openwrt/staging/blogic.git
8 years agoMerge branches 'acpi-numa', 'acpi-tables' and 'acpi-osi'
Rafael J. Wysocki [Mon, 16 May 2016 14:45:25 +0000 (16:45 +0200)]
Merge branches 'acpi-numa', 'acpi-tables' and 'acpi-osi'

* acpi-numa:
  ACPI / SRAT: fix SRAT parsing order with both LAPIC and X2APIC present

* acpi-tables:
  ACPI / tables: Fix DSDT override mechanism
  ACPI / tables: Convert initrd table override to table upgrade mechanism
  ACPI / x86: Cleanup initrd related code
  ACPI / tables: Move table override mechanisms to tables.c

* acpi-osi:
  ACPI / osi: Collect _OSI handling into one single file
  ACPI / osi: Cleanup coding style issues before creating a separate OSI source file
  ACPI / osi: Cleanup OSI handling code to use bool
  ACPI / osi: Fix default _OSI(Darwin) support
  ACPI / osi: Add acpi_osi=!! to allow reverting acpi_osi=!
  ACPI / osi: Cleanup _OSI("Linux") related code before introducing new support
  ACPI / osi: Fix an issue that acpi_osi=!* cannot disable ACPICA internal strings

Conflicts:
drivers/acpi/internal.h

8 years agoMerge branches 'acpi-drivers', 'acpi-pm', 'acpi-ec' and 'acpi-video'
Rafael J. Wysocki [Mon, 16 May 2016 14:44:41 +0000 (16:44 +0200)]
Merge branches 'acpi-drivers', 'acpi-pm', 'acpi-ec' and 'acpi-video'

* acpi-drivers:
  ACPI / GED: make evged.c explicitly non-modular
  ACPI / amba: Remove CLK_IS_ROOT
  ACPI / APD: Remove CLK_IS_ROOT
  ACPI: implement Generic Event Device

* acpi-pm:
  ACPI / PM: Introduce efi poweroff for HW-full platforms without _S5

* acpi-ec:
  ACPI 2.0 / AML: Improve module level execution by moving the If/Else/While execution to per-table basis
  ACPI 2.0 / ECDT: Enable correct ECDT initialization order
  ACPI 2.0 / ECDT: Remove early namespace reference from EC
  ACPI 2.0 / ECDT: Split EC_FLAGS_HANDLERS_INSTALLED

* acpi-video:
  ACPI / video: mark acpi_video_get_levels() inline
  Thermal / ACPI / video: add INT3406 thermal driver
  ACPI/video: export acpi_video_get_levels
  video / backlight: remove the backlight_device_registered API
  video / backlight: add two APIs for drivers to use

8 years agoMerge branch 'acpica'
Rafael J. Wysocki [Mon, 16 May 2016 14:44:15 +0000 (16:44 +0200)]
Merge branch 'acpica'

* acpica: (41 commits)
  ACPICA: Update version to 20160422
  ACPICA: Move all ASCII utilities to a common file
  ACPICA: ACPI 2.0, Hardware: Add access_width/bit_offset support for acpi_hw_write()
  ACPICA: ACPI 2.0, Hardware: Add access_width/bit_offset support in acpi_hw_read()
  ACPICA: Executer: Introduce a set of macros to handle bit width mask generation
  ACPICA: Hardware: Add optimized access bit width support
  ACPICA: Utilities: Add ACPI_IS_ALIGNED() macro
  ACPICA: Renamed some #defined flag constants for clarity
  ACPICA: ACPI 6.0, tools/iasl: Add support for new resource descriptors
  ACPICA: ACPI 6.0: Update _BIX support for new package element
  ACPICA: ACPI 6.1: Support for new PCCT subtable
  ACPICA: Refactor evaluate_object to reduce nesting
  ACPICA: Divergence: remove unwanted spaces for typedef
  ACPICA: Update version to 20160318
  ACPICA: Namespace: Reorder \_SB._INI to make sure it is evaluated before _REG evaluations
  ACPICA: Events: Fix an issue that _REG association can happen before namespace is initialized
  ACPICA: Tables: Fix wrong MLC condition for dynamic table loading
  ACPICA: Interpreter: Fix wrong conditions for acpi_ev_install_region_handlers() invocation
  ACPICA: Hardware: Enhance acpi_hw_validate_register() with access_width/bit_offset awareness
  Utilities: Fix missing parentheses in ACPI_GET_BITS()/ACPI_SET_BITS()
  ...

8 years agoACPI / video: mark acpi_video_get_levels() inline
Arnd Bergmann [Thu, 12 May 2016 21:00:12 +0000 (23:00 +0200)]
ACPI / video: mark acpi_video_get_levels() inline

A recent patch added a stub function for acpi_video_get_levels when
CONFIG_ACPI_VIDEO is disabled. However, this is marked as 'static'
and causes a warning about an unused function whereever the header
gets included:

In file included from ../drivers/gpu/drm/radeon/radeon_acpi.c:28:0:
include/acpi/video.h:74:12: error: 'acpi_video_get_levels' defined but not used [-Werror=unused-function]

This makes the declaration 'static inline', which gets rid of the
warning.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 059500940def (ACPI/video: export acpi_video_get_levels)
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
8 years agoThermal / ACPI / video: add INT3406 thermal driver
Aaron Lu [Mon, 9 May 2016 07:54:58 +0000 (15:54 +0800)]
Thermal / ACPI / video: add INT3406 thermal driver

INT3406 ACPI device object resembles an ACPI video output device, but its
_BCM is said to be deprecated and should not be used. So we will make
use of the raw interface to do the actual cooling.

Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Acked-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
8 years agoACPI / GED: make evged.c explicitly non-modular
Paul Gortmaker [Mon, 9 May 2016 18:40:27 +0000 (14:40 -0400)]
ACPI / GED: make evged.c explicitly non-modular

The Makefile/Kconfig currently controlling compilation of this code is:

Makefile:acpi-$(CONFIG_ACPI_REDUCED_HARDWARE_ONLY) += evged.o

drivers/acpi/Kconfig:config ACPI_REDUCED_HARDWARE_ONLY
drivers/acpi/Kconfig:   bool "Hardware-reduced ACPI support only" if EXPERT

...meaning that it currently is not being built as a module by anyone.

Lets remove the couple traces of modularity so that when reading the
code there is no doubt it is builtin-only.

Since module_platform_driver() uses the same init level priority as
builtin_platform_driver() the init ordering remains unchanged with
this commit.

The file wasn't explicitly including the module.h file but it did
already have init.h so, unlike similar changes, this one has no
header changes at all.

We also delete the MODULE_LICENSE tag since all that information
is already contained at the top of the file in the comments.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
8 years agoLinux 4.6-rc7
Linus Torvalds [Sun, 8 May 2016 21:38:32 +0000 (14:38 -0700)]
Linux 4.6-rc7

8 years agoMerge tag 'char-misc-4.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
Linus Torvalds [Sat, 7 May 2016 17:53:32 +0000 (10:53 -0700)]
Merge tag 'char-misc-4.6-rc7' of git://git./linux/kernel/git/gregkh/char-misc

Pull misc driver fixes from Gfreg KH:
 "Here are three small fixes for some driver problems that were
  reported.  Full details in the shortlog below.

  All of these have been in linux-next with no reported issues"

* tag 'char-misc-4.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  nvmem: mxs-ocotp: fix buffer overflow in read
  Drivers: hv: vmbus: Fix signaling logic in hv_need_to_signal_on_read()
  misc: mic: Fix for double fetch security bug in VOP driver

8 years agoMerge tag 'staging-4.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
Linus Torvalds [Sat, 7 May 2016 17:50:48 +0000 (10:50 -0700)]
Merge tag 'staging-4.6-rc7' of git://git./linux/kernel/git/gregkh/staging

Pull IIO driver fixes from Grek KH:
 "It's really just IIO drivers here, some small fixes that resolve some
  'crash on boot' errors that have shown up in the -rc series, and other
  bugfixes that are required.

  All have been in linux-next with no reported problems"

* tag 'staging-4.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
  iio: imu: mpu6050: Fix name/chip_id when using ACPI
  iio: imu: mpu6050: fix possible NULL dereferences
  iio:adc:at91-sama5d2: Repair crash on module removal
  iio: ak8975: fix maybe-uninitialized warning
  iio: ak8975: Fix NULL pointer exception on early interrupt

8 years agoMerge tag 'usb-4.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Linus Torvalds [Sat, 7 May 2016 17:47:03 +0000 (10:47 -0700)]
Merge tag 'usb-4.6-rc7' of git://git./linux/kernel/git/gregkh/usb

Pull USB fixes from Greg KH:
 "Here are some last-remaining fixes for USB drivers to resolve issues
  that have shown up in testing.  And two new device ids as well.

