open_delegated()
  NFS: Ignore transport protocol when detecting server trunking
  NFSv4/v4.1: Verify the client owner id during trunking detection
  NFSv4: Cache the NFSv4/v4.1 client owner_id in the struct nfs_client
  NFSv4.1: Fix client id trunking on Linux
  LOCKD: Fix a race when initialising nlmsvc_timeout
2015-01-17 07:59:06 +13:00
Yinghai Lu 8505e729a2 PCI: Add pci_claim_bridge_resource() to clip window if necessary
Add pci_claim_bridge_resource() to claim a PCI-PCI bridge window.  This is
like regular pci_claim_resource(), except that if we fail to claim the
window, we check to see if we can reduce the size of the window and try
again.

This is for scenarios like this:

  pci_bus 0000:00: root bus resource [mem 0xc0000000-0xffffffff]
  pci 0000:00:01.0:   bridge window [mem 0xbdf00000-0xddefffff 64bit pref]
  pci 0000:01:00.0: reg 0x10: [mem 0xc0000000-0xcfffffff pref]

The 00:01.0 window is illegal: it starts before the host bridge window, so
we have to assume the [0xbdf00000-0xbfffffff] region is inaccessible.  We
can make it legal by clipping it to [mem 0xc0000000-0xddefffff 64bit pref].

Previously we discarded the 00:01.0 window and tried to reassign that part
of the hierarchy from scratch.  That is a problem because Linux doesn't
always assign things optimally.  For example, in this case, BIOS put the
01:00.0 device in a prefetchable window below 4GB, but after 5b28541552,
Linux puts the prefetchable window above 4GB where the 32-bit 01:00.0
device can't use it.

Clipping the 00:01.0 window is less intrusive than completely reassigning
things and is sufficient to let us use most of the BIOS configuration.  Of
course, it's possible that devices below 00:01.0 will no longer fit.  If
that's the case, we'll have to reassign things.  But that's a separate
problem.

[bhelgaas: changelog, split into separate patch]
Link: https://bugzilla.kernel.org/show_bug.cgi?id=85491
Reported-by: Marek Kordik <kordikmarek@gmail.com>
Fixes: 5b28541552 ("PCI: Restrict 64-bit prefetchable bridge windows to 64-bit resources")
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: stable@vger.kernel.org	# v3.16+
2015-01-16 10:04:42 -06:00
Alex Williamson f331a859e0 PCI: Add flag for devices where we can't use bus reset
Enable a mechanism for devices to quirk that they do not behave when
doing a PCI bus reset.  We require a modest level of spec compliant
behavior in order to do a reset, for instance the device should come
out of reset without throwing errors and PCI config space should be
accessible after reset.  This is too much to ask for some devices.

Link: http://lkml.kernel.org/r/20140923210318.498dacbd@dualc.maya.org
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: stable@vger.kernel.org	# v3.14+
2015-01-16 10:04:38 -06:00
Mark Brown 113620bb89 Merge remote-tracking branch 'regulator/fix/s2mps11' into regulator-linus 2015-01-16 12:05:35 +00:00
Oliver Hartkopp 6cfda7fbeb can: m_can: tag current CAN FD controllers as non-ISO
During the CAN FD standardization process within the ISO it turned out that
the failure detection capability has to be improved.

The CAN in Automation organization (CiA) defined the already implemented CAN
FD controllers as 'non-ISO' and the upcoming improved CAN FD controllers as
'ISO' compliant. See at http://www.can-cia.com/index.php?id=1937

Finally there will be three types of CAN FD controllers in the future:

1. ISO compliant (fixed)
2. non-ISO compliant (fixed, like the M_CAN IP v3.0.1 in m_can.c)
3. ISO/non-ISO CAN FD controllers (switchable, like the PEAK USB FD)

So the current M_CAN driver for the M_CAN IP v3.0.1 has to expose its non-ISO
implementation by setting the CAN_CTRLMODE_FD_NON_ISO ctrlmode at startup.
As this bit cannot be switched at configuration time CAN_CTRLMODE_FD_NON_ISO
must not be set in ctrlmode_supported of the current M_CAN driver.

Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2015-01-15 16:57:59 +01:00
Greg Kroah-Hartman 919ba4ee1b USB-serial fixes for v3.18-rc5
Here are a few fixes for reported problems including a possible
 null-deref on probe with keyspan, a misbehaving modem, and a couple of
 issues with the USB console.
 
 Some new device IDs are also added.
 
 Signed-off-by: Johan Hovold <johan@kernel.org>
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Merge tag 'usb-serial-3.19-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/johan/usb-serial into usb-linus

Johan writes:

USB-serial fixes for v3.18-rc5

Here are a few fixes for reported problems including a possible
null-deref on probe with keyspan, a misbehaving modem, and a couple of
issues with the USB console.

Some new device IDs are also added.

