GitHub/MotorolaMobilityLLC/kernel-slsi.git
10 years agoum: segv: Save regs only in case of a kernel mode fault
Richard Weinberger [Sun, 20 Jul 2014 11:39:27 +0000 (13:39 +0200)]
um: segv: Save regs only in case of a kernel mode fault

...otherwise me lose user mode regs and the resulting
stack trace is useless.

Signed-off-by: Richard Weinberger <richard@nod.at>
10 years agoum: Fix hung task in fix_range_common()
Richard Weinberger [Sun, 20 Jul 2014 11:16:20 +0000 (13:16 +0200)]
um: Fix hung task in fix_range_common()

If do_ops() fails we have to release current->mm->mmap_sem
otherwise the failing task will never terminate.

Reported-by: Toralf Förster <toralf.foerster@gmx.de>
Signed-off-by: Richard Weinberger <richard@nod.at>
10 years agoum: Ensure that a stub page cannot get unmapped
Richard Weinberger [Sun, 20 Jul 2014 11:09:15 +0000 (13:09 +0200)]
um: Ensure that a stub page cannot get unmapped

Trinity discovered an execution path such that a task
can unmap his stub page.

Reported-by: Toralf Förster <toralf.foerster@gmx.de>
Signed-off-by: Richard Weinberger <richard@nod.at>
10 years agoRevert "um: Fix wait_stub_done() error handling"
Richard Weinberger [Sun, 20 Jul 2014 10:56:34 +0000 (12:56 +0200)]
Revert "um: Fix wait_stub_done() error handling"

This reverts commit 0974a9cadc7886f7baaa458bb0c89f5c5f9d458e.
The real for for that issue is to release current->mm->mmap_sem in
fix_range_common().

Signed-off-by: Richard Weinberger <richard@nod.at>
10 years agoMerge branch 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 19 Jul 2014 16:27:55 +0000 (06:27 -1000)]
Merge branch 'locking-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull locking fixes from Thomas Gleixner:
 "The locking department delivers:

   - A rather large and intrusive bundle of fixes to address serious
     performance regressions introduced by the new rwsem / mcs
     technology.  Simpler solutions have been discussed, but they would
     have been ugly bandaids with more risk than doing the right thing.

   - Make the rwsem spin on owner technology opt-in for architectures
     and enable it only on the known to work ones.

   - A few fixes to the lockdep userspace library"

* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  locking/rwsem: Add CONFIG_RWSEM_SPIN_ON_OWNER
  locking/mutex: Disable optimistic spinning on some architectures
  locking/rwsem: Reduce the size of struct rw_semaphore
  locking/rwsem: Rename 'activity' to 'count'
  locking/spinlocks/mcs: Micro-optimize osq_unlock()
  locking/spinlocks/mcs: Introduce and use init macro and function for osq locks
  locking/spinlocks/mcs: Convert osq lock to atomic_t to reduce overhead
  locking/spinlocks/mcs: Rename optimistic_spin_queue() to optimistic_spin_node()
  locking/rwsem: Allow conservative optimistic spinning when readers have lock
  tools/liblockdep: Account for bitfield changes in lockdeps lock_acquire
  tools/liblockdep: Remove debug print left over from development
  tools/liblockdep: Fix comparison of a boolean value with a value of 2

10 years agoMerge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 19 Jul 2014 16:26:43 +0000 (06:26 -1000)]
Merge branch 'sched-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull scheduler fix from Thomas Gleixner:
 "Prevent a possible divide by zero in the debugging code"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched: Fix possible divide by zero in avg_atom() calculation

10 years agoMerge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 19 Jul 2014 16:26:01 +0000 (06:26 -1000)]
Merge branch 'irq-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull irq fixes from Thomas Gleixner:
 "Three patches addressing shortcomings in the ARM gic interrupt chip
  driver"

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqchip: gic: Fix core ID calculation when topology is read from DT
  irqchip: gic: Add binding probe for ARM GIC400
  irqchip: gic: Add support for cortex a7 compatible string

10 years agoMerge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 19 Jul 2014 16:25:03 +0000 (06:25 -1000)]
Merge branch 'timers-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull timer fix from Thomas Gleixner:
 "A single fix for a long standing issue in the alarm timer subsystem,
  which was noticed recently when people finally started to use alarm
  timers for serious work"

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  alarmtimer: Fix bug where relative alarm timers were treated as absolute

10 years agoMerge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 19 Jul 2014 16:23:27 +0000 (06:23 -1000)]
Merge branch 'core-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull RCU fixes from Thomas Gleixner:
 "Two RCU patches:
   - Address a serious performance regression on open/close caused by
     commit ac1bea85781e ("Make cond_resched() report RCU quiescent
     states")
   - Export RCU debug functions.  Not a regression, but enablement to
     address a serious recursion bug in the sl*b allocators in 3.17"

* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  rcu: Reduce overhead of cond_resched() checks for RCU
  rcu: Export debug_init_rcu_head() and and debug_init_rcu_head()

10 years agoMerge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm...
Linus Torvalds [Sat, 19 Jul 2014 06:49:47 +0000 (20:49 -1000)]
Merge tag 'fixes-for-linus' of git://git./linux/kernel/git/arm/arm-soc

Pull ARM SoC fixes from Olof Johansson:
 "A smaller set of fixes this week, and all regression fixes:
   - a handful of issues fixed on at91 with common clock conversion
   - a set of fixes for Marvell mvebu (SMP, coherency, PM)
   - a clock fix for i.MX6Q.
   - ... and a SMP/hotplug fix for Exynos"

* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  ARM: EXYNOS: Fix core ID used by platsmp and hotplug code
  ARM: at91/dt: add missing clocks property to pwm node in sam9x5.dtsi
  ARM: at91/dt: fix usb0 clocks definition in sam9n12 dtsi
  ARM: at91: at91sam9x5: correct typo error for ohci clock
  ARM: clk-imx6q: parent lvds_sel input from upstream clock gates
  ARM: mvebu: Fix coherency bus notifiers by using separate notifiers
  ARM: mvebu: Fix the operand list in the inline asm of armada_370_xp_pmsu_idle_enter
  ARM: mvebu: fix SMP boot for Armada 38x and Armada 375 Z1 in big endian

10 years agoMerge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 19 Jul 2014 06:46:55 +0000 (20:46 -1000)]
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86 fixes from Peter Anvin:
 "A couple of key fixes and a few less critical ones.  The main ones
  are:

   - add a .bss section to the PE/COFF headers when building with EFI
     stub

   - invoke the correct paravirt magic when building the espfix page
     tables

  Unfortunately both of these areas also have at least one additional
  fix each still in thie pipeline, but which are not yet ready to push"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86: Remove unused variable "polling"
  x86/espfix/xen: Fix allocation of pages for paravirt page tables
  x86/efi: Include a .bss section within the PE/COFF headers
  efi: fdt: Do not report an error during boot if UEFI is not available
  efi/arm64: efistub: remove local copy of linux_banner

10 years agoMerge tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland...
Linus Torvalds [Sat, 19 Jul 2014 06:39:34 +0000 (20:39 -1000)]
Merge tag 'rdma-for-linus' of git://git./linux/kernel/git/roland/infiniband

Pull infiniband/rdma fixes from Roland Dreier:
 - cxgb4 hardware driver regression fixes
 - mlx5 hardware driver regression fixes

* tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband:
  IB/mlx5: Enable "block multicast loopback" for kernel consumers
  RDMA/cxgb4: Call iwpm_init() only once
  mlx5_core: Fix possible race between mr tree insert/delete
  RDMA/cxgb4: Initialize the device status page
  RDMA/cxgb4: Clean up connection on ARP error
  RDMA/cxgb4: Fix skb_leak in reject_cr()

10 years agoMerge tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck...
Linus Torvalds [Sat, 19 Jul 2014 06:37:24 +0000 (20:37 -1000)]
Merge tag 'hwmon-for-linus' of git://git./linux/kernel/git/groeck/linux-staging

Pull hwmon fixes from Guenter Roeck:
 "More fallout from module tests and code inspection.

  Fixes to temperature limit write operations in adt7470 driver.  Also,
  dashes are not allowed in hwmon 'name' attributes.  Fix drivers where
  necessary"

* tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: (adt7470) Fix writes to temperature limit registers
  hwmon: (da9055) Don't use dash in the name attribute
  hwmon: (da9052) Don't use dash in the name attribute

10 years agoMerge tag 'iommu-fixes-v3.16-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sat, 19 Jul 2014 06:36:13 +0000 (20:36 -1000)]
Merge tag 'iommu-fixes-v3.16-rc5' of git://git./linux/kernel/git/joro/iommu

Pull iommu fixes from Joerg Roedel:
 "A couple of fixes for the Freescale PAMU driver queued up:

   - fix PAMU window size check.
   - fix the device domain attach condition.
   - fix the error condition during iommu group"

* tag 'iommu-fixes-v3.16-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  iommu/fsl: Fix the error condition during iommu group
  iommu/fsl: Fix the device domain attach condition.
  iommu/fsl: Fix PAMU window size check.

10 years agoMerge tag 'pm+acpi-3.16-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...
Linus Torvalds [Sat, 19 Jul 2014 06:28:27 +0000 (20:28 -1000)]
Merge tag 'pm+acpi-3.16-rc6' of git://git./linux/kernel/git/rafael/linux-pm

Pull ACPI and power management fixes from Rafael Wysocki:
 "These are a few recent regression fixes, a revert of the ACPI video
  commit I promised, a system resume fix related to request_firmware(),
  an ACPI video quirk for one more Win8-oriented BIOS, an ACPI device
  enumeration documentation update and a few fixes for ARM cpufreq
  drivers.

  Specifics:

   - Fix for a recently introduced NULL pointer dereference in the core
     system suspend code occuring when platforms without ACPI attempt to
     use the "freeze" sleep state from Zhang Rui.