  All of these have been in linux-next with no reported issues"

* tag 'usb-4.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  Revert "USB / PM: Allow USB devices to remain runtime-suspended when sleeping"
  usb: musb: jz4740: fix error check of usb_get_phy()
  Revert "usb: musb: musb_host: Enable HCD_BH flag to handle urb return in bottom half"
  usb: musb: gadget: nuke endpoint before setting its descriptor to NULL
  USB: serial: cp210x: add Straizona Focusers device ids
  USB: serial: cp210x: add ID for Link ECU

8 years agoMerge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm
Linus Torvalds [Sat, 7 May 2016 15:27:35 +0000 (08:27 -0700)]
Merge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm

Pull ARM fixes from Russell King:
 "These are a number of updates to fix a few problems found in the ARM
  nommu code over the last couple of years, caused mostly by changes on
  the mmu side"

* 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: 8573/1: domain: move {set,get}_domain under config guard
  ARM: 8572/1: nommu: change memory reserve for the vectors
  ARM: 8571/1: nommu: fix PMSAv7 setup

8 years agoMerge tag 'media/v4.6-5' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
Linus Torvalds [Sat, 7 May 2016 15:17:45 +0000 (08:17 -0700)]
Merge tag 'media/v4.6-5' of git://git./linux/kernel/git/mchehab/linux-media

Pull media fixes from Mauro Carvalho Chehab:

  - deadlock fixes on driver probe at exynos4-is and s43-camif drivers

  - a build breakage if media controller is enabled and USB or PCI is
   built as module.

* tag 'media/v4.6-5' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
  [media] media-device: fix builds when USB or PCI is compiled as module
  [media] media: s3c-camif: fix deadlock on driver probe()
  [media] media: exynos4-is: fix deadlock on driver probe

8 years agoMerge branch 'for-4.6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj...
Linus Torvalds [Sat, 7 May 2016 15:13:42 +0000 (08:13 -0700)]
Merge branch 'for-4.6-fixes' of git://git./linux/kernel/git/tj/libata

Pull libata fixes from Tejun Heo:
 "An ahci driver addition and updates to ahci port enable handling for
  some platform devices"

* 'for-4.6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
  ata: add AMD Seattle platform driver
  ARM: dts: apq8064: add ahci ports-implemented mask
  ata: ahci-platform: Add ports-implemented DT bindings.
  libahci: save port map for forced port map

8 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma
Linus Torvalds [Sat, 7 May 2016 15:10:08 +0000 (08:10 -0700)]
Merge tag 'for-linus' of git://git./linux/kernel/git/dledford/rdma

Pull rdma fix from Doug Ledford:
 "Fix for max sector calculation in iSER"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma:
  IB/iser: Fix max_sectors calculation

8 years agoMerge branch 'for-linus' of git://git.kernel.dk/linux-block
Linus Torvalds [Fri, 6 May 2016 20:08:35 +0000 (13:08 -0700)]
Merge branch 'for-linus' of git://git.kernel.dk/linux-block

Pull writeback fix from Jens Axboe:
 "Just a single fix for domain aware writeback, fixing a regression that
  can cause balance_dirty_pages() to keep looping while not getting any
  work done"

* 'for-linus' of git://git.kernel.dk/linux-block:
  writeback: Fix performance regression in wb_over_bg_thresh()

8 years agoMerge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 6 May 2016 19:59:27 +0000 (12:59 -0700)]
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86 fixes from Ingo Molnar:
 "This contains two fixes: a boot fix for older SGI/UV systems, and an
  APIC calibration fix"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/tsc: Read all ratio bits from MSR_PLATFORM_INFO
  x86/platform/UV: Bring back the call to map_low_mmrs in uv_system_init

8 years agoMerge tag 'pm+acpi-4.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...
Linus Torvalds [Fri, 6 May 2016 18:58:45 +0000 (11:58 -0700)]
Merge tag 'pm+acpi-4.6-rc7' of git://git./linux/kernel/git/rafael/linux-pm

Pull power management and ACPI fixes from Rafael Wysocki:
 "Fixes for problems introduced or discovered recently (intel_pstate,
  sti-cpufreq, ARM64 cpuidle, Operating Performance Points framework,
  generic device properties framework) and one fix for a hotplug-related
  deadlock in ACPICA that's been there forever, but is nasty enough.

  Specifics:

   - Fix for a recent regression in the intel_pstate driver causing it
     to fail to restore the HWP (HW-managed P-states) configuration of
     the boot CPU after suspend-to-RAM (Rafael Wysocki).

   - Fix for two recent regressions in the intel_pstate driver, one that
     can trigger a divide by zero if the driver is accessed via sysfs
     before it manages to take the first sample and one causing it to
     fail to update a structure field used in a trace point, so the
     information coming from it is less useful (Rafael Wysocki).

   - Fix for a problem in the sti-cpufreq driver introduced during the
     4.5 cycle that causes it to break CPU PM in multi-platform kernels
     by registering cpufreq-dt (which subsequently doesn't work)
     unconditionally and preventing the driver that would actually work
     from registering (Sudeep Holla).

   - Stable-candidate fix for an ARM64 cpuidle issue causing idle state
     usage counters to be incorrectly updated for idle states that were
     not entered due to errors (James Morse).

   - Fix for a recently introduced issue in the OPP (Operating
     Performance Points) framework causing it to print bogus error
     messages for missing optional regulators (Viresh Kumar).

   - Fix for a recently introduced issue in the generic device
     properties framework that may cause it to attempt to dereferece and
     invalid pointer in some cases (Heikki Krogerus).

   - Fix for a deadlock in the ACPICA core that may be triggered by
     device (eg Thunderbolt) hotplug (Prarit Bhargava)"

* tag 'pm+acpi-4.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  PM / OPP: Remove useless check
  ACPICA: Dispatcher: Update thread ID for recursive method calls
  intel_pstate: Fix intel_pstate_get()
  cpufreq: intel_pstate: Fix HWP on boot CPU after system resume
  cpufreq: st: enable selective initialization based on the platform
  ARM: cpuidle: Pass on arm_cpuidle_suspend()'s return value
  device property: Avoid potential dereferences of invalid pointers

8 years agoMerge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 6 May 2016 18:53:27 +0000 (11:53 -0700)]
Merge branch 'sched-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull scheduler fix from Ingo Molnar:
 "This contains a single fix that fixes a nohz tick stopping bug when
  mixed-poliocy SCHED_FIFO and SCHED_RR tasks are present on a runqueue"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  nohz/full, sched/rt: Fix missed tick-reenabling bug in sched_can_stop_tick()

8 years agoMerge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 6 May 2016 18:40:24 +0000 (11:40 -0700)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull perf fixes from Ingo Molnar:
 "This tree contains two fixes: new Intel CPU model numbers and an
  AMD/iommu uncore PMU driver fix"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86/amd/iommu: Do not register a task ctx for uncore like PMUs
  perf/x86: Add model numbers for Kabylake CPUs

8 years agoMerge branch 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 6 May 2016 18:33:02 +0000 (11:33 -0700)]
Merge branch 'efi-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull EFI fixes from Ingo Molnar:
 "This tree contains three fixes: a console spam fix, a file pattern fix
  and a sysfb_efi fix for a bug that triggered on older ThinkPads"

* 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/sysfb_efi: Fix valid BAR address range check
  x86/efi-bgrt: Switch all pr_err() to pr_notice() for invalid BGRT
  MAINTAINERS: Remove asterisk from EFI directory names

8 years agoMerge branch 'parisc-4.6-5' of git://git.kernel.org/pub/scm/linux/kernel/git/deller...
Linus Torvalds [Fri, 6 May 2016 18:27:05 +0000 (11:27 -0700)]
Merge branch 'parisc-4.6-5' of git://git./linux/kernel/git/deller/parisc-linux

Pull parisc fix from Helge Deller:
 "Patch from Dmitry V Levin to fix a kernel crash when a straced process
  calls the (invalid) syscall which is equal to value of __NR_Linux_syscalls"

* 'parisc-4.6-5' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: fix a bug when syscall number of tracee is __NR_Linux_syscalls

8 years agoMerge tag 'arc-4.6-rc7-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc
Linus Torvalds [Fri, 6 May 2016 18:14:38 +0000 (11:14 -0700)]
Merge tag 'arc-4.6-rc7-fixes' of git://git./linux/kernel/git/vgupta/arc

Pull ARC fixes from Vineet Gupta:
 "Late in the cycle, but this has fixes for couple of issues: a PAE40
  boot crash and Arnd spotting lack of barriers in BE io-accessors.