Signed-off-by: Johan Hovold <johan@kernel.org>
2015-01-14 15:39:23 -08:00
Linus Torvalds a6391a924c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull networking fixes from David Miller:

 1) Don't use uninitialized data in IPVS, from Dan Carpenter.

 2) conntrack race fixes from Pablo Neira Ayuso.

 3) Fix TX hangs with i40e, from Jesse Brandeburg.

 4) Fix budget return from poll calls in dnet and alx, from Eric
    Dumazet.

 5) Fix bugus "if (unlikely(x) < 0)" test in AF_PACKET, from Christoph
    Jaeger.

 6) Fix bug introduced by conversion to list_head in TIPC retransmit
    code, from Jon Paul Maloy.

 7) Don't use GFP_NOIO under spinlock in USB kaweth driver, from Alexey
    Khoroshilov.

 8) Fix bridge build with INET disabled, from Arnd Bergmann.

 9) Fix netlink array overrun for PROBE attributes in openvswitch, from
    Thomas Graf.

10) Don't hold spinlock across synchronize_irq() in tg3 driver, from
    Prashant Sreedharan.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (44 commits)
  tg3: Release tp->lock before invoking synchronize_irq()
  tg3: tg3_reset_task() needs to use rtnl_lock to synchronize
  tg3: tg3_timer() should grab tp->lock before checking for tp->irq_sync
  team: avoid possible underflow of count_pending value for notify_peers and mcast_rejoin
  openvswitch: packet messages need their own probe attribtue
  i40e: adds FCoE configure option
  cxgb4vf: Fix queue allocation for 40G adapter
  netdevice: Add missing parentheses in macro
  bridge: only provide proxy ARP when CONFIG_INET is enabled
  neighbour: fix base_reachable_time(_ms) not effective immediatly when changed
  net: fec: fix MDIO bus assignement for dual fec SoC's
  xen-netfront: use different locks for Rx and Tx stats
  drivers: net: cpsw: fix multicast flush in dual emac mode
  cxgb4vf: Initialize mdio_addr before using it
  net: Corrected the comment describing the ndo operations to reflect the actual prototype for couple of operations
  usb/kaweth: use GFP_ATOMIC under spin_lock in usb_start_wait_urb()
  MAINTAINERS: add me as ibmveth maintainer
  tipc: fix bug in broadcast retransmit code
  update ip-sysctl.txt documentation (v2)
  net/at91_ether: prepare and unprepare clock
  ...
2015-01-15 11:17:37 +13:00
Thomas Graf 1ba398041f openvswitch: packet messages need their own probe attribtue
User space is currently sending a OVS_FLOW_ATTR_PROBE for both flow
and packet messages. This leads to an out-of-bounds access in
ovs_packet_cmd_execute() because OVS_FLOW_ATTR_PROBE >
OVS_PACKET_ATTR_MAX.

Introduce a new OVS_PACKET_ATTR_PROBE with the same numeric value
as OVS_FLOW_ATTR_PROBE to grow the range of accepted packet attributes
while maintaining to be binary compatible with existing OVS binaries.

Fixes: 05da589 ("openvswitch: Add support for OVS_FLOW_ATTR_PROBE.")
Reported-by: Sander Eikelenboom <linux@eikelenboom.it>
Tracked-down-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Reviewed-by: Jesse Gross <jesse@nicira.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-14 16:49:44 -05:00
Benjamin Poirier 4ccce02eb3 netdevice: Add missing parentheses in macro
For example, one could conceivably call
	for_each_netdev_in_bond_rcu(condition ? bond1 : bond2, slave)
and get an unexpected result.

Signed-off-by: Benjamin Poirier <bpoirier@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-14 16:34:41 -05:00
Linus Torvalds 31238e61b5 Merge branch 'for-linus' of git://git.kernel.dk/linux-block
Pull block layer fixes from Jens Axboe:
 "The major part is an update to the NVMe driver, fixing various issues
  around surprise removal and hung controllers.  Most of that is from
  Keith, and parts are simple blk-mq fixes or exports/additions of minor
  functions to aid this effort, and parts are changes directly to the
  NVMe driver.

  Apart from the above, this contains:

   - Small blk-mq change from me, killing an unused member of the
     hardware queue structure.

   - Small fix from Ming Lei, fixing up a few drivers that didn't
     properly check for ERR_PTR() returns from blk_mq_init_queue()"

* 'for-linus' of git://git.kernel.dk/linux-block:
  NVMe: Fix locking on abort handling
  NVMe: Start and stop h/w queues on reset
  NVMe: Command abort handling fixes
  NVMe: Admin queue removal handling
  NVMe: Reference count admin queue usage
  NVMe: Start all requests
  blk-mq: End unstarted requests on a dying queue
  blk-mq: Allow requests to never expire
  blk-mq: Add helper to abort requeued requests
  blk-mq: Let drivers cancel requeue_work
  blk-mq: Export if requests were started
  blk-mq: Wake tasks entering queue on dying
  blk-mq: get rid of ->cmd_size in the hardware queue
  block: fix checking return value of blk_mq_init_queue
  block: wake up waiters when a queue is marked dying
  NVMe: Fix double free irq
  blk-mq: Export freeze/unfreeze functions
  blk-mq: Exit queue on alloc failure
2015-01-15 10:27:56 +13:00
Peter Zijlstra (Intel) 86038c5ea8 perf: Avoid horrible stack usage
Both Linus (most recent) and Steve (a while ago) reported that perf
related callbacks have massive stack bloat.