   - Fix for a recently introduced build warning in cpufreq headers from
     Brian W Hart.

   - Fix for a 3.13 cpufreq regression related to sysem resume that
     triggers on some systems with multiple CPU clusters from Viresh
     Kumar.

   - Fix for a 3.4 regression in request_firmware() resulting in
     WARN_ON()s on some systems during system resume from Takashi Iwai.

   - Revert of the ACPI video commit that changed the default value of
     the video.brightness_switch_enabled command line argument to 0 as
     it has been reported to break existing setups.

   - ACPI device enumeration documentation update to take recent code
     changes into account and make the documentation match the code
     again from Darren Hart.

   - Fixes for the sa1110, imx6q, kirkwood, and cpu0 cpufreq drivers
     from Linus Walleij, Nicolas Del Piano, Quentin Armitage, Viresh
     Kumar.

   - New ACPI video blacklist entry for HP ProBook 4540s from Hans de
     Goede"

* tag 'pm+acpi-3.16-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  cpufreq: make table sentinel macros unsigned to match use
  cpufreq: move policy kobj to policy->cpu at resume
  cpufreq: cpu0: OPPs can be populated at runtime
  cpufreq: kirkwood: Reinstate cpufreq driver for ARCH_KIRKWOOD
  cpufreq: imx6q: Select PM_OPP
  cpufreq: sa1110: set memory type for h3600
  ACPI / video: Add use_native_backlight quirk for HP ProBook 4540s
  PM / sleep: fix freeze_ops NULL pointer dereferences
  PM / sleep: Fix request_firmware() error at resume
  Revert "ACPI / video: change acpi-video brightness_switch_enabled default to 0"
  ACPI / documentation: Remove reference to acpi_platform_device_ids from enumeration.txt

10 years agoMerge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Linus Torvalds [Sat, 19 Jul 2014 06:27:23 +0000 (20:27 -1000)]
Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux

Pull drm fixes from Dave Airlie:
 "One nouveau deadlock fix, one qxl irq handling fix, and a set of
  radeon pageflipping changes that fix regressions in pageflipping since
  -rc1 along with a leak and backlight fix.

  The pageflipping fixes are a bit bigger than I'd like, but there has
  been a few people focused on testing them"

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  drm/radeon: Make classic pageflip completion path less racy.
  drm/radeon: Add missing vblank_put in pageflip ioctl error path.
  drm/radeon: Remove redundant fence unref in pageflip path.
  drm/radeon: Complete page flip even if waiting on the BO fence fails
  drm/radeon: Move pinning the BO back to radeon_crtc_page_flip()
  drm/radeon: Prevent too early kms-pageflips triggered by vblank.
  drm/radeon: set default bl level to something reasonable
  drm/radeon: avoid leaking edid data
  drm/qxl: return IRQ_NONE if it was not our irq
  drm/nouveau/therm: fix a potential deadlock in the therm monitoring code

10 years agoMerge tag 'random_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 19 Jul 2014 06:26:46 +0000 (20:26 -1000)]
Merge tag 'random_for_linus_stable' of git://git./linux/kernel/git/tytso/random

Pull /dev/random fix from Ted Ts'o:
 "Fix a BUG splat found by trinity"

* tag 'random_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random:
  random: check for increase of entropy_count because of signed conversion

10 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Linus Torvalds [Sat, 19 Jul 2014 06:25:54 +0000 (20:25 -1000)]
Merge git://git./linux/kernel/git/herbert/crypto-2.6

Pull crypto fixes from Herbert Xu:
 "This push fixes a boot hang in virt guests when the virtio RNG is
  enabled"

* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  hwrng: virtio - ensure reads happen after successful probe
  hwrng: fetch randomness only after device init

10 years agorandom: check for increase of entropy_count because of signed conversion
Hannes Frederic Sowa [Fri, 18 Jul 2014 21:26:41 +0000 (17:26 -0400)]
random: check for increase of entropy_count because of signed conversion

The expression entropy_count -= ibytes << (ENTROPY_SHIFT + 3) could
actually increase entropy_count if during assignment of the unsigned
expression on the RHS (mind the -=) we reduce the value modulo
2^width(int) and assign it to entropy_count. Trinity found this.

[ Commit modified by tytso to add an additional safety check for a
  negative entropy_count -- which should never happen, and to also add
  an additional paranoia check to prevent overly large count values to
  be passed into urandom_read().  ]

Reported-by: Dave Jones <davej@redhat.com>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@vger.kernel.org
10 years agoARM: EXYNOS: Fix core ID used by platsmp and hotplug code
Tomasz Figa [Tue, 15 Jul 2014 17:59:18 +0000 (02:59 +0900)]
ARM: EXYNOS: Fix core ID used by platsmp and hotplug code

When CPU topology is specified in device tree, cpu_logical_map() does
not return core ID anymore, but rather full MPIDR value. This breaks
existing calculation of PMU register offsets on Exynos SoCs.

This patch fixes the problem by adjusting the code to use only core ID
bits of the value returned by cpu_logical_map() to allow CPU topology to
be specified in device tree on Exynos SoCs.

Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
10 years agoMerge tag 'imx-fixes-3.16-2' of git://git.kernel.org/pub/scm/linux/kernel/git/shawngu...
Olof Johansson [Fri, 18 Jul 2014 21:40:17 +0000 (14:40 -0700)]
Merge tag 'imx-fixes-3.16-2' of git://git./linux/kernel/git/shawnguo/linux into fixes

Merge "ARM: imx: fixes for 3.16, 2nd take" from Shawn Guo:

The i.MX fixes for 3.16, 2nd take:

It fixes a hard machine hang regression for boards where only pcie is
active but no sata, as the latest imx6-pcie driver is no longer enabling
the upstream clock directly but only lvds clk out.

* tag 'imx-fixes-3.16-2' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux:
  ARM: clk-imx6q: parent lvds_sel input from upstream clock gates

Signed-off-by: Olof Johansson <olof@lixom.net>
10 years agoMerge tag 'at91-fixes' of git://github.com/at91linux/linux-at91 into fixes
Olof Johansson [Fri, 18 Jul 2014 21:39:18 +0000 (14:39 -0700)]
Merge tag 'at91-fixes' of git://github.com/at91linux/linux-at91 into fixes

Merge "at91: fixes for 3.16 #2" from Nicolas Ferre:

Second AT91 fixes series for 3.16
- fix clock definitions after the move to CCF for:
  * at91sam9n12 (ohci)
  * at91sam9x5 (ohci, pwm)

* tag 'at91-fixes' of git://github.com/at91linux/linux-at91:
  ARM: at91/dt: add missing clocks property to pwm node in sam9x5.dtsi
  ARM: at91/dt: fix usb0 clocks definition in sam9n12 dtsi
  ARM: at91: at91sam9x5: correct typo error for ohci clock

Signed-off-by: Olof Johansson <olof@lixom.net>
10 years agoMerge tag 'mvebu-fixes-3.16-3' of git://git.infradead.org/linux-mvebu into fixes
Olof Johansson [Fri, 18 Jul 2014 21:38:28 +0000 (14:38 -0700)]
Merge tag 'mvebu-fixes-3.16-3' of git://git.infradead.org/linux-mvebu into fixes

Merge "mvebu fixes for v3.16 (round 3)" from Jason Cooper:

 - Fix SMP boot on 38x/375 in big endian
 - Fix operand list for pmsu on 370/XP
 - Fix coherency bus notifiers

* tag 'mvebu-fixes-3.16-3' of git://git.infradead.org/linux-mvebu:
  ARM: mvebu: Fix coherency bus notifiers by using separate notifiers
  ARM: mvebu: Fix the operand list in the inline asm of armada_370_xp_pmsu_idle_enter
  ARM: mvebu: fix SMP boot for Armada 38x and Armada 375 Z1 in big endian

Signed-off-by: Olof Johansson <olof@lixom.net>
10 years agoMerge tag 'gfs2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2...
Linus Torvalds [Fri, 18 Jul 2014 16:26:04 +0000 (06:26 -1000)]
Merge tag 'gfs2-fixes' of git://git./linux/kernel/git/steve/gfs2-3.0-fixes

Pull gfs2 fixes from Steven Whitehouse:
 "This patch set contains two minor docs/spelling fixes, some fixes for
  flock, a change to use GFP_NOFS to avoid recursion on a rarely used
  code path and a fix for a race relating to the glock lru"

* tag 'gfs2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-3.0-fixes:
  GFS2: fs/gfs2/rgrp.c: kernel-doc warning fixes
  GFS2: memcontrol: Spelling s/invlidate/invalidate/
  GFS2: Allow caching of glocks for flock
  GFS2: Allow flocks to use normal glock dq rather than dq_wait
  GFS2: replace count*size kzalloc by kcalloc
  GFS2: Use GFP_NOFS when allocating glocks
  GFS2: Fix race in glock lru glock disposal
  GFS2: Only wait for demote when last holder is dequeued

10 years agoMerge tag 'dm-3.16-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device...
Linus Torvalds [Fri, 18 Jul 2014 16:25:05 +0000 (06:25 -1000)]
Merge tag 'dm-3.16-fixes-2' of git://git./linux/kernel/git/device-mapper/linux-dm

Pull device mapper fixes from Mike Snitzer:
 "Fix the dm-thinp and dm-cache targets to disallow changing the data
  device's block size"

* tag 'dm-3.16-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
  dm cache metadata: do not allow the data block size to change
  dm thin metadata: do not allow the data block size to change

10 years agoMerge tag 'upstream-3.16-rc6' of git://git.infradead.org/linux-ubifs
Linus Torvalds [Fri, 18 Jul 2014 16:23:34 +0000 (06:23 -1000)]
Merge tag 'upstream-3.16-rc6' of git://git.infradead.org/linux-ubifs

Pull UBI fixes from Artem Bityutskiy:
 "Two UBI fastmap-related fixes for v3.16:

   - fix UBI fastmap support which we broke in 3.16-rc1 by reversing the
     volumes RB-tree sorting criteria.
   - make sure that we scrub all PEBs where we see bit-flips - we were
     missing some of them when the fastmap feature was enabled"

* tag 'upstream-3.16-rc6' of git://git.infradead.org/linux-ubifs:
  UBI: fastmap: do not miss bit-flips
  UBI: fix the volumes tree sorting criteria

10 years agoMerge tag 'xfs-for-linus-3.16-rc5' of git://oss.sgi.com/xfs/xfs
Linus Torvalds [Fri, 18 Jul 2014 16:21:43 +0000 (06:21 -1000)]
Merge tag 'xfs-for-linus-3.16-rc5' of git://oss.sgi.com/xfs/xfs

Pull xfs fixes from Dave Chinner:
 "Fixes for low memory perforamnce regressions and a quota inode
  handling regression.