  The 3rd patch for enabling highmem in low physical mem ;-) honestly is
  more than a "fix" but its been in works for some time, seems to be
  stable in testing and enables 2 of our customers to go forward with
  4.6 kernel.

   - Fix for PTE truncation in PAE40 builds
   - Fix for big endian IO accessors lacking IO barrier
   - Allow HIGHMEM to work with low physical addresses"

* tag 'arc-4.6-rc7-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
  ARC: support HIGHMEM even without PAE40
  ARC: Fix PAE40 boot failures due to PTE truncation
  ARC: Add missing io barriers to io{read,write}{16,32}be()

8 years agoMerge tag 'powerpc-4.6-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc...
Linus Torvalds [Fri, 6 May 2016 18:05:07 +0000 (11:05 -0700)]
Merge tag 'powerpc-4.6-5' of git://git./linux/kernel/git/powerpc/linux

Pull powerpc fix from Michael Ellerman:
 "Fix bad inline asm constraint in create_zero_mask() from Anton
  Blanchard"

* tag 'powerpc-4.6-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc: Fix bad inline asm constraint in create_zero_mask()

8 years agoMerge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Linus Torvalds [Fri, 6 May 2016 17:59:53 +0000 (10:59 -0700)]
Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux

Pull drm fixes from Dave Airlie:
 "Fixes for i915, amdgpu/radeon and imx.

  The IMX fix is for an autoloading regression found in Fedora.  The
  radeon fixes, are the same fix to amdgpu/radeon to avoid a hardware
  lockup in some circumstances with a bad mode, and a double free bug I
  took a few hours chasing down the other morning.

  The i915 fixes are across the board, all stable material, and fixing
  some hangs and suspend/resume issues, along with a live status
  regressions"

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  gpu: ipu-v3: Fix imx-ipuv3-crtc module autoloading
  drm/amdgpu: make sure vertical front porch is at least 1
  drm/radeon: make sure vertical front porch is at least 1
  drm/amdgpu: set metadata pointer to NULL after freeing.
  drm/i915: Make RPS EI/thresholds multiple of 25 on SNB-BDW
  drm/i915: Fake HDMI live status
  drm/i915: Fix eDP low vswing for Broadwell
  drm/i915/ddi: Fix eDP VDD handling during booting and suspend/resume
  drm/i915: Fix system resume if PCI device remained enabled
  drm/i915: Avoid stalling on pending flips for legacy cursor updates

8 years agoparisc: fix a bug when syscall number of tracee is __NR_Linux_syscalls
Dmitry V. Levin [Wed, 27 Apr 2016 01:56:11 +0000 (04:56 +0300)]
parisc: fix a bug when syscall number of tracee is __NR_Linux_syscalls

Do not load one entry beyond the end of the syscall table when the
syscall number of a traced process equals to __NR_Linux_syscalls.
Similar bug with regular processes was fixed by commit 3bb457af4fa8
("[PARISC] Fix bug when syscall nr is __NR_Linux_syscalls").

This bug was found by strace test suite.

Cc: stable@vger.kernel.org
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
Acked-by: Helge Deller <deller@gmx.de>
Signed-off-by: Helge Deller <deller@gmx.de>
8 years agoACPI / tables: Fix DSDT override mechanism
Rafael J. Wysocki [Thu, 5 May 2016 23:27:09 +0000 (01:27 +0200)]
ACPI / tables: Fix DSDT override mechanism

Commit 5ae74f2cc2f1 (ACPI / tables: Move table override mechanisms to
tables.c) forgot to move the CONFIG_ACPI_CUSTOM_DSDT_FILE inclusion
directive from osl.c to tables.c.  Fix that.

Fixes: 5ae74f2cc2f1 (ACPI / tables: Move table override mechanisms to tables.c)
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Lv Zheng <lv.zheng@intel.com>
8 years agoMerge branches 'pm-opp-fixes', 'pm-cpufreq-fixes' and 'pm-cpuidle-fixes'
Rafael J. Wysocki [Fri, 6 May 2016 11:16:22 +0000 (13:16 +0200)]
Merge branches 'pm-opp-fixes', 'pm-cpufreq-fixes' and 'pm-cpuidle-fixes'

* pm-opp-fixes:
  PM / OPP: Remove useless check

* pm-cpufreq-fixes:
  intel_pstate: Fix intel_pstate_get()
  cpufreq: intel_pstate: Fix HWP on boot CPU after system resume
  cpufreq: st: enable selective initialization based on the platform

* pm-cpuidle-fixes:
  ARM: cpuidle: Pass on arm_cpuidle_suspend()'s return value

8 years agoMerge branches 'acpica-fixes' and 'device-properties-fixes'
Rafael J. Wysocki [Fri, 6 May 2016 11:15:52 +0000 (13:15 +0200)]
Merge branches 'acpica-fixes' and 'device-properties-fixes'

* acpica-fixes:
  ACPICA: Dispatcher: Update thread ID for recursive method calls

* device-properties-fixes:
  device property: Avoid potential dereferences of invalid pointers

8 years agox86/tsc: Read all ratio bits from MSR_PLATFORM_INFO
Chen Yu [Fri, 6 May 2016 03:33:39 +0000 (11:33 +0800)]
x86/tsc: Read all ratio bits from MSR_PLATFORM_INFO

Currently we read the tsc radio: ratio = (MSR_PLATFORM_INFO >> 8) & 0x1f;

Thus we get bit 8-12 of MSR_PLATFORM_INFO, however according to the SDM
(35.5), the ratio bits are bit 8-15.

Ignoring the upper bits can result in an incorrect tsc ratio, which causes the
TSC calibration and the Local APIC timer frequency to be incorrect.

Fix this problem by masking 0xff instead.

[ tglx: Massaged changelog ]

Fixes: 7da7c1561366 "x86, tsc: Add static (MSR) TSC calibration on Intel Atom SoCs"
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: stable@vger.kernel.org
Cc: Bin Gao <bin.gao@intel.com>
Cc: Len Brown <lenb@kernel.org>
Link: http://lkml.kernel.org/r/1462505619-5516-1-git-send-email-yu.c.chen@intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
8 years agoMerge branch 'akpm' (patches from Andrew)
Linus Torvalds [Fri, 6 May 2016 03:48:35 +0000 (20:48 -0700)]
Merge branch 'akpm' (patches from Andrew)

Merge fixes from Andrew Morton:
 "14 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  byteswap: try to avoid __builtin_constant_p gcc bug
  lib/stackdepot: avoid to return 0 handle
  mm: fix kcompactd hang during memory offlining
  modpost: fix module autoloading for OF devices with generic compatible property
  proc: prevent accessing /proc/<PID>/environ until it's ready
  mm/zswap: provide unique zpool name
  mm: thp: kvm: fix memory corruption in KVM with THP enabled
  MAINTAINERS: fix Rajendra Nayak's address
  mm, cma: prevent nr_isolated_* counters from going negative
  mm: update min_free_kbytes from khugepaged after core initialization
  huge pagecache: mmap_sem is unlocked when truncation splits pmd
  rapidio/mport_cdev: fix uapi type definitions
  mm: memcontrol: let v2 cgroups follow changes in system swappiness
  mm: thp: correct split_huge_pages file permission

8 years agomailmap: add John Paul Adrian Glaubitz
Linus Torvalds [Fri, 6 May 2016 03:07:14 +0000 (20:07 -0700)]
mailmap: add John Paul Adrian Glaubitz

Apparently patchwork ended up truncating the full name.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoMerge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdim...
Linus Torvalds [Fri, 6 May 2016 01:10:01 +0000 (18:10 -0700)]
Merge branch 'libnvdimm-fixes' of git://git./linux/kernel/git/nvdimm/nvdimm

Pull libnvdimm fixes from Dan Williams:

 - a fix for the persistent memory 'struct page' driver.  The
   implementation overlooked the fact that pages are allocated in 2MB
   units leading to -ENOMEM when establishing some configurations.

   It's tagged for -stable as the problem was introduced with the
   initial implementation in 4.5.

 - The new "error status translation" routine, introduced with the 4.6
   updates to the nfit driver, missed a necessary path in
   acpi_nfit_ctl().

   The end result is that we are falsely assuming commands complete
   successfully when the embedded status says otherwise.

* 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  nfit: fix translation of command status results
  libnvdimm, pfn: fix memmap reservation sizing

8 years agobyteswap: try to avoid __builtin_constant_p gcc bug
Arnd Bergmann [Thu, 5 May 2016 23:22:39 +0000 (16:22 -0700)]
byteswap: try to avoid __builtin_constant_p gcc bug

This is another attempt to avoid a regression in wwn_to_u64() after that
started using get_unaligned_be64(), which in turn ran into a bug on
gcc-4.9 through 6.1.