The problem is that software events need a pt_regs in order to
properly report the event location and unwind stack. And because we
could not assume one was present we allocated one on stack and filled
it with minimal bits required for operation.

Now, pt_regs is quite large, so this is undesirable. Furthermore it
turns out that most sites actually have a pt_regs pointer available,
making this even more onerous, as the stack space is pointless waste.

This patch addresses the problem by observing that software events
have well defined nesting semantics, therefore we can use static
per-cpu storage instead of on-stack.

Linus made the further observation that all but the scheduler callers
of perf_sw_event() have a pt_regs available, so we change the regular
perf_sw_event() to require a valid pt_regs (where it used to be
optional) and add perf_sw_event_sched() for the scheduler.

We have a scheduler specific call instead of a more generic _noregs()
like construct because we can assume non-recursion from the scheduler
and thereby simplify the code further (_noregs would have to put the
recursion context call inline in order to assertain which __perf_regs
element to use).

One last note on the implementation of perf_trace_buf_prepare(); we
allow .regs = NULL for those cases where we already have a pt_regs
pointer available and do not need another.

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Reported-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Javi Merino <javi.merino@arm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Petr Mladek <pmladek@suse.cz>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Tom Zanussi <tom.zanussi@linux.intel.com>
Cc: Vaibhav Nagarnaik <vnagarnaik@google.com>
Link: http://lkml.kernel.org/r/20141216115041.GW3337@twins.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-01-14 15:11:45 +01:00
Linus Torvalds 0c133dd00e As discussed on LKML http://marc.info/?l=linux-kernel&m=142081181707596
it was agreement that WRITE_ONCE(x, val) is better than ASSIGN_ONCE(val, x)
 
 Lets change that for 3.19 as 3.19 has no user yet, but the first users
 will hit linux-next soon.
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/borntraeger/linux

Pull WRITE_ONCE argument order change from Christian Borntraeger:
 "As discussed on LKML[1] it was agreed that WRITE_ONCE(x, val) is
  better than ASSIGN_ONCE(val, x)

  Lets change that for 3.19 as 3.19 has no user yet, but the first users
  will hit linux-next soon"

[1] http://marc.info/?l=linux-kernel&m=142081181707596

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/borntraeger/linux:
  kernel: Change ASSIGN_ONCE(val, x) to WRITE_ONCE(x, val)
2015-01-14 11:54:12 +13:00
Geert Uytterhoeven d6613aa750 ARM: dt: GIC: Spelling s/specific/specifier/, s/flaggs/flags/
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Stephen Warren <swarren@nvidia.com>
Cc: Rob Herring <robh+dt@kernel.org>
Signed-off-by: Rob Herring <robh@kernel.org>
2015-01-13 13:48:16 -06:00
Christian Borntraeger 43239cbe79 kernel: Change ASSIGN_ONCE(val, x) to WRITE_ONCE(x, val)
Feedback has shown that WRITE_ONCE(x, val) is easier to use than
ASSIGN_ONCE(val,x).
There are no in-tree users yet, so lets change it for 3.19.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Davidlohr Bueso <dave@stgolabs.net>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2015-01-13 20:39:09 +01:00
Linus Torvalds 613d4cefbb xen: bug fixes for 3.19-rc4
- Several critical linear p2m fixes that prevented some hosts from
   booting.
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Merge tag 'stable/for-linus-3.19-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen bug fixes from David Vrabel:
 "Several critical linear p2m fixes that prevented some hosts from
  booting"

* tag 'stable/for-linus-3.19-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  x86/xen: properly retrieve NMI reason
  xen: check for zero sized area when invalidating memory
  xen: use correct type for physical addresses
  xen: correct race in alloc_p2m_pmd()
  xen: correct error for building p2m list on 32 bits
  x86/xen: avoid freeing static 'name' when kasprintf() fails
  x86/xen: add extra memory for remapped frames during setup
  x86/xen: don't count how many PFNs are identity mapped
  x86/xen: Free bootmem in free_p2m_page() during early boot
  x86/xen: Remove unnecessary BUG_ON(preemptible()) in xen_setup_timer()
2015-01-14 08:07:42 +13:00
B Viswanath 5d632cb70f net: Corrected the comment describing the ndo operations to reflect the actual prototype for couple of operations
Corrected the comment describing the ndo operations to
reflect the actual prototype for couple of operations

Signed-off-by: B Viswanath <marichika4@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-13 14:03:42 -05:00