  These are regression fixes for issues recently introduced - the change
  in the stack switch location is fairly important, so I've held off
  sending this update until I was sure that it still addresses the stack
  usage problem the original solved.  So while the commits in the xfs
  tree are recent, it has been under tested for several weeks now"

* tag 'xfs-for-linus-3.16-rc5' of git://oss.sgi.com/xfs/xfs:
  xfs: null unused quota inodes when quota is on
  xfs: refine the allocation stack switch
  Revert "xfs: block allocation work needs to be kswapd aware"

10 years agoARM: at91/dt: add missing clocks property to pwm node in sam9x5.dtsi
Boris BREZILLON [Thu, 17 Jul 2014 19:03:58 +0000 (21:03 +0200)]
ARM: at91/dt: add missing clocks property to pwm node in sam9x5.dtsi

The pwm driver requires a clocks property referencing the pwm peripheral
clk.

Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
10 years agoARM: at91/dt: fix usb0 clocks definition in sam9n12 dtsi
Boris BREZILLON [Mon, 14 Jul 2014 06:39:27 +0000 (08:39 +0200)]
ARM: at91/dt: fix usb0 clocks definition in sam9n12 dtsi

udphs_clk (USB Device Controller clock) is referenced instead of
uhphs_clk (USB Host Controller clock).

Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com>
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
10 years agoARM: at91: at91sam9x5: correct typo error for ohci clock
Bo Shen [Mon, 14 Jul 2014 03:08:14 +0000 (11:08 +0800)]
ARM: at91: at91sam9x5: correct typo error for ohci clock

Correct the typo error for the second "uhphs_clk".

Signed-off-by: Bo Shen <voice.shen@atmel.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
10 years agoirqchip: gic: Fix core ID calculation when topology is read from DT
Tomasz Figa [Thu, 17 Jul 2014 15:23:44 +0000 (17:23 +0200)]
irqchip: gic: Fix core ID calculation when topology is read from DT

Certain GIC implementation, namely those found on earlier, single
cluster, Exynos SoCs, have registers mapped without per-CPU banking,
which means that the driver needs to use different offset for each CPU.

Currently the driver calculates the offset by multiplying value returned
by cpu_logical_map() by CPU offset parsed from DT. This is correct when
CPU topology is not specified in DT and aforementioned function returns
core ID alone. However when DT contains CPU topology, the function
changes to return cluster ID as well, which is non-zero on mentioned
SoCs and so breaks the calculation in GIC driver.

This patch fixes this by masking out cluster ID in CPU offset
calculation so that only core ID is considered. Multi-cluster Exynos
SoCs already have banked GIC implementations, so this simple fix should
be enough.

Reported-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reported-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Fixes: db0d4db22a78d ("ARM: gic: allow GIC to support non-banked setups")
Cc: <stable@vger.kernel.org> # v3.3+
Link: https://lkml.kernel.org/r/1405610624-18722-1-git-send-email-t.figa@samsung.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
10 years agoGFS2: fs/gfs2/rgrp.c: kernel-doc warning fixes
Fabian Frederick [Wed, 2 Jul 2014 20:05:27 +0000 (22:05 +0200)]
GFS2: fs/gfs2/rgrp.c: kernel-doc warning fixes

Cc: cluster-devel@redhat.com
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
10 years agoGFS2: memcontrol: Spelling s/invlidate/invalidate/
Geert Uytterhoeven [Sun, 29 Jun 2014 10:21:39 +0000 (12:21 +0200)]
GFS2: memcontrol: Spelling s/invlidate/invalidate/

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: cluster-devel@redhat.com
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
10 years agoGFS2: Allow caching of glocks for flock
Bob Peterson [Thu, 26 Jun 2014 14:47:48 +0000 (10:47 -0400)]
GFS2: Allow caching of glocks for flock

This patch removes the GLF_NOCACHE flag from the glocks associated with
flocks. There should be no good reason not to cache glocks for flocks:
they only force the glock to be demoted before they can be reacquired,
which can slow down performance and even cause glock hangs, especially
in cases where the flocks are held in Shared (SH) mode.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
10 years agoGFS2: Allow flocks to use normal glock dq rather than dq_wait
Bob Peterson [Thu, 26 Jun 2014 14:46:25 +0000 (10:46 -0400)]
GFS2: Allow flocks to use normal glock dq rather than dq_wait

This patch allows flock glocks to use a non-blocking dequeue rather
than dq_wait. It also reverts the previous patch I had posted regarding
dq_wait. The reverted patch isn't necessarily a bad idea, but I decided
this might avoid unforeseen side effects, and was therefore safer.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
10 years agoGFS2: replace count*size kzalloc by kcalloc
Fabian Frederick [Wed, 25 Jun 2014 18:40:45 +0000 (20:40 +0200)]
GFS2: replace count*size kzalloc by kcalloc

kcalloc manages count*sizeof overflow.

Cc: cluster-devel@redhat.com
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
10 years agoGFS2: Use GFP_NOFS when allocating glocks
Steven Whitehouse [Mon, 23 Jun 2014 13:50:20 +0000 (14:50 +0100)]
GFS2: Use GFP_NOFS when allocating glocks

Normally GFP_KERNEL is ok here, but there is now a rarely used code path
relating to deallocation of unlinked inodes (in certain corner cases)
which if hit at times of memory shortage can cause recursion while
trying to free memory.

One solution would be to try and move the gfs2_glock_get() call so
that it is no longer called while another glock is held, but that
doesn't look at all easy, so GFP_NOFS is the best solution for the
time being.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
10 years agoGFS2: Fix race in glock lru glock disposal
Steven Whitehouse [Mon, 23 Jun 2014 13:43:32 +0000 (14:43 +0100)]
GFS2: Fix race in glock lru glock disposal

We must not leave items on the LRU list with GLF_LOCK set, since
they can be removed if the glock is brought back into use, which
may then potentially result in a hang, waiting for GLF_LOCK to
clear.

It doesn't happen very often, since it requires a glock that has
not been used for a long time to be brought back into use at the
same moment that the shrinker is part way through disposing of
glocks.

The fix is to set GLF_LOCK at a later time, when we already know
that the other locks can be obtained. Also, we now only release
the lru_lock in case a resched is needed, rather than on every
iteration.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
10 years agoGFS2: Only wait for demote when last holder is dequeued
Bob Peterson [Fri, 20 Jun 2014 13:36:41 +0000 (09:36 -0400)]
GFS2: Only wait for demote when last holder is dequeued

Function gfs2_glock_dq_wait is supposed to dequeue a glock and then
wait for the lock to be demoted. The problem is, if this is a shared
lock, its demote will depend on the other holders, which means you
might end up waiting forever because the other process is blocked.
This problem is especially apparent when dealing with nested flocks.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
10 years agoARM: clk-imx6q: parent lvds_sel input from upstream clock gates
Lucas Stach [Thu, 17 Jul 2014 10:20:14 +0000 (12:20 +0200)]
ARM: clk-imx6q: parent lvds_sel input from upstream clock gates

The i.MX6 reference manual doesn't make a clear distinction
between the fixed clock divider and the enable gate for the
pcie and sata reference clocks. This lead to the lvds mux
inputs in the imx6q clk driver to be parented from the
ref clock (which is the divider) instead of the actual gate,
which in turn prevents the upstream clock to actually be
enabled when lvds clk out is active.

This fixes a hard machine hang regression in kernel 3.16 for
boards where only pcie is active but no sata, as with this
kernel version the imx6-pcie driver is no longer enabling
the upstream clock directly but only lvds clk out.

Reported-by: Arne Ruhnau <arne.ruhnau@target-sg.com>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Tested-by: Arne Ruhnau <arne.ruhnau@target-sg.com>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
10 years agoMerge branches 'pm-sleep' and 'pm-cpufreq'
Rafael J. Wysocki [Fri, 18 Jul 2014 00:57:30 +0000 (02:57 +0200)]
Merge branches 'pm-sleep' and 'pm-cpufreq'

* pm-sleep:
  PM / sleep: fix freeze_ops NULL pointer dereferences
  PM / sleep: Fix request_firmware() error at resume

* pm-cpufreq:
  cpufreq: make table sentinel macros unsigned to match use
  cpufreq: move policy kobj to policy->cpu at resume
  cpufreq: cpu0: OPPs can be populated at runtime
  cpufreq: kirkwood: Reinstate cpufreq driver for ARCH_KIRKWOOD
  cpufreq: imx6q: Select PM_OPP
  cpufreq: sa1110: set memory type for h3600

10 years agocpufreq: make table sentinel macros unsigned to match use
Brian W Hart [Fri, 27 Jun 2014 21:09:39 +0000 (16:09 -0500)]
cpufreq: make table sentinel macros unsigned to match use

Commit 5eeaf1f18973 (cpufreq: Fix build error on some platforms that
use cpufreq_for_each_*) moved function cpufreq_next_valid() to a public
header.  Warnings are now generated when objects including that header
are built with -Wsign-compare (as an out-of-tree module might be):

.../include/linux/cpufreq.h: In function ‘cpufreq_next_valid’:
.../include/linux/cpufreq.h:519:27: warning: comparison between signed
and unsigned integer expressions [-Wsign-compare]
  while ((*pos)->frequency != CPUFREQ_TABLE_END)
                           ^
.../include/linux/cpufreq.h:520:25: warning: comparison between signed
and unsigned integer expressions [-Wsign-compare]
   if ((*pos)->frequency != CPUFREQ_ENTRY_INVALID)
                         ^

Constants CPUFREQ_ENTRY_INVALID and CPUFREQ_TABLE_END are signed, but
are used with unsigned member 'frequency' of cpufreq_frequency_table.
Update the macro definitions to be explicitly unsigned to match their
use.