The regression got introduced due to the combination of two separate
workarounds (commits e3bde9568d99: "include/linux/unaligned: force
inlining of byteswap operations" and ef3fb2422ffe: "scsi: fc: use
get/put_unaligned64 for wwn access") that each try to sidestep distinct
problems with gcc behavior (code growth and increased stack usage).

Unfortunately after both have been applied, a more serious gcc bug has
been uncovered, leading to incorrect object code that discards part of a
function and causes undefined behavior.

As part of this problem is how __builtin_constant_p gets evaluated on an
argument passed by reference into an inline function, this avoids the
use of __builtin_constant_p() for all architectures that set
CONFIG_ARCH_USE_BUILTIN_BSWAP.  Most architectures do not set
ARCH_SUPPORTS_OPTIMIZED_INLINING, which means they probably do not
suffer from the problem in the qla2xxx driver, but they might still run
into it elsewhere.

Both of the original workarounds were only merged in the 4.6 kernel, and
the bug that is fixed by this patch should only appear if both are
there, so we probably don't need to backport the fix.  On the other
hand, it works by simplifying the code path and should not have any
negative effects.

[arnd@arndb.de: fix older gcc warnings]
  (http://lkml.kernel.org/r/12243652.bxSxEgjgfk@wuerfel)
Link: https://lkml.org/lkml/headers/2016/4/12/1103
Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66122
Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70232
Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70646
Fixes: e3bde9568d99 ("include/linux/unaligned: force inlining of byteswap operations")
Fixes: ef3fb2422ffe ("scsi: fc: use get/put_unaligned64 for wwn access")
Link: http://lkml.kernel.org/r/1780465.XdtPJpi8Tt@wuerfel
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Josh Poimboeuf <jpoimboe@redhat.com>
Tested-by: Josh Poimboeuf <jpoimboe@redhat.com> # on gcc-5.3
Tested-by: Quinn Tran <quinn.tran@qlogic.com>
Cc: Martin Jambor <mjambor@suse.cz>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: James Bottomley <James.Bottomley@hansenpartnership.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Thomas Graf <tgraf@suug.ch>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Himanshu Madhani <himanshu.madhani@qlogic.com>
Cc: Jan Hubicka <hubicka@ucw.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agolib/stackdepot: avoid to return 0 handle
Joonsoo Kim [Thu, 5 May 2016 23:22:35 +0000 (16:22 -0700)]
lib/stackdepot: avoid to return 0 handle

Recently, we allow to save the stacktrace whose hashed value is 0.  It
causes the problem that stackdepot could return 0 even if in success.
User of stackdepot cannot distinguish whether it is success or not so we
need to solve this problem.  In this patch, 1 bit are added to handle
and make valid handle none 0 by setting this bit.  After that, valid
handle will not be 0 and 0 handle will represent failure correctly.

Fixes: 33334e25769c ("lib/stackdepot.c: allow the stack trace hash to be zero")
Link: http://lkml.kernel.org/r/1462252403-1106-1-git-send-email-iamjoonsoo.kim@lge.com
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agomm: fix kcompactd hang during memory offlining
Vlastimil Babka [Thu, 5 May 2016 23:22:32 +0000 (16:22 -0700)]
mm: fix kcompactd hang during memory offlining

Assume memory47 is the last online block left in node1.  This will hang:

  # echo offline > /sys/devices/system/node/node1/memory47/state

After a couple of minutes, the following pops up in dmesg:

  INFO: task bash:957 blocked for more than 120 seconds.
         Not tainted 4.6.0-rc6+ #6
  "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  bash            D ffff8800b7adbaf8     0   957    951 0x00000000
  Call Trace:
    schedule+0x35/0x80
    schedule_timeout+0x1ac/0x270
    wait_for_completion+0xe1/0x120
    kthread_stop+0x4f/0x110
    kcompactd_stop+0x26/0x40
    __offline_pages.constprop.28+0x7e6/0x840
    offline_pages+0x11/0x20
    memory_block_action+0x73/0x1d0
    memory_subsys_offline+0x47/0x60
    device_offline+0x86/0xb0
    store_mem_state+0xda/0xf0
    dev_attr_store+0x18/0x30
    sysfs_kf_write+0x37/0x40
    kernfs_fop_write+0x11d/0x170
    __vfs_write+0x37/0x120
    vfs_write+0xa9/0x1a0
    SyS_write+0x55/0xc0
    entry_SYSCALL_64_fastpath+0x1a/0xa4

kcompactd is waiting for kcompactd_max_order > 0 when it's woken up to
actually exit.  Check kthread_should_stop() to break out of the wait.

Fixes: 698b1b306 ("mm, compaction: introduce kcompactd").
Reported-by: Reza Arbab <arbab@linux.vnet.ibm.com>
Tested-by: Reza Arbab <arbab@linux.vnet.ibm.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: David Rientjes <rientjes@google.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agomodpost: fix module autoloading for OF devices with generic compatible property
Philipp Zabel [Thu, 5 May 2016 23:22:29 +0000 (16:22 -0700)]
modpost: fix module autoloading for OF devices with generic compatible property

Since the wildcard at the end of OF module aliases is gone, autoloading
of modules that don't match a device's last (most generic) compatible
value fails.

For example the CODA960 VPU on i.MX6Q has the SoC specific compatible
"fsl,imx6q-vpu" and the generic compatible "cnm,coda960".  Since the
driver currently only works with knowledge about the SoC specific
integration, it doesn't list "cnm,cod960" in the module device table.

This results in the device compatible
"of:NvpuT<NULL>Cfsl,imx6q-vpuCcnm,coda960" not matching the module alias
"of:N*T*Cfsl,imx6q-vpu" anymore, whereas before commit 2f632369ab79
("modpost: don't add a trailing wildcard for OF module aliases") it
matched the module alias "of:N*T*Cfsl,imx6q-vpu*".

This patch adds two module aliases for each compatible, one without the
wildcard and one with "C*" appended.

  $ modinfo coda | grep imx6q
  alias:          of:N*T*Cfsl,imx6q-vpuC*
  alias:          of:N*T*Cfsl,imx6q-vpu

Fixes: 2f632369ab79 ("modpost: don't add a trailing wildcard for OF module aliases")
Link: http://lkml.kernel.org/r/1462203339-15340-1-git-send-email-p.zabel@pengutronix.de
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Cc: Javier Martinez Canillas <javier@osg.samsung.com>
Cc: Brian Norris <computersforpeace@gmail.com>
Cc: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: <stable@vger.kernel.org> [4.5+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoproc: prevent accessing /proc/<PID>/environ until it's ready
Mathias Krause [Thu, 5 May 2016 23:22:26 +0000 (16:22 -0700)]
proc: prevent accessing /proc/<PID>/environ until it's ready

If /proc/<PID>/environ gets read before the envp[] array is fully set up
in create_{aout,elf,elf_fdpic,flat}_tables(), we might end up trying to
read more bytes than are actually written, as env_start will already be
set but env_end will still be zero, making the range calculation
underflow, allowing to read beyond the end of what has been written.

Fix this as it is done for /proc/<PID>/cmdline by testing env_end for
zero.  It is, apparently, intentionally set last in create_*_tables().

This bug was found by the PaX size_overflow plugin that detected the
arithmetic underflow of 'this_len = env_end - (env_start + src)' when
env_end is still zero.

The expected consequence is that userland trying to access
/proc/<PID>/environ of a not yet fully set up process may get
inconsistent data as we're in the middle of copying in the environment
variables.

Fixes: https://forums.grsecurity.net/viewtopic.php?f=3&t=4363
Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=116461
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Cc: Emese Revfy <re.emese@gmail.com>
Cc: Pax Team <pageexec@freemail.hu>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Mateusz Guzik <mguzik@redhat.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Jarod Wilson <jarod@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agomm/zswap: provide unique zpool name
Dan Streetman [Thu, 5 May 2016 23:22:23 +0000 (16:22 -0700)]
mm/zswap: provide unique zpool name

Instead of using "zswap" as the name for all zpools created, add an
atomic counter and use "zswap%x" with the counter number for each zpool
created, to provide a unique name for each new zpool.

As zsmalloc, one of the zpool implementations, requires/expects a unique
name for each pool created, zswap should provide a unique name.  The
zsmalloc pool creation does not fail if a new pool with a conflicting
name is created, unless CONFIG_ZSMALLOC_STAT is enabled; in that case,
zsmalloc pool creation fails with -ENOMEM.  Then zswap will be unable to
change its compressor parameter if its zpool is zsmalloc; it also will
be unable to change its zpool parameter back to zsmalloc, if it has any
existing old zpool using zsmalloc with page(s) in it.  Attempts to
change the parameters will result in failure to create the zpool.  This
changes zswap to provide a unique name for each zpool creation.

Fixes: f1c54846ee45 ("zswap: dynamic pool creation")
Signed-off-by: Dan Streetman <ddstreet@ieee.org>
Reported-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Dan Streetman <dan.streetman@canonical.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agomm: thp: kvm: fix memory corruption in KVM with THP enabled
Andrea Arcangeli [Thu, 5 May 2016 23:22:20 +0000 (16:22 -0700)]
mm: thp: kvm: fix memory corruption in KVM with THP enabled

After the THP refcounting change, obtaining a compound pages from
get_user_pages() no longer allows us to assume the entire compound page
is immediately mappable from a secondary MMU.

A secondary MMU doesn't want to call get_user_pages() more than once for
each compound page, in order to know if it can map the whole compound
page.  So a secondary MMU needs to know from a single get_user_pages()
invocation when it can map immediately the entire compound page to avoid
a flood of unnecessary secondary MMU faults and spurious
atomic_inc()/atomic_dec() (pages don't have to be pinned by MMU notifier
users).

Ideally instead of the page->_mapcount < 1 check, get_user_pages()
should return the granularity of the "page" mapping in the "mm" passed
to get_user_pages().  However it's non trivial change to pass the "pmd"
status belonging to the "mm" walked by get_user_pages up the stack (up
to the caller of get_user_pages).  So the fix just checks if there is
not a single pte mapping on the page returned by get_user_pages, and in
turn if the caller can assume that the whole compound page is mapped in
the current "mm" (in a pmd_trans_huge()).  In such case the entire
compound page is safe to map into the secondary MMU without additional
get_user_pages() calls on the surrounding tail/head pages.  In addition
of being faster, not having to run other get_user_pages() calls also
reduces the memory footprint of the secondary MMU fault in case the pmd
split happened as result of memory pressure.

Without this fix after a MADV_DONTNEED (like invoked by QEMU during
postcopy live migration or balloning) or after generic swapping (with a
failure in split_huge_page() that would only result in pmd splitting and
not a physical page split), KVM would map the whole compound page into
the shadow pagetables, despite regular faults or userfaults (like
UFFDIO_COPY) may map regular pages into the primary MMU as result of the
pte faults, leading to the guest mode and userland mode going out of
sync and not working on the same memory at all times.

Any other secondary MMU notifier manager (KVM is just one of the many
MMU notifier users) will need the same information if it doesn't want to
run a flood of get_user_pages_fast and it can support multiple
granularity in the secondary MMU mappings, so I think it is justified to
be exposed not just to KVM.

The other option would be to move transparent_hugepage_adjust to
mm/huge_memory.c but that currently has all kind of KVM data structures
in it, so it's definitely not a cut-and-paste work, so I couldn't do a
fix as cleaner as this one for 4.6.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>
Cc: "Li, Liang Z" <liang.z.li@intel.com>
Cc: Amit Shah <amit.shah@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoMAINTAINERS: fix Rajendra Nayak's address
Eric Engestrom [Thu, 5 May 2016 23:22:17 +0000 (16:22 -0700)]
MAINTAINERS: fix Rajendra Nayak's address

Signed-off-by: Eric Engestrom <eric.engestrom@imgtec.com>
Cc: Rajendra Nayak <rnayak@codeaurora.org>
Cc: Afzal Mohammed <afzal.mohd.ma@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agomm, cma: prevent nr_isolated_* counters from going negative
Hugh Dickins [Thu, 5 May 2016 23:22:15 +0000 (16:22 -0700)]
mm, cma: prevent nr_isolated_* counters from going negative

/proc/sys/vm/stat_refresh warns nr_isolated_anon and nr_isolated_file go
increasingly negative under compaction: which would add delay when
should be none, or no delay when should delay.  The bug in compaction
was due to a recent mmotm patch, but much older instance of the bug was
also noticed in isolate_migratepages_range() which is used for CMA and
gigantic hugepage allocations.

The bug is caused by putback_movable_pages() in an error path
decrementing the isolated counters without them being previously
incremented by acct_isolated().  Fix isolate_migratepages_range() by
removing the error-path putback, thus reaching acct_isolated() with
migratepages still isolated, and leaving putback to caller like most
other places do.

Fixes: edc2ca612496 ("mm, compaction: move pageblock checks up from isolate_migratepages_range()")
[vbabka@suse.cz: expanded the changelog]
Signed-off-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agomm: update min_free_kbytes from khugepaged after core initialization
Jason Baron [Thu, 5 May 2016 23:22:12 +0000 (16:22 -0700)]
mm: update min_free_kbytes from khugepaged after core initialization

Khugepaged attempts to raise min_free_kbytes if its set too low.
However, on boot khugepaged sets min_free_kbytes first from
subsys_initcall(), and then the mm 'core' over-rides min_free_kbytes
after from init_per_zone_wmark_min(), via a module_init() call.

Khugepaged used to use a late_initcall() to set min_free_kbytes (such
that it occurred after the core initialization), however this was
removed when the initialization of min_free_kbytes was integrated into
the starting of the khugepaged thread.

The fix here is simply to invoke the core initialization using a
core_initcall() instead of module_init(), such that the previous
initialization ordering is restored.  I didn't restore the
late_initcall() since start_stop_khugepaged() already sets
min_free_kbytes via set_recommended_min_free_kbytes().

This was noticed when we had a number of page allocation failures when
moving a workload to a kernel with this new initialization ordering.  On
an 8GB system this restores min_free_kbytes back to 67584 from 11365
when CONFIG_TRANSPARENT_HUGEPAGE=y is set and either
CONFIG_TRANSPARENT_HUGEPAGE_ALWAYS=y or
CONFIG_TRANSPARENT_HUGEPAGE_MADVISE=y.

Fixes: 79553da293d3 ("thp: cleanup khugepaged startup")
Signed-off-by: Jason Baron <jbaron@akamai.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agohuge pagecache: mmap_sem is unlocked when truncation splits pmd
Hugh Dickins [Thu, 5 May 2016 23:22:09 +0000 (16:22 -0700)]
huge pagecache: mmap_sem is unlocked when truncation splits pmd

zap_pmd_range()'s CONFIG_DEBUG_VM !rwsem_is_locked(&mmap_sem) BUG() will
be invalid with huge pagecache, in whatever way it is implemented:
truncation of a hugely-mapped file to an unhugely-aligned size would
easily hit it.

(Although anon THP could in principle apply khugepaged to private file
mappings, which are not excluded by the MADV_HUGEPAGE restrictions, in
practice there's a vm_ops check which excludes them, so it never hits
this BUG() - there's no interface to "truncate" an anonymous mapping.)

We could complicate the test, to check i_mmap_rwsem also when there's a
vm_file; but my inclination was to make zap_pmd_range() more readable by
simply deleting this check.  A search has shown no report of the issue
in the years since commit e0897d75f0b2 ("mm, thp: print useful
information when mmap_sem is unlocked in zap_pmd_range") expanded it
from VM_BUG_ON() - though I cannot point to what commit I would say then
fixed the issue.

But there are a couple of other patches now floating around, neither yet
in the tree: let's agree to retain the check as a VM_BUG_ON_VMA(), as
Matthew Wilcox has done; but subject to a vma_is_anonymous() check, as
Kirill Shutemov has done.  And let's get this in, without waiting for
any particular huge pagecache implementation to reach the tree.

Matthew said "We can reproduce this BUG() in the current Linus tree with
DAX PMDs".