This also corrects potentially wrong behavior of clk_rate_table_iter()
if unsigned long is wider than usigned int.

Fixes: 5eeaf1f18973 (cpufreq: Fix build error on some platforms that use cpufreq_for_each_*)
Signed-off-by: Brian W Hart <hartb@linux.vnet.ibm.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
10 years agoMerge branch 'drm-fixes-3.16' of git://people.freedesktop.org/~agd5f/linux into drm...
Dave Airlie [Thu, 17 Jul 2014 23:59:21 +0000 (09:59 +1000)]
Merge branch 'drm-fixes-3.16' of git://people.freedesktop.org/~agd5f/linux into drm-fixes

A few more fixes for 3.16.  The pageflipping fixes I dropped last week
have finally shaped up so this is mostly fixes for fallout from the
pageflipping code changes.  Also fix a memory leak and a black screen
when restoring the backlight on console unblanking.

* 'drm-fixes-3.16' of git://people.freedesktop.org/~agd5f/linux:
  drm/radeon: Make classic pageflip completion path less racy.
  drm/radeon: Add missing vblank_put in pageflip ioctl error path.
  drm/radeon: Remove redundant fence unref in pageflip path.
  drm/radeon: Complete page flip even if waiting on the BO fence fails
  drm/radeon: Move pinning the BO back to radeon_crtc_page_flip()
  drm/radeon: Prevent too early kms-pageflips triggered by vblank.
  drm/radeon: set default bl level to something reasonable
  drm/radeon: avoid leaking edid data

10 years agoMerge branches 'acpi-scan' and 'acpi-video'
Rafael J. Wysocki [Thu, 17 Jul 2014 23:15:17 +0000 (01:15 +0200)]
Merge branches 'acpi-scan' and 'acpi-video'

* acpi-scan:
  ACPI / documentation: Remove reference to acpi_platform_device_ids from enumeration.txt

* acpi-video:
  ACPI / video: Add use_native_backlight quirk for HP ProBook 4540s
  Revert "ACPI / video: change acpi-video brightness_switch_enabled default to 0"

10 years agoMerge tag 'stable/for-linus-3.16-rc5-tag' of git://git.kernel.org/pub/scm/linux/kerne...
Linus Torvalds [Thu, 17 Jul 2014 18:02:35 +0000 (08:02 -1000)]
Merge tag 'stable/for-linus-3.16-rc5-tag' of git://git./linux/kernel/git/xen/tip

Pull Xen fixes from Konrad Rzeszutek Wilk:
 "Two fixes found during migration of PV guests.  David would be the one
  doing this pull but he is on vacation.

  Fixes:
   - fix console deadlock when resuming PV guests
   - fix regression hit when ballooning and resuming PV guests"

* tag 'stable/for-linus-3.16-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen/balloon: set ballooned out pages as invalid in p2m
  xen/manage: fix potential deadlock when resuming the console

10 years agoMerge tag 'trace-fixes-v3.16-rc5-v2' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Thu, 17 Jul 2014 17:57:33 +0000 (07:57 -1000)]
Merge tag 'trace-fixes-v3.16-rc5-v2' of git://git./linux/kernel/git/rostedt/linux-trace

Pull tracing fixes from Steven Rostedt:
 "A few more fixes for ftrace infrastructure.

  I was cleaning out my INBOX and found two fixes from zhangwei from a
  year ago that were lost in my mail.  These fix an inconsistency
  between trace_puts() and the way trace_printk() works.  The reason
  this is important to fix is because when trace_printk() doesn't have
  any arguments, it turns into a trace_puts().  Not being able to enable
  a stack trace against trace_printk() because it does not have any
  arguments is quite confusing.  Also, the fix is rather trivial and low
  risk.

  While porting some changes to PowerPC I discovered that it still has
  the function graph tracer filter bug that if you also enable stack
  tracing the function graph tracer filter is ignored.  I fixed that up.

  Finally, Martin Lau, fixed a bug that would cause readers of the
  ftrace ring buffer to block forever even though it was suppose to be
  NONBLOCK"

This also includes the fix from an earlier pull request:

 "Oleg Nesterov fixed a memory leak that happens if a user creates a
  tracing instance, sets up a filter in an event, and then removes that
  instance.  The filter allocates memory that is never freed when the
  instance is destroyed"

* tag 'trace-fixes-v3.16-rc5-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  ring-buffer: Fix polling on trace_pipe
  tracing: Add TRACE_ITER_PRINTK flag check in __trace_puts/__trace_bputs
  tracing: Fix graph tracer with stack tracer on other archs
  tracing: Add ftrace_trace_stack into __trace_puts/__trace_bputs
  tracing: instance_rmdir() leaks ftrace_event_file->filter

10 years agodrm/radeon: Make classic pageflip completion path less racy.
Mario Kleiner [Thu, 17 Jul 2014 00:24:45 +0000 (02:24 +0200)]
drm/radeon: Make classic pageflip completion path less racy.

Need to protect mmio flip programming by event lock as well.

Need to also first enable pflip irq, then mmio program,
otherwise a flip completion may get unnoticed in the vblank
of actual completion if the flip is programmed, but
radeon_flip_work_func gets preempted immediately after
mmio programming and before vblank. In that case the
vblank irq handler wouldn't run radeon_crtc_handle_vblank()
with the completion check routine, miss the completed flip,
and only notice one vblank after actual completion, causing
a false/delayed report of flip completion.

Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
10 years agodrm/radeon: Add missing vblank_put in pageflip ioctl error path.
Mario Kleiner [Wed, 16 Jul 2014 23:37:53 +0000 (01:37 +0200)]
drm/radeon: Add missing vblank_put in pageflip ioctl error path.

Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
10 years agodrm/radeon: Remove redundant fence unref in pageflip path.
Mario Kleiner [Wed, 16 Jul 2014 23:27:25 +0000 (01:27 +0200)]
drm/radeon: Remove redundant fence unref in pageflip path.

Not needed anymore, as it is already unreffed within
radeon_flip_work_func() after its only use.

Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
10 years agodrm/radeon: Complete page flip even if waiting on the BO fence fails
Michel Dänzer [Mon, 14 Jul 2014 06:58:03 +0000 (15:58 +0900)]
drm/radeon: Complete page flip even if waiting on the BO fence fails

Otherwise the DRM core and userspace will be confused about which BO the
CRTC is scanning out.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
10 years agodrm/radeon: Move pinning the BO back to radeon_crtc_page_flip()
Michel Dänzer [Mon, 14 Jul 2014 06:48:42 +0000 (15:48 +0900)]
drm/radeon: Move pinning the BO back to radeon_crtc_page_flip()

As well as enabling the vblank interrupt. These shouldn't take any
significant amount of time, but at least pinning the BO has actually been
seen to fail in practice before, in which case we need to let userspace
know about it.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
10 years agodrm/radeon: Prevent too early kms-pageflips triggered by vblank.
Mario Kleiner [Thu, 3 Jul 2014 01:45:02 +0000 (03:45 +0200)]
drm/radeon: Prevent too early kms-pageflips triggered by vblank.

Since 3.16-rc1 we have this new failure:

When the userspace XOrg ddx schedules vblank events to
trigger deferred kms-pageflips, e.g., via the OML_sync_control
extension call glXSwapBuffersMscOML(), or if a glXSwapBuffers()
is called immediately after completion of a previous swapbuffers
call, e.g., in a tight rendering loop with minimal rendering,
it happens frequently that the pageflip ioctl() is executed
within the same vblank in which a previous kms-pageflip completed,
or - for deferred swaps - always one vblank earlier than requested
by the client app.

This causes premature pageflips and detection of failure by
the ddx, e.g., XOrg log warnings like...

"(WW) RADEON(1): radeon_dri2_flip_event_handler: Pageflip
completion event has impossible msc 201025 < target_msc 201026"

... and error/invalid return values of glXWaitForSbcOML() and
Intel_swap_events extension.

Reason is the new way in which kms-pageflips are programmed
since 3.16.

This commit changes the time window in which the hw can
execute pending programmed pageflips. Before, a pending flip
would get executed anywhere within the vblank interval. Now
a pending flip only gets executed at the leading edge of
vblank (start of front porch), making sure that a invocation
of the pageflip ioctl() within a given vblank interval will
only lead to pageflip completion in the following vblank.

Tested to death on a DCE-4 card.

Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
10 years agodrm/radeon: set default bl level to something reasonable
Alex Deucher [Tue, 15 Jul 2014 13:48:53 +0000 (09:48 -0400)]
drm/radeon: set default bl level to something reasonable

If the value in the scratch register is 0, set it to the
max level.  This fixes an issue where the console fb blanking
code calls back into the backlight driver on unblank and then
sets the backlight level to 0 after the driver has already
set the mode and enabled the backlight.

bugs:
https://bugs.freedesktop.org/show_bug.cgi?id=81382
https://bugs.freedesktop.org/show_bug.cgi?id=70207

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Tested-by: David Heidelberger <david.heidelberger@ixit.cz>
Cc: stable@vger.kernel.org
10 years agodrm/radeon: avoid leaking edid data
Alex Deucher [Mon, 14 Jul 2014 21:57:19 +0000 (17:57 -0400)]
drm/radeon: avoid leaking edid data

In some cases we fetch the edid in the detect() callback
in order to determine what sort of monitor is connected.
If that happens, don't fetch the edid again in the get_modes()
callback or we will leak the edid.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
10 years agoirqchip: gic: Add binding probe for ARM GIC400
Suravee Suthikulpanit [Mon, 14 Jul 2014 22:03:03 +0000 (00:03 +0200)]
irqchip: gic: Add binding probe for ARM GIC400

Commit 3ab72f9156bb "dt-bindings: add GIC-400 binding" added the
"arm,gic-400" compatible string, but the corresponding IRQCHIP_DECLARE
was never added to the gic driver.

Therefore add the missing irqchip declaration for it.

Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Removed additional empty line and adapted commit message to mark it
as fixing an issue.
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Will Deacon <will.deacon@arm.com>
Fixes: 3ab72f9156bb ("dt-bindings: add GIC-400 binding")
Cc: <stable@vger.kernel.org> # v3.14+
Link: https://lkml.kernel.org/r/2621565.f5eISveXXJ@diego
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
10 years agocpufreq: move policy kobj to policy->cpu at resume
Viresh Kumar [Thu, 17 Jul 2014 05:18:25 +0000 (10:48 +0530)]
cpufreq: move policy kobj to policy->cpu at resume

This is only relevant to implementations with multiple clusters, where clusters
have separate clock lines but all CPUs within a cluster share it.

Consider a dual cluster platform with 2 cores per cluster. During suspend we
start hot unplugging CPUs in order 1 to 3. When CPU2 is removed, policy->kobj
would be moved to CPU3 and when CPU3 goes down we wouldn't free policy or its
kobj as we want to retain permissions/values/etc.

Now on resume, we will get CPU2 before CPU3 and will call __cpufreq_add_dev().
We will recover the old policy and update policy->cpu from 3 to 2 from
update_policy_cpu().

But the kobj is still tied to CPU3 and isn't moved to CPU2. We wouldn't create a
link for CPU2, but would try that for CPU3 while bringing it online. Which will
report errors as CPU3 already has kobj assigned to it.

This bug got introduced with commit 42f921a, which overlooked this scenario.

To fix this, lets move kobj to the new policy->cpu while bringing first CPU of a
cluster back. Also do a WARN_ON() if kobject_move failed, as we would reach here
only for the first CPU of a non-boot cluster. And we can't recover from this
situation, if kobject_move() fails.

Fixes: 42f921a6f10c (cpufreq: remove sysfs files for CPUs which failed to come back after resume)
Cc: 3.13+ <stable@vger.kernel.org> # 3.13+
Reported-and-tested-by: Bu Yitian <ybu@qti.qualcomm.com>
Reported-by: Saravana Kannan <skannan@codeaurora.org>
Reviewed-by: Srivatsa S. Bhat <srivatsa@mit.edu>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
10 years agoMerge branches 'cxgb4' and 'mlx5' into for-next
Roland Dreier [Thu, 17 Jul 2014 06:14:42 +0000 (23:14 -0700)]
Merge branches 'cxgb4' and 'mlx5' into for-next

10 years agoIB/mlx5: Enable "block multicast loopback" for kernel consumers
Or Gerlitz [Wed, 25 Jun 2014 13:44:14 +0000 (16:44 +0300)]
IB/mlx5: Enable "block multicast loopback" for kernel consumers

In commit f360d88a2efd, we advertise blocking multicast loopback to both
kernel and userspace consumers, but don't allow kernel consumers (e.g IPoIB)
to use it with their UD QPs.  Fix that.

Fixes: f360d88a2efd ("IB/mlx5: Add block multicast loopback support")
Reported-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
10 years agohwmon: (adt7470) Fix writes to temperature limit registers
Guenter Roeck [Thu, 17 Jul 2014 00:40:31 +0000 (17:40 -0700)]
hwmon: (adt7470) Fix writes to temperature limit registers

Temperature limit registers are signed. Limits therefore need
to be clamped to (-128, 127) degrees C and not to (0, 255)
degrees C.

Without this fix, writing a limit of 128 degrees C sets the
actual limit to -128 degrees C.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Cc: stable@vger.kernel.org
Reviewed-by: Axel Lin <axel.lin@ingics.com>
10 years agodrm/qxl: return IRQ_NONE if it was not our irq
Jason Wang [Mon, 12 May 2014 08:35:39 +0000 (16:35 +0800)]
drm/qxl: return IRQ_NONE if it was not our irq

Return IRQ_NONE if it was not our irq. This is necessary for the case
when qxl is sharing irq line with a device A in a crash kernel. If qxl
is initialized before A and A's irq was raised during this gap,
returning IRQ_HANDLED in this case will cause this irq to be raised
again after EOI since kernel think it was handled but in fact it was
not.

Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
10 years agoMerge tag 'for-linus-20140716' of git://git.infradead.org/linux-mtd
Linus Torvalds [Wed, 16 Jul 2014 20:11:42 +0000 (10:11 -1000)]
Merge tag 'for-linus-20140716' of git://git.infradead.org/linux-mtd

Pull MTD fixes from Brian Norris:

 - Fix ELM suspend/resume

 - Reduce warnings if NAND ECC is too weak

 - Add CFI support for Sharp LH28F640BF NOR

   The last fix is coming in because other commits in the 3.16 cycle
   depended on this support.

* tag 'for-linus-20140716' of git://git.infradead.org/linux-mtd:
  mtd: cfi_cmdset_0001.c: add support for Sharp LH28F640BF NOR
  mtd: nand: reduce the warning noise when the ECC is too weak
  mtd: devices: elm: fix elm_context_save() and elm_context_restore() functions

10 years agoMerge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Wed, 16 Jul 2014 20:11:02 +0000 (10:11 -1000)]
Merge branch 'sched-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull scheduler fixes from Ingo Molnar:
 "A cpufreq lockup fix and a compiler warning fix"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched: Fix compiler warnings
  x86, tsc: Fix cpufreq lockup

10 years agoMerge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Wed, 16 Jul 2014 20:10:27 +0000 (10:10 -1000)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull perf fixes from Ingo Molnar:
 "Tooling fixes and an Intel PMU driver fixlet"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf: Do not allow optimized switch for non-cloned events
  perf/x86/intel: ignore CondChgd bit to avoid false NMI handling
  perf symbols: Get kernel start address by symbol name
  perf tools: Fix segfault in cumulative.callchain report

10 years agoMerge tag 'sound-3.16-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai...
Linus Torvalds [Wed, 16 Jul 2014 16:48:08 +0000 (06:48 -1000)]
Merge tag 'sound-3.16-rc6' of git://git./linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "Things seem to calm down so far, just a small few HD-audio fixes
  (regression fixes and a new codec ID addition) popping up"

* tag 'sound-3.16-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda - Fix broken PM due to incomplete i915 initialization
  ALSA: hda - Revert stream assignment order for Intel controllers
  ALSA: hda - Add new GPU codec ID 0x10de0070 to snd-hda
  ALSA: hda: Fix build warning

10 years agocpufreq: cpu0: OPPs can be populated at runtime
Viresh Kumar [Fri, 11 Jul 2014 14:54:19 +0000 (20:24 +0530)]
cpufreq: cpu0: OPPs can be populated at runtime

OPPs can be populated statically, via DT, or added at run time with
dev_pm_opp_add().

While this driver handles the first case correctly, it would fail to populate
OPPs added at runtime. Because call to of_init_opp_table() would fail as there
are no OPPs in DT and probe will return early.

To fix this, remove error checking and call dev_pm_opp_init_cpufreq_table()
unconditionally.

Update bindings as well.

Suggested-by: Stephen Boyd <sboyd@codeaurora.org>
Tested-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
10 years agocpufreq: kirkwood: Reinstate cpufreq driver for ARCH_KIRKWOOD
Quentin Armitage [Thu, 10 Jul 2014 10:15:55 +0000 (11:15 +0100)]
cpufreq: kirkwood: Reinstate cpufreq driver for ARCH_KIRKWOOD

Commit ff1f0018cf66080d8e6f59791e552615648a033a ("drivers: Enable
building of Kirkwood drivers for mach-mvebu") added Kirkwood into
mach-mvebu, adding MACH_KIRKWOOD to ARCH_KIRKWOOD in the KConfig files.

The change for ARM_KIRKWOOD_CPUFREQ replaced ARCH_KIRKWOOD with
MACH_KIRKWOOD, whereas all the other changes were ARCH_KIRKWOOD ||
MACH_KIRKWOOD.

As a consequence of this change, the cpufreq driver is no longer enabled
for ARCH_KIRKWOOD. This patch reinstates ARM_KIRKWOOD_CPUFREQ for
ARCH_KIRKWOOD.

Signed-off-by: Quentin Armitage <quentin@armitage.org.uk>
Acked-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
10 years agoMerge branch 'liblockdep-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git...
Ingo Molnar [Wed, 16 Jul 2014 12:57:27 +0000 (14:57 +0200)]
Merge branch 'liblockdep-fixes' of git://git./linux/kernel/git/sashal/linux into locking/urgent

Pull liblockdep fixes from Sasha Levin.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
10 years agolocking/rwsem: Add CONFIG_RWSEM_SPIN_ON_OWNER
Davidlohr Bueso [Fri, 11 Jul 2014 21:00:06 +0000 (14:00 -0700)]
locking/rwsem: Add CONFIG_RWSEM_SPIN_ON_OWNER

Just like with mutexes (CONFIG_MUTEX_SPIN_ON_OWNER),
encapsulate the dependencies for rwsem optimistic spinning.
No logical changes here as it continues to depend on both
SMP and the XADD algorithm variant.