Signed-off-by: Hugh Dickins <hughd@google.com>
Tested-by: Matthew Wilcox <willy@linux.intel.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Andres Lagar-Cavilla <andreslc@google.com>
Cc: Yang Shi <yang.shi@linaro.org>
Cc: Ning Qu <quning@gmail.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Andres Lagar-Cavilla <andreslc@google.com>
Cc: Konstantin Khlebnikov <koct9i@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agorapidio/mport_cdev: fix uapi type definitions
Alexandre Bounine [Thu, 5 May 2016 23:22:06 +0000 (16:22 -0700)]
rapidio/mport_cdev: fix uapi type definitions

Fix problems in uapi definitions reported by Gabriel Laskar: (see
https://lkml.org/lkml/2016/4/5/205 for details)

 - move public header file rio_mport_cdev.h to include/uapi/linux directory
 - change types in data structures passed as IOCTL parameters
 - improve parameter checking in some IOCTL service routines

Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Reported-by: Gabriel Laskar <gabriel@lse.epita.fr>
Tested-by: Barry Wood <barry.wood@idt.com>
Cc: Gabriel Laskar <gabriel@lse.epita.fr>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Aurelien Jacquiot <a-jacquiot@ti.com>
Cc: Andre van Herk <andre.van.herk@prodrive-technologies.com>
Cc: Barry Wood <barry.wood@idt.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agomm: memcontrol: let v2 cgroups follow changes in system swappiness
Johannes Weiner [Thu, 5 May 2016 23:22:03 +0000 (16:22 -0700)]
mm: memcontrol: let v2 cgroups follow changes in system swappiness

Cgroup2 currently doesn't have a per-cgroup swappiness setting.  We
might want to add one later - that's a different discussion - but until
we do, the cgroups should always follow the system setting.  Otherwise
it will be unchangeably set to whatever the ancestor inherited from the
system setting at the time of cgroup creation.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Vladimir Davydov <vdavydov@virtuozzo.com>
Cc: <stable@vger.kernel.org> [4.5]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agomm: thp: correct split_huge_pages file permission
Yang Shi [Thu, 5 May 2016 23:22:00 +0000 (16:22 -0700)]
mm: thp: correct split_huge_pages file permission

split_huge_pages doesn't support get method at all, so the read
permission sounds confusing, change the permission to write only.

And, add "\n" to the output of set method to make it more readable.

Signed-off-by: Yang Shi <yang.shi@linaro.org>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoMerge back new ACPICA material for v4.7.
Rafael J. Wysocki [Thu, 5 May 2016 23:41:06 +0000 (01:41 +0200)]
Merge back new ACPICA material for v4.7.

8 years agoMerge tag 'asm-generic-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd...
Linus Torvalds [Thu, 5 May 2016 22:40:38 +0000 (15:40 -0700)]
Merge tag 'asm-generic-4.6' of git://git./linux/kernel/git/arnd/asm-generic

Pull asm-generic syscall fix from Arnd Bergmann:
 "My last pull request for asm-generic had just one patch that added two
  new system calls to asm/unistd.h, but unfortunately it turned out to
  be wrong, pointing arch/tile compat mode at the native handlers rather
  than the compat ones.

  This was spotted by Yury Norov, who is working on ILP32 mode for
  arch/arm64, which would have the same problem when merged.  This fixes
  the table to use the correct compat syscalls, like the other 64-bit
  architectures do.

  I'll try to find the time to come up with a solution that prevents
  this problem from happening again, by allowing all future system calls
  to just get added in a single file for use by all architectures"

* tag 'asm-generic-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
  asm-generic: use compat version for preadv2 and pwritev2

8 years agoMerge tag 'iio-fixes-for-4.6d' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23...
Greg Kroah-Hartman [Thu, 5 May 2016 22:38:07 +0000 (15:38 -0700)]
Merge tag 'iio-fixes-for-4.6d' of git://git./linux/kernel/git/jic23/iio into staging-linus

Jonathan writes:

Fourth set of IIO fixes for the 4.6 cycle.

This last minute set is concerned with a regression in the mpu6050 driver.
The regression causes a null pointer dereference on any ACPI device
that has one of these present such as the ASUS T100TA Baytrail/T.

The issue was known but thought (i.e. missunderstood by me)
to only be a possible with no reports, so was routed via the normal merge
window.  Turns out this was wrong (thanks to Alan for reporting the crash).

The pull is just for the null dereference fix and a followup fix
that also stops the reported name of the device being NULL.

* mpu6050
  - Fix a 'possible' NULL dereference introduced as part of splitting the
  driver to allow both i2c and spi to be supported.  The issue affects ACPI
  systems with this device.
  - Fix a follow up issue where the name and chip id both get set to null if
  the device driver instance is instantiated from ACPI tables.

8 years agoMerge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm...
Linus Torvalds [Thu, 5 May 2016 22:31:35 +0000 (15:31 -0700)]
Merge tag 'fixes-for-linus' of git://git./linux/kernel/git/arm/arm-soc

Pull ARM SoC fixes from Arnd Bergmann:
 "Here are a couple last-minute fixes for ARM SoCs.  Most of them are
  for the OMAP platforms, the rest are all for different platforms.

  OMAP:
     All dts fixes, mostly affecting voltages and pinctrl for various
     device drivers:

      - Regulator minimum voltage fixes for omap5
      - ISP syscon register offset fix for omap3
      - Fix regulator initial modes for n900
      - Fix omap5 pinctrl wkup instance size

  Allwinner:
     Remove incorrect constraints from a dcdc1 regulator

  Alltera SoCFPGA:
     Fix compilation in thumb2 mode

  Samsung exynos:
     Fix a potential oops in the pm-domain error handling

  Davinci:
     Avoid a link error if NVMEM is disabled

  Renesas:
     Do not mark an external uart clock as disabled, to allow probing
     the uarts"

* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  ARM: davinci: only use NVMEM when available
  ARM: SoCFPGA: Fix secondary CPU startup in thumb2 kernel
  ARM: dts: omap5: fix range of permitted wakeup pinmux registers
  ARM: dts: omap3-n900: Specify peripherals LDO regulators initial mode
  ARM: dts: omap3: Fix ISP syscon register offset
  ARM: dts: omap5-cm-t54: fix ldo1_reg and ldo4_reg ranges
  ARM: dts: omap5-board-common: fix ldo1_reg and ldo4_reg ranges
  arm64: dts: r8a7795: Don't disable referenced optional scif clock
  ARM: EXYNOS: Properly skip unitialized parent clock in power domain on
  ARM: dts: sun8i-q8-common: Do not set constraints on dc1sw regulator

8 years agomaintainers: update rmk's email address(es)
Russell King [Thu, 5 May 2016 16:12:54 +0000 (17:12 +0100)]
maintainers: update rmk's email address(es)

Update my email and web addresses in the kernel maintainers file.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agowriteback: Fix performance regression in wb_over_bg_thresh()
Howard Cochran [Thu, 10 Mar 2016 06:12:39 +0000 (01:12 -0500)]
writeback: Fix performance regression in wb_over_bg_thresh()

Commit 947e9762a8dd ("writeback: update wb_over_bg_thresh() to use
wb_domain aware operations") unintentionally changed this function's
meaning from "are there more dirty pages than the background writeback
threshold" to "are there more dirty pages than the writeback threshold".
The background writeback threshold is typically half of the writeback
threshold, so this had the effect of raising the number of dirty pages
required to cause a writeback worker to perform background writeout.

This can cause a very severe performance regression when a BDI uses
BDI_CAP_STRICTLIMIT because balance_dirty_pages() and the writeback worker
can now disagree on whether writeback should be initiated.

For example, in a system having 1GB of RAM, a single spinning disk, and a
"pass-through" FUSE filesystem mounted over the disk, application code
mmapped a 128MB file on the disk and was randomly dirtying pages in that
mapping.

Because FUSE uses strictlimit and has a default max_ratio of only 1%, in
balance_dirty_pages, thresh is ~200, bg_thresh is ~100, and the
dirty_freerun_ceiling is the average of those, ~150. So, it pauses the
dirtying processes when we have 151 dirty pages and wakes up a background
writeback worker. But the worker tests the wrong threshold (200 instead of
100), so it does not initiate writeback and just returns.

Thus, balance_dirty_pages keeps looping, sleeping and then waking up the
worker who will do nothing. It remains stuck in this state until the few
dirty pages that we have finally expire and we write them back for that
reason. Then the whole process repeats, resulting in near-zero throughput
through the FUSE BDI.

The fix is to call the parameterized variant of wb_calc_thresh, so that the
worker will do writeback if the bg_thresh is exceeded which was the
behavior before the referenced commit.

Fixes: 947e9762a8dd ("writeback: update wb_over_bg_thresh() to use wb_domain aware operations")
Signed-off-by: Howard Cochran <hcochran@kernelspring.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Cc: <stable@vger.kernel.org> # v4.2+
Tested-by Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
8 years agoARM: 8573/1: domain: move {set,get}_domain under config guard
Vladimir Murzin [Wed, 4 May 2016 09:39:02 +0000 (10:39 +0100)]
ARM: 8573/1: domain: move {set,get}_domain under config guard

Recursive undefined instrcution falut is seen with R-class taking an
exception. The reson for that is __show_regs() tries to get domain
information, but domains is not available on !MMU cores, like R/M
class.

Fix it by puting {set,get}_domain functions under CONFIG_CPU_CP15_MMU
guard and providing stubs for the case where domains is not supported.

Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
8 years agoARM: 8572/1: nommu: change memory reserve for the vectors
Jean-Philippe Brucker [Wed, 4 May 2016 09:38:12 +0000 (10:38 +0100)]
ARM: 8572/1: nommu: change memory reserve for the vectors

Commit 19accfd3 (ARM: move vector stubs) moved the vector stubs in an
additional page above the base vector one. This change wasn't taken into
account by the nommu memreserve.
This patch ensures that the kernel won't overwrite any vector stub on
nommu.

[changed the MPU side too]

Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>
Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
8 years agoARM: 8571/1: nommu: fix PMSAv7 setup
Jean-Philippe Brucker [Wed, 4 May 2016 09:37:22 +0000 (10:37 +0100)]
ARM: 8571/1: nommu: fix PMSAv7 setup

Commit 1c2f87c (ARM: 8025/1: Get rid of meminfo) broke the support for
MPU on ARMv7-R. This patch adapts the code inside CONFIG_ARM_MPU to use
memblocks appropriately.

MPU initialisation only uses the first memory region, and removes all
subsequent ones. Because looping over all regions that need removal is
inefficient, and memblock_remove already handles memory ranges, we can
flatten the 'for_each_memblock' part.

Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>
Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
8 years agoIB/iser: Fix max_sectors calculation
Christoph Hellwig [Mon, 18 Apr 2016 21:06:28 +0000 (17:06 -0400)]
IB/iser: Fix max_sectors calculation

iSER currently has a couple places that set max_sectors in either the host
template or SCSI host, and all of them get it wrong.

This patch instead uses a single assignment that (hopefully) gets it right:
the max_sectors value must be derived from the number of segments in the
FR or FMR structure, but actually be one lower than the page size multiplied
by the number of sectors, as it has to handle the case of non-aligned I/O.

Without this I get trivial to reproduce hangs when running xfstests
(on XFS) over iSER to Linux targets.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Acked-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Doug Ledford <dledford@redhat.com>
8 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm...
Linus Torvalds [Thu, 5 May 2016 15:41:57 +0000 (08:41 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/ebiederm/user-namespace

Pull userns fix from Eric Biederman:
 "This contains just a single fix for a nasty oops"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
  propogate_mnt: Handle the first propogated copy being a slave

8 years agoMerge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
Linus Torvalds [Thu, 5 May 2016 15:26:54 +0000 (08:26 -0700)]
Merge tag 'for_linus' of git://git./linux/kernel/git/mst/vhost

Pull virtio/qemu fixes from Michael Tsirkin:
 "A couple of fixes for virtio and for the new QEMU fw cfg driver"

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  virtio: Silence uninitialized variable warning
  firmware: qemu_fw_cfg.c: potential unintialized variable

8 years agopropogate_mnt: Handle the first propogated copy being a slave
Eric W. Biederman [Thu, 5 May 2016 14:29:29 +0000 (09:29 -0500)]
propogate_mnt: Handle the first propogated copy being a slave

When the first propgated copy was a slave the following oops would result:
> BUG: unable to handle kernel NULL pointer dereference at 0000000000000010
> IP: [<ffffffff811fba4e>] propagate_one+0xbe/0x1c0
> PGD bacd4067 PUD bac66067 PMD 0
> Oops: 0000 [#1] SMP
> Modules linked in:
> CPU: 1 PID: 824 Comm: mount Not tainted 4.6.0-rc5userns+ #1523
> Hardware name: Bochs Bochs, BIOS Bochs 01/01/2007
> task: ffff8800bb0a8000 ti: ffff8800bac3c000 task.ti: ffff8800bac3c000
> RIP: 0010:[<ffffffff811fba4e>]  [<ffffffff811fba4e>] propagate_one+0xbe/0x1c0
> RSP: 0018:ffff8800bac3fd38  EFLAGS: 00010283
> RAX: 0000000000000000 RBX: ffff8800bb77ec00 RCX: 0000000000000010
> RDX: 0000000000000000 RSI: ffff8800bb58c000 RDI: ffff8800bb58c480
> RBP: ffff8800bac3fd48 R08: 0000000000000001 R09: 0000000000000000
> R10: 0000000000001ca1 R11: 0000000000001c9d R12: 0000000000000000
> R13: ffff8800ba713800 R14: ffff8800bac3fda0 R15: ffff8800bb77ec00
> FS:  00007f3c0cd9b7e0(0000) GS:ffff8800bfb00000(0000) knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 0000000000000010 CR3: 00000000bb79d000 CR4: 00000000000006e0
> Stack:
>  ffff8800bb77ec00 0000000000000000 ffff8800bac3fd88 ffffffff811fbf85
>  ffff8800bac3fd98 ffff8800bb77f080 ffff8800ba713800 ffff8800bb262b40
>  0000000000000000 0000000000000000 ffff8800bac3fdd8 ffffffff811f1da0
> Call Trace:
>  [<ffffffff811fbf85>] propagate_mnt+0x105/0x140
>  [<ffffffff811f1da0>] attach_recursive_mnt+0x120/0x1e0
>  [<ffffffff811f1ec3>] graft_tree+0x63/0x70
>  [<ffffffff811f1f6b>] do_add_mount+0x9b/0x100
>  [<ffffffff811f2c1a>] do_mount+0x2aa/0xdf0
>  [<ffffffff8117efbe>] ? strndup_user+0x4e/0x70
>  [<ffffffff811f3a45>] SyS_mount+0x75/0xc0
>  [<ffffffff8100242b>] do_syscall_64+0x4b/0xa0
>  [<ffffffff81988f3c>] entry_SYSCALL64_slow_path+0x25/0x25
> Code: 00 00 75 ec 48 89 0d 02 22 22 01 8b 89 10 01 00 00 48 89 05 fd 21 22 01 39 8e 10 01 00 00 0f 84 e0 00 00 00 48 8b 80 d8 00 00 00 <48> 8b 50 10 48 89 05 df 21 22 01 48 89 15 d0 21 22 01 8b 53 30
> RIP  [<ffffffff811fba4e>] propagate_one+0xbe/0x1c0
>  RSP <ffff8800bac3fd38>
> CR2: 0000000000000010
> ---[ end trace 2725ecd95164f217 ]---

This oops happens with the namespace_sem held and can be triggered by
non-root users.  An all around not pleasant experience.

To avoid this scenario when finding the appropriate source mount to
copy stop the walk up the mnt_master chain when the first source mount
is encountered.

Further rewrite the walk up the last_source mnt_master chain so that
it is clear what is going on.

The reason why the first source mount is special is that it it's
mnt_parent is not a mount in the dest_mnt propagation tree, and as
such termination conditions based up on the dest_mnt mount propgation
tree do not make sense.

To avoid other kinds of confusion last_dest is not changed when
computing last_source.  last_dest is only used once in propagate_one
and that is above the point of the code being modified, so changing
the global variable is meaningless and confusing.

Cc: stable@vger.kernel.org
fixes: f2ebb3a921c1ca1e2ddd9242e95a1989a50c4c68 ("smarter propagate_mnt()")
Reported-by: Tycho Andersen <tycho.andersen@canonical.com>
Reviewed-by: Seth Forshee <seth.forshee@canonical.com>
Tested-by: Seth Forshee <seth.forshee@canonical.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
8 years agox86/sysfb_efi: Fix valid BAR address range check
Wang YanQing [Thu, 5 May 2016 13:14:21 +0000 (14:14 +0100)]
x86/sysfb_efi: Fix valid BAR address range check

The code for checking whether a BAR address range is valid will break
out of the loop when a start address of 0x0 is encountered.

This behaviour is wrong since by breaking out of the loop we may miss
the BAR that describes the EFI frame buffer in a later iteration.

Because of this bug I can't use video=efifb: boot parameter to get
efifb on my new ThinkPad E550 for my old linux system hard disk with
3.10 kernel. In 3.10, efifb is the only choice due to DRM/I915 not
supporting the GPU.

This patch also add a trivial optimization to break out after we find
the frame buffer address range without testing later BARs.

Signed-off-by: Wang YanQing <udknight@gmail.com>
[ Rewrote changelog. ]
Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk>
Reviewed-by: Peter Jones <pjones@redhat.com>
Cc: <stable@vger.kernel.org>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: David Herrmann <dh.herrmann@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: linux-efi@vger.kernel.org
Link: http://lkml.kernel.org/r/1462454061-21561-2-git-send-email-matt@codeblueprint.co.uk
Signed-off-by: Ingo Molnar <mingo@kernel.org>
8 years agoACPICA: Update version to 20160422
Bob Moore [Thu, 5 May 2016 05:00:42 +0000 (13:00 +0800)]
ACPICA: Update version to 20160422

ACPICA commit a2327ba410e19c2aabaf34b711dbadf7d1dcf346

Version 20160422.

Link: https://github.com/acpica/acpica/commit/a2327ba4
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
8 years agoACPICA: Move all ASCII utilities to a common file
Bob Moore [Thu, 5 May 2016 05:00:36 +0000 (13:00 +0800)]
ACPICA: Move all ASCII utilities to a common file

ACPICA commit ba60e4500053010bf775d58f6f61febbdb94d817

New file is utascii.c

Link: https://github.com/acpica/acpica/commit/ba60e450
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
8 years agoACPICA: ACPI 2.0, Hardware: Add access_width/bit_offset support for acpi_hw_write()
Lv Zheng [Thu, 5 May 2016 05:00:29 +0000 (13:00 +0800)]
ACPICA: ACPI 2.0, Hardware: Add access_width/bit_offset support for acpi_hw_write()

ACPICA commit 48eea5e7993ccb7189bd63cd726e02adafee6057

This patch adds access_width/bit_offset support in acpi_hw_write().
Lv Zheng.

Link: https://github.com/acpica/acpica/commit/48eea5e7
Link: https://bugs.acpica.org/show_bug.cgi?id=1240
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
8 years agoACPICA: ACPI 2.0, Hardware: Add access_width/bit_offset support in acpi_hw_read()
Lv Zheng [Thu, 5 May 2016 04:58:52 +0000 (12:58 +0800)]
ACPICA: ACPI 2.0, Hardware: Add access_width/bit_offset support in acpi_hw_read()

ACPICA commit 96ece052d4d073aae4f935f0ff0746646aea1174
ACPICA commit 3d8583a054e410f2ea4d73b48986facad9cfc0d4

This patch adds access_width/bit_offset support in acpi_hw_read().
This also enables GAS definition where bit_width is not a power of
two. Lv Zheng.

Link: https://github.com/acpica/acpica/commit/96ece052
Link: https://github.com/acpica/acpica/commit/3d8583a0
Link: https://bugs.acpica.org/show_bug.cgi?id=1240
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
8 years agoACPICA: Executer: Introduce a set of macros to handle bit width mask generation
Lv Zheng [Thu, 5 May 2016 04:58:45 +0000 (12:58 +0800)]
ACPICA: Executer: Introduce a set of macros to handle bit width mask generation

ACPICA commit c23034a3a09d5ed79f1827d51f43cfbccf68ab64

A regression was reported to the shift offset >= width of type.
This patch fixes this issue. BZ 1270.

This is a part of the fix because the order of the patches are modified for
Linux upstream, containing the cleanups for the old code. Lv Zheng.

Link: https://github.com/acpica/acpica/commit/c23034a3
Link: https://bugs.acpica.org/show_bug.cgi?id=1270
Reported-by: Sascha Wildner <swildner@gmail.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
8 years agoACPICA: Hardware: Add optimized access bit width support
Lv Zheng [Thu, 5 May 2016 04:58:39 +0000 (12:58 +0800)]
ACPICA: Hardware: Add optimized access bit width support

ACPICA commit c49a751b4dae7baec1790748a2b4b6e8ab599f51

For Access Size = 0, it actually can use user expected access bit width.
This patch implements this.

Besides of the ACPICA upstream commit, this patch also includes a fix fixing
the issue reported by the FreeBSD community.

The old register descriptors are translated in acpi_tb_init_generic_address()
with access_width being filled with 0. This breaks code in
acpi_hw_get_access_bit_width() when the registers are 16-bit IO ports and their
bit_width fields are filled with 16. The rapid fix is meant to make code
written for acpi_hw_get_access_bit_width() regression safer before the issue is
correctly fixed from acpi_tb_init_generic_address(). Reported by
John Baldwin <jhb@freebsd.org>, fixed by Lv Zheng <lv.zheng@intel.com>, tested
by Jung-uk Kim <jkim@freebsd.org>.

Link: https://github.com/acpica/acpica/commit/c49a751b
Reported-by: John Baldwin <jhb@freebsd.org>
Tested-by Jung-uk Kim <jkim@freebsd.org>.
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
8 years agoACPICA: Utilities: Add ACPI_IS_ALIGNED() macro
Lv Zheng [Thu, 5 May 2016 04:58:32 +0000 (12:58 +0800)]
ACPICA: Utilities: Add ACPI_IS_ALIGNED() macro

This patch introduces ACPI_IS_ALIGNED() macro. Lv Zheng.

Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
8 years agoACPICA: Renamed some #defined flag constants for clarity
Bob Moore [Thu, 5 May 2016 04:58:25 +0000 (12:58 +0800)]
ACPICA: Renamed some #defined flag constants for clarity

ACPICA commit 438905b205e64e742f9670a0970419c426264831

Expanded a couple of cryptic names.

Link: https://github.com/acpica/acpica/commit/438905b2
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
8 years agoACPICA: ACPI 6.0, tools/iasl: Add support for new resource descriptors
Bob Moore [Thu, 5 May 2016 04:58:19 +0000 (12:58 +0800)]
ACPICA: ACPI 6.0, tools/iasl: Add support for new resource descriptors

ACPICA commit 5a0555ece4ba9917e5842b21d88469ae06b4e815

Adds full support for:
i2c_serial_bus_v2
spi_serial_bus_v2
uart_serial_bus_v2

Compiler, Disassembler, Resource Manager, acpi_help.

Link: https://github.com/acpica/acpica/commit/5a0555ec
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
8 years agoACPICA: ACPI 6.0: Update _BIX support for new package element
Bob Moore [Thu, 5 May 2016 04:58:12 +0000 (12:58 +0800)]
ACPICA: ACPI 6.0: Update _BIX support for new package element

ACPICA commit 3451e6d49d37919c13ec2c0019a31534b0dfc0c0

One integer was added at the end of the _BIX method, and the
version number was incremented.

Link: https://github.com/acpica/acpica/commit/3451e6d4
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
8 years agoACPICA: ACPI 6.1: Support for new PCCT subtable
Bob Moore [Thu, 5 May 2016 04:58:05 +0000 (12:58 +0800)]
ACPICA: ACPI 6.1: Support for new PCCT subtable

ACPICA commit de3ea7c322b9b6bdb09aa90c2e1d420cd4dce47c

Additional subspace structure was added.

Link: https://github.com/acpica/acpica/commit/de3ea7c3
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
8 years agoACPICA: Refactor evaluate_object to reduce nesting
Bob Moore [Thu, 5 May 2016 04:58:00 +0000 (12:58 +0800)]
ACPICA: Refactor evaluate_object to reduce nesting

ACPICA commit 599e9159f53565e4a3f3e67f6a03f81fcb10a4cf

Original patch from hanjun.guo@linaro.org

ACPICA BZ 1072.

Link: https://github.com/acpica/acpica/commit/599e9159
Link: https://bugs.acpica.org/show_bug.cgi?id=1072
Original-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
8 years agoACPICA: Divergence: remove unwanted spaces for typedef
Lv Zheng [Thu, 5 May 2016 04:57:53 +0000 (12:57 +0800)]
ACPICA: Divergence: remove unwanted spaces for typedef

ACPICA commit b2294cae776f5a66a7697414b21949d307e6856f

This patch removes unwanted spaces for typedef. This solution doesn't cover
function types.

Note that the linuxize result of this commit is very giant and should have
many conflicts against the current Linux upstream. Thus it is required to
modify the linuxize result of this commit and the commits around it
manually in order to have them merged to the Linux upstream. Since this is
very costy, we should do this only once, and if we can't ensure to do this
only once, we need to revert the Linux code to the wrong indentation result
before merging the linuxize result of this commit. Lv Zheng.

Link: https://github.com/acpica/acpica/commit/b2294cae
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
8 years agoARC: support HIGHMEM even without PAE40
Vineet Gupta [Mon, 18 Apr 2016 05:19:56 +0000 (10:49 +0530)]
ARC: support HIGHMEM even without PAE40

Initial HIGHMEM support on ARC was introduced for PAE40 where the low
memory (0x8000_0000 based) and high memory (0x1_0000_0000) were
physically contiguous. So CONFIG_FLATMEM sufficed (despite a peipheral
hole in the middle, which wasted a bit of struct page memory, but things
worked).

However w/o PAE, highmem was not possible and we could only reach
~1.75GB of DDR. Now there is a use case to access ~4GB of DDR w/o PAE40
The idea is to have low memory at canonical 0x8000_0000 and highmem
at 0 so enire 4GB address space is available for physical addressing
This needs additional platform/interconnect mapping to convert
the non contiguous physical addresses into linear bus adresses.

From Linux point of view, non contiguous divide means