Signed-off-by: Davidlohr Bueso <davidlohr@hp.com>
Acked-by: Jason Low <jason.low2@hp.com>
[ Also make it depend on ARCH_SUPPORTS_ATOMIC_RMW. ]
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1405112406-13052-2-git-send-email-davidlohr@hp.com
Cc: aswin@hp.com
Cc: Chris Mason <clm@fb.com>
Cc: Davidlohr Bueso <davidlohr@hp.com>
Cc: Josef Bacik <jbacik@fusionio.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Waiman Long <Waiman.Long@hp.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
10 years agolocking/mutex: Disable optimistic spinning on some architectures
Peter Zijlstra [Fri, 6 Jun 2014 17:53:16 +0000 (19:53 +0200)]
locking/mutex: Disable optimistic spinning on some architectures

The optimistic spin code assumes regular stores and cmpxchg() play nice;
this is found to not be true for at least: parisc, sparc32, tile32,
metag-lock1, arc-!llsc and hexagon.

There is further wreckage, but this in particular seemed easy to
trigger, so blacklist this.

Opt in for known good archs.

Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Reported-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: David Miller <davem@davemloft.net>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: James Bottomley <James.Bottomley@hansenpartnership.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Jason Low <jason.low2@hp.com>
Cc: Waiman Long <waiman.long@hp.com>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: Paul McKenney <paulmck@linux.vnet.ibm.com>
Cc: John David Anglin <dave.anglin@bell.net>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Davidlohr Bueso <davidlohr@hp.com>
Cc: stable@vger.kernel.org
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Will Deacon <will.deacon@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: sparclinux@vger.kernel.org
Link: http://lkml.kernel.org/r/20140606175316.GV13930@laptop.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
10 years agolocking/rwsem: Reduce the size of struct rw_semaphore
Jason Low [Mon, 14 Jul 2014 17:27:52 +0000 (10:27 -0700)]
locking/rwsem: Reduce the size of struct rw_semaphore

Recent optimistic spinning additions to rwsem provide significant performance
benefits on many workloads on large machines. The cost of it was increasing
the size of the rwsem structure by up to 128 bits.

However, now that the previous patches in this series bring the overhead of
struct optimistic_spin_queue to 32 bits, this patch reorders some fields in
struct rw_semaphore such that we can reduce the overhead of the rwsem structure
by 64 bits (on 64 bit systems).

The extra overhead required for rwsem optimistic spinning would now be up
to 8 additional bytes instead of up to 16 bytes. Additionally, the size of
rwsem would now be more in line with mutexes.

Signed-off-by: Jason Low <jason.low2@hp.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Scott Norton <scott.norton@hp.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Waiman Long <waiman.long@hp.com>
Cc: Davidlohr Bueso <davidlohr@hp.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Aswin Chandramouleeswaran <aswin@hp.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Chris Mason <clm@fb.com>
Cc: Josef Bacik <jbacik@fusionio.com>
Link: http://lkml.kernel.org/r/1405358872-3732-6-git-send-email-jason.low2@hp.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
10 years agolocking/rwsem: Rename 'activity' to 'count'
Peter Zijlstra [Wed, 16 Jul 2014 12:54:55 +0000 (14:54 +0200)]
locking/rwsem: Rename 'activity' to 'count'

There are two definitions of struct rw_semaphore, one in linux/rwsem.h
and one in linux/rwsem-spinlock.h.

For some reason they have different names for the initial field. This
makes it impossible to use C99 named initialization for
__RWSEM_INITIALIZER() -- or we have to duplicate that entire thing
along with the structure definitions.

The simpler patch is renaming the rwsem-spinlock variant to match the
regular rwsem.

This allows us to switch to C99 named initialization.

Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/n/tip-bmrZolsbGmautmzrerog27io@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
10 years agocpufreq: imx6q: Select PM_OPP
Nicolas Del Piano [Sun, 13 Jul 2014 21:59:00 +0000 (18:59 -0300)]
cpufreq: imx6q: Select PM_OPP

PM_OPP is a library used by several of the existing cpufreq drivers.
ARM IMX6Q cpufreq driver uses this library for its functionality.
Thus, it should be selected in Kconfig.

Reported-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Nicolas Del Piano <ndel314@gmail.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
10 years agocpufreq: sa1110: set memory type for h3600
Linus Walleij [Sat, 12 Jul 2014 09:43:33 +0000 (11:43 +0200)]
cpufreq: sa1110: set memory type for h3600

The Compaq iPAQ h3600 also has the K4S281632b-1H memory type.
Verified by prying apart a broken board.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
10 years agoACPI / video: Add use_native_backlight quirk for HP ProBook 4540s
Hans de Goede [Wed, 16 Jul 2014 11:28:34 +0000 (13:28 +0200)]
ACPI / video: Add use_native_backlight quirk for HP ProBook 4540s

As reported here:
https://bugzilla.redhat.com/show_bug.cgi?id=1025690
This is yet another model which needs this quirk.

Link: https://bugzilla.redhat.com/show_bug.cgi?id=1025690
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
10 years agosched: Fix possible divide by zero in avg_atom() calculation
Mateusz Guzik [Sat, 14 Jun 2014 13:00:09 +0000 (15:00 +0200)]
sched: Fix possible divide by zero in avg_atom() calculation

proc_sched_show_task() does:

  if (nr_switches)
do_div(avg_atom, nr_switches);

nr_switches is unsigned long and do_div truncates it to 32 bits, which
means it can test non-zero on e.g. x86-64 and be truncated to zero for
division.

Fix the problem by using div64_ul() instead.

As a side effect calculations of avg_atom for big nr_switches are now correct.

Signed-off-by: Mateusz Guzik <mguzik@redhat.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: stable@vger.kernel.org
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1402750809-31991-1-git-send-email-mguzik@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
10 years agolocking/spinlocks/mcs: Micro-optimize osq_unlock()
Jason Low [Mon, 14 Jul 2014 17:27:51 +0000 (10:27 -0700)]
locking/spinlocks/mcs: Micro-optimize osq_unlock()

In the unlock function of the cancellable MCS spinlock, the first
thing we do is to retrive the current CPU's osq node. However, due to
the changes made in the previous patch, in the common case where the
lock is not contended, we wouldn't need to access the current CPU's
osq node anymore.

This patch optimizes this by only retriving this CPU's osq node
after we attempt the initial cmpxchg to unlock the osq and found
that its contended.

Signed-off-by: Jason Low <jason.low2@hp.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Scott Norton <scott.norton@hp.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Waiman Long <waiman.long@hp.com>
Cc: Davidlohr Bueso <davidlohr@hp.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Aswin Chandramouleeswaran <aswin@hp.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1405358872-3732-5-git-send-email-jason.low2@hp.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
10 years agolocking/spinlocks/mcs: Introduce and use init macro and function for osq locks
Jason Low [Mon, 14 Jul 2014 17:27:50 +0000 (10:27 -0700)]
locking/spinlocks/mcs: Introduce and use init macro and function for osq locks

Currently, we initialize the osq lock by directly setting the lock's values. It
would be preferable if we use an init macro to do the initialization like we do
with other locks.

This patch introduces and uses a macro and function for initializing the osq lock.

Signed-off-by: Jason Low <jason.low2@hp.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Scott Norton <scott.norton@hp.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Waiman Long <waiman.long@hp.com>
Cc: Davidlohr Bueso <davidlohr@hp.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Aswin Chandramouleeswaran <aswin@hp.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Chris Mason <clm@fb.com>
Cc: Josef Bacik <jbacik@fusionio.com>
Link: http://lkml.kernel.org/r/1405358872-3732-4-git-send-email-jason.low2@hp.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
10 years agolocking/spinlocks/mcs: Convert osq lock to atomic_t to reduce overhead
Jason Low [Mon, 14 Jul 2014 17:27:49 +0000 (10:27 -0700)]
locking/spinlocks/mcs: Convert osq lock to atomic_t to reduce overhead

The cancellable MCS spinlock is currently used to queue threads that are
doing optimistic spinning. It uses per-cpu nodes, where a thread obtaining
the lock would access and queue the local node corresponding to the CPU that
it's running on. Currently, the cancellable MCS lock is implemented by using
pointers to these nodes.

In this patch, instead of operating on pointers to the per-cpu nodes, we
store the CPU numbers in which the per-cpu nodes correspond to in atomic_t.
A similar concept is used with the qspinlock.

By operating on the CPU # of the nodes using atomic_t instead of pointers
to those nodes, this can reduce the overhead of the cancellable MCS spinlock
by 32 bits (on 64 bit systems).

Signed-off-by: Jason Low <jason.low2@hp.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Scott Norton <scott.norton@hp.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Waiman Long <waiman.long@hp.com>
Cc: Davidlohr Bueso <davidlohr@hp.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Aswin Chandramouleeswaran <aswin@hp.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Chris Mason <clm@fb.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Josef Bacik <jbacik@fusionio.com>
Link: http://lkml.kernel.org/r/1405358872-3732-3-git-send-email-jason.low2@hp.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
10 years agolocking/spinlocks/mcs: Rename optimistic_spin_queue() to optimistic_spin_node()
Jason Low [Mon, 14 Jul 2014 17:27:48 +0000 (10:27 -0700)]
locking/spinlocks/mcs: Rename optimistic_spin_queue() to optimistic_spin_node()

Currently, the per-cpu nodes structure for the cancellable MCS spinlock is
named "optimistic_spin_queue". However, in a follow up patch in the series
we will be introducing a new structure that serves as the new "handle" for
the lock. It would make more sense if that structure is named
"optimistic_spin_queue". Additionally, since the current use of the
"optimistic_spin_queue" structure are  "nodes", it might be better if we
rename them to "node" anyway.

This preparatory patch renames all current "optimistic_spin_queue"
to "optimistic_spin_node".

Signed-off-by: Jason Low <jason.low2@hp.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Scott Norton <scott.norton@hp.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Waiman Long <waiman.long@hp.com>
Cc: Davidlohr Bueso <davidlohr@hp.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Aswin Chandramouleeswaran <aswin@hp.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Chris Mason <clm@fb.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Josef Bacik <jbacik@fusionio.com>
Link: http://lkml.kernel.org/r/1405358872-3732-2-git-send-email-jason.low2@hp.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
10 years agolocking/rwsem: Allow conservative optimistic spinning when readers have lock
Jason Low [Sat, 5 Jul 2014 03:49:32 +0000 (20:49 -0700)]
locking/rwsem: Allow conservative optimistic spinning when readers have lock

Commit 4fc828e24cd9 ("locking/rwsem: Support optimistic spinning")
introduced a major performance regression for workloads such as
xfs_repair which mix read and write locking of the mmap_sem across
many threads. The result was xfs_repair ran 5x slower on 3.16-rc2
than on 3.15 and using 20x more system CPU time.

Perf profiles indicate in some workloads that significant time can
be spent spinning on !owner. This is because we don't set the lock
owner when readers(s) obtain the rwsem.

In this patch, we'll modify rwsem_can_spin_on_owner() such that we'll
return false if there is no lock owner. The rationale is that if we
just entered the slowpath, yet there is no lock owner, then there is
a possibility that a reader has the lock. To be conservative, we'll
avoid spinning in these situations.

This patch reduced the total run time of the xfs_repair workload from
about 4 minutes 24 seconds down to approximately 1 minute 26 seconds,
back to close to the same performance as on 3.15.

Retesting of AIM7, which were some of the workloads used to test the
original optimistic spinning code, confirmed that we still get big
performance gains with optimistic spinning, even with this additional
regression fix. Davidlohr found that while the 'custom' workload took
a performance hit of ~-14% to throughput for >300 users with this
additional patch, the overall gain with optimistic spinning is
still ~+45%. The 'disk' workload even improved by ~+15% at >1000 users.

Tested-by: Dave Chinner <dchinner@redhat.com>
Acked-by: Davidlohr Bueso <davidlohr@hp.com>
Signed-off-by: Jason Low <jason.low2@hp.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1404532172.2572.30.camel@j-VirtualBox
Signed-off-by: Ingo Molnar <mingo@kernel.org>
10 years agox86: Remove unused variable "polling"
Paul Bolle [Mon, 30 Jun 2014 14:32:29 +0000 (16:32 +0200)]
x86: Remove unused variable "polling"

Compile tested. "polling" is unused since commit f80c5b39b80a
("sched/idle, x86: Switch from TS_POLLING to TIF_POLLING_NRFLAG").

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Jiri Kosina <jkosina@suse.cz>
Link: http://lkml.kernel.org/r/1404138749.2978.6.camel@x41
Signed-off-by: Ingo Molnar <mingo@kernel.org>
10 years agoUBI: fastmap: do not miss bit-flips
Brian Norris [Wed, 21 May 2014 05:35:38 +0000 (22:35 -0700)]
UBI: fastmap: do not miss bit-flips

The return value from 'ubi_io_read_ec_hdr()' was stored in 'err', not in 'ret'.
This fix makes sure Fastmap-enabled UBI does not miss bit-flip while reading EC
headers, events and scrubs the affected PEBs.

This issue was reported by Coverity Scan.

Artem: improved the commit message.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
10 years agoMerge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Linus Torvalds [Wed, 16 Jul 2014 03:47:42 +0000 (17:47 -1000)]
Merge branch 'for_linus' of git://git./linux/kernel/git/jack/linux-fs

Pull quota fix from Jan Kara:
 "Fix locking of dquot shrinker"

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  quota: missing lock in dqcache_shrink_scan()

10 years agoMerge tag 'gpio-v3.16-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw...
Linus Torvalds [Wed, 16 Jul 2014 03:46:51 +0000 (17:46 -1000)]
Merge tag 'gpio-v3.16-3' of git://git./linux/kernel/git/linusw/linux-gpio

Pull GPIO fix from Linus Walleij:
 "Fix up some merge confusion from the merge window"

* tag 'gpio-v3.16-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
  gpio: mcp23s08: Eliminates redundant checking.

10 years agoring-buffer: Fix polling on trace_pipe
Martin Lau [Tue, 10 Jun 2014 06:06:42 +0000 (23:06 -0700)]
ring-buffer: Fix polling on trace_pipe

ring_buffer_poll_wait() should always put the poll_table to its wait_queue
even there is immediate data available.  Otherwise, the following epoll and
read sequence will eventually hang forever:

1. Put some data to make the trace_pipe ring_buffer read ready first
2. epoll_ctl(efd, EPOLL_CTL_ADD, trace_pipe_fd, ee)
3. epoll_wait()
4. read(trace_pipe_fd) till EAGAIN
5. Add some more data to the trace_pipe ring_buffer
6. epoll_wait() -> this epoll_wait() will block forever

~ During the epoll_ctl(efd, EPOLL_CTL_ADD,...) call in step 2,
  ring_buffer_poll_wait() returns immediately without adding poll_table,
  which has poll_table->_qproc pointing to ep_poll_callback(), to its
  wait_queue.
~ During the epoll_wait() call in step 3 and step 6,
  ring_buffer_poll_wait() cannot add ep_poll_callback() to its wait_queue
  because the poll_table->_qproc is NULL and it is how epoll works.
~ When there is new data available in step 6, ring_buffer does not know
  it has to call ep_poll_callback() because it is not in its wait queue.
  Hence, block forever.

Other poll implementation seems to call poll_wait() unconditionally as the very
first thing to do.  For example, tcp_poll() in tcp.c.

Link: http://lkml.kernel.org/p/20140610060637.GA14045@devbig242.prn2.facebook.com
Cc: stable@vger.kernel.org # 2.6.27
Fixes: 2a2cc8f7c4d0 "ftrace: allow the event pipe to be polled"
Reviewed-by: Chris Mason <clm@fb.com>
Signed-off-by: Martin Lau <kafai@fb.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
10 years agoquota: missing lock in dqcache_shrink_scan()
Niu Yawei [Wed, 4 Jun 2014 04:22:13 +0000 (12:22 +0800)]
quota: missing lock in dqcache_shrink_scan()

Commit 1ab6c4997e04 (fs: convert fs shrinkers to new scan/count API)
accidentally removed locking from quota shrinker. Fix it -
dqcache_shrink_scan() should use dq_list_lock to protect the
scan on free_dquots list.

CC: stable@vger.kernel.org
Fixes: 1ab6c4997e04a00c50c6d786c2f046adc0d1f5de
Signed-off-by: Niu Yawei <yawei.niu@intel.com>
Signed-off-by: Jan Kara <jack@suse.cz>
10 years agodm cache metadata: do not allow the data block size to change
Mike Snitzer [Mon, 14 Jul 2014 20:59:39 +0000 (16:59 -0400)]
dm cache metadata: do not allow the data block size to change

The block size for the dm-cache's data device must remained fixed for
the life of the cache.  Disallow any attempt to change the cache's data
block size.

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Acked-by: Joe Thornber <ejt@redhat.com>
Cc: stable@vger.kernel.org
10 years agodm thin metadata: do not allow the data block size to change
Mike Snitzer [Mon, 14 Jul 2014 20:35:54 +0000 (16:35 -0400)]
dm thin metadata: do not allow the data block size to change

The block size for the thin-pool's data device must remained fixed for
the life of the thin-pool.  Disallow any attempt to change the
thin-pool's data block size.

It should be noted that attempting to change the data block size via
thin-pool table reload will be ignored as a side-effect of the thin-pool
handover that the thin-pool target does during thin-pool table reload.

Here is an example outcome of attempting to load a thin-pool table that
reduced the thin-pool's data block size from 1024K to 512K.

Before:
kernel: device-mapper: thin: 253:4: growing the data device from 204800 to 409600 blocks

After:
kernel: device-mapper: thin metadata: changing the data block size (from 2048 to 1024) is not supported
kernel: device-mapper: table: 253:4: thin-pool: Error creating metadata object
kernel: device-mapper: ioctl: error adding target to table

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Acked-by: Joe Thornber <ejt@redhat.com>
Cc: stable@vger.kernel.org
10 years agotracing: Add TRACE_ITER_PRINTK flag check in __trace_puts/__trace_bputs
zhangwei(Jovi) [Thu, 18 Jul 2013 08:31:18 +0000 (16:31 +0800)]
tracing: Add TRACE_ITER_PRINTK flag check in __trace_puts/__trace_bputs

The TRACE_ITER_PRINTK check in __trace_puts/__trace_bputs is missing,
so add it, to be consistent with __trace_printk/__trace_bprintk.
Those functions are all called by the same function: trace_printk().

Link: http://lkml.kernel.org/p/51E7A7D6.8090900@huawei.com
Cc: stable@vger.kernel.org # 3.11+
Signed-off-by: zhangwei(Jovi) <jovi.zhangwei@huawei.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
10 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi...
Linus Torvalds [Tue, 15 Jul 2014 15:57:17 +0000 (08:57 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/mszeredi/fuse

Pull fuse fixes from Miklos Szeredi:
 "This contains miscellaneous fixes"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
  fuse: replace count*size kzalloc by kcalloc
  fuse: release temporary page if fuse_writepage_locked() failed
  fuse: restructure ->rename2()
  fuse: avoid scheduling while atomic
  fuse: handle large user and group ID
  fuse: inode: drop cast
  fuse: ignore entry-timeout on LOOKUP_REVAL
  fuse: timeout comparison fix

10 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Linus Torvalds [Tue, 15 Jul 2014 15:42:52 +0000 (08:42 -0700)]
Merge git://git./linux/kernel/git/davem/net

Pull networking fixes from David Miller:

 1) Bluetooth pairing fixes from Johan Hedberg.

 2) ieee80211_send_auth() doesn't allocate enough tail room for the SKB,
    from Max Stepanov.

 3) New iwlwifi chip IDs, from Oren Givon.

 4) bnx2x driver reads wrong PCI config space MSI register, from Yijing
    Wang.

 5) IPV6 MLD Query validation isn't strong enough, from Hangbin Liu.

 6) Fix double SKB free in openvswitch, from Andy Zhou.

 7) Fix sk_dst_set() being racey with UDP sockets, leading to strange
    crashes, from Eric Dumazet.

 8) Interpret the NAPI budget correctly in the new systemport driver,
    from Florian Fainelli.

 9) VLAN code frees percpu stats in the wrong place, leading to crashes
    in the get stats handler.  From Eric Dumazet.

10) TCP sockets doing a repair can crash with a divide by zero, because
    we invoke tcp_push() with an MSS value of zero.  Just skip that part
    of the sendmsg paths in repair mode.  From Christoph Paasch.

11) IRQ affinity bug fixes in mlx4 driver from Amir Vadai.

12) Don't ignore path MTU icmp messages with a zero mtu, machines out
    there still spit them out, and all of our per-protocol handlers for
    PMTU can cope with it just fine.  From Edward Allcutt.

13) Some NETDEV_CHANGE notifier invocations were not passing in the
    correct kind of cookie as the argument, from Loic Prylli.

14) Fix crashes in long multicast/broadcast reassembly, from Jon Paul
    Maloy.

15) ip_tunnel_lookup() doesn't interpret wildcard keys correctly, fix
    from Dmitry Popov.

16) Fix skb->sk assigned without taking a reference to 'sk' in
    appletalk, from Andrey Utkin.

17) Fix some info leaks in ULP event signalling to userspace in SCTP,
    from Daniel Borkmann.

18) Fix deadlocks in HSO driver, from Olivier Sobrie.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (93 commits)
  hso: fix deadlock when receiving bursts of data
  hso: remove unused workqueue
  net: ppp: don't call sk_chk_filter twice
  mlx4: mark napi id for gro_skb
  bonding: fix ad_select module param check
  net: pppoe: use correct channel MTU when using Multilink PPP
  neigh: sysctl - simplify address calculation of gc_* variables
  net: sctp: fix information leaks in ulpevent layer
  MAINTAINERS: update r8169 maintainer
  net: bcmgenet: fix RGMII_MODE_EN bit
  tipc: clear 'next'-pointer of message fragments before reassembly
  r8152: fix r8152_csum_workaround function
  be2net: set EQ DB clear-intr bit in be_open()
  GRE: enable offloads for GRE
  farsync: fix invalid memory accesses in fst_add_one() and fst_init_card()
  igb: do a reset on SR-IOV re-init if device is down
  igb: Workaround for i210 Errata 25: Slow System Clock
  usbnet: smsc95xx: add reset_resume function with reset operation
  dp83640: Always decode received status frames
  r8169: disable L23
  ...

10 years agotracing: Fix graph tracer with stack tracer on other archs
Steven Rostedt (Red Hat) [Tue, 15 Jul 2014 15:05:12 +0000 (11:05 -0400)]
tracing: Fix graph tracer with stack tracer on other archs

Running my ftrace tests on PowerPC, it failed the test that checks
if function_graph tracer is affected by the stack tracer. It was.
Looking into this, I found that the update_function_graph_func()
must be called even if the trampoline function is not changed.
This is because archs like PowerPC do not support ftrace_ops being
passed by assembly and instead uses a helper function (what the
trampoline function points to). Since this function is not changed
even when multiple ftrace_ops are added to the code, the test that
falls out before calling update_function_graph_func() will miss that
the update must still be done.

Call update_function_graph_function() for all calls to
update_ftrace_function()

Cc: stable@vger.kernel.org # 3.3+
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
10 years agotracing: Add ftrace_trace_stack into __trace_puts/__trace_bputs
zhangwei(Jovi) [Thu, 18 Jul 2013 08:31:05 +0000 (16:31 +0800)]
tracing: Add ftrace_trace_stack into __trace_puts/__trace_bputs

Currently trace option stacktrace is not applicable for
trace_printk with constant string argument, the reason is
in __trace_puts/__trace_bputs ftrace_trace_stack is missing.

In contrast, when using trace_printk with non constant string
argument(will call into __trace_printk/__trace_bprintk), then
trace option stacktrace is workable, this inconstant result
will confuses users a lot.

Link: http://lkml.kernel.org/p/51E7A7C9.9040401@huawei.com
Cc: stable@vger.kernel.org # 3.10+
Signed-off-by: zhangwei(Jovi) <jovi.zhangwei@huawei.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
10 years agoALSA: hda - Fix broken PM due to incomplete i915 initialization
Takashi Iwai [Tue, 15 Jul 2014 13:19:43 +0000 (15:19 +0200)]
ALSA: hda - Fix broken PM due to incomplete i915 initialization

When the initialization of Intel HDMI controller fails due to missing
i915 kernel symbols (e.g. HD-audio is built in while i915 is module),
the driver discontinues the probe.  However, since the probe was done
asynchronously, the driver object still remains, thus the relevant PM
ops are still called at suspend/resume. This results in the bad access
to the incomplete audio card object, eventually leads to Oops or stall
at PM.

This patch adds the missing checks of chip->init_failed flag at each
PM callback in order to fix the problem above.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=79561
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
10 years agoPM / sleep: fix freeze_ops NULL pointer dereferences
Zhang Rui [Tue, 15 Jul 2014 12:26:13 +0000 (14:26 +0200)]
PM / sleep: fix freeze_ops NULL pointer dereferences

This patch fixes a NULL pointer dereference issue introduced by
commit 1f0b63866fc1 (ACPI / PM: Hold ACPI scan lock over the "freeze"
sleep state).

Fixes: 1f0b63866fc1 (ACPI / PM: Hold ACPI scan lock over the "freeze" sleep state)
Link: http://marc.info/?l=linux-pm&m=140541182017443&w=2
Reported-and-tested-by: Alexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
10 years agoPM / sleep: Fix request_firmware() error at resume
Takashi Iwai [Tue, 15 Jul 2014 06:51:27 +0000 (08:51 +0200)]
PM / sleep: Fix request_firmware() error at resume

The commit [247bc037: PM / Sleep: Mitigate race between the freezer
and request_firmware()] introduced the finer state control, but it
also leads to a new bug; for example, a bug report regarding the
firmware loading of intel BT device at suspend/resume:
  https://bugzilla.novell.com/show_bug.cgi?id=873790

The root cause seems to be a small window between the process resume
and the clear of usermodehelper lock.  The request_firmware() function
checks the UMH lock and gives up when it's in UMH_DISABLE state.  This
is for avoiding the invalid  f/w loading during suspend/resume phase.
The problem is, however, that usermodehelper_enable() is called at the
end of thaw_processes().  Thus, a thawed process in between can kick
off the f/w loader code path (in this case, via btusb_setup_intel())
even before the call of usermodehelper_enable().  Then
usermodehelper_read_trylock() returns an error and request_firmware()
spews WARN_ON() in the end.

This oneliner patch fixes the issue just by setting to UMH_FREEZING
state again before restarting tasks, so that the call of
request_firmware() will be blocked until the end of this function
instead of returning an error.

Fixes: 247bc0374254 (PM / Sleep: Mitigate race between the freezer and request_firmware())
Link: https://bugzilla.novell.com/show_bug.cgi?id=873790
Cc: 3.4+ <stable@vger.kernel.org> # 3.4+
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
10 years agoMerge branch 'linux-3.16' of git://anongit.freedesktop.org/git/nouveau/linux-2.6...
Dave Airlie [Tue, 15 Jul 2014 03:25:58 +0000 (13:25 +1000)]
Merge branch 'linux-3.16' of git://anongit.freedesktop.org/git/nouveau/linux-2.6 into drm-fixes

deadlock fix.

* 'linux-3.16' of git://anongit.freedesktop.org/git/nouveau/linux-2.6:
  drm/nouveau/therm: fix a potential deadlock in the therm monitoring code

10 years agodrm/nouveau/therm: fix a potential deadlock in the therm monitoring code
Martin Peres [Mon, 14 Jul 2014 09:12:56 +0000 (11:12 +0200)]
drm/nouveau/therm: fix a potential deadlock in the therm monitoring code

Signed-off-by: Martin Peres <martin.peres@free.fr>
Tested-by: Stefan Ringel <mail@stefanringel.de>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
10 years agohso: fix deadlock when receiving bursts of data
Olivier Sobrie [Mon, 14 Jul 2014 10:08:50 +0000 (12:08 +0200)]
hso: fix deadlock when receiving bursts of data

When the module sends bursts of data, sometimes a deadlock happens in
the hso driver when the tty buffer doesn't get the chance to be flushed
quickly enough.

Remove the endless while loop in function put_rxbuf_data() which is
called by the urb completion handler.
If there isn't enough room in the tty buffer, discards all the data
received in the URB.

Cc: David Miller <davem@davemloft.net>
Cc: David Laight <David.Laight@ACULAB.COM>
Cc: One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>
Cc: Dan Williams <dcbw@redhat.com>
Cc: Jan Dumon <j.dumon@option.com>
Signed-off-by: Olivier Sobrie <olivier@sobrie.be>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
10 years agohso: remove unused workqueue
Olivier Sobrie [Mon, 14 Jul 2014 10:08:49 +0000 (12:08 +0200)]
hso: remove unused workqueue

The workqueue "retry_unthrottle_workqueue" is not scheduled anywhere
in the code. So, remove it.

Signed-off-by: Olivier Sobrie <olivier@sobrie.be>
Signed-off-by: David S. Miller <davem@davemloft.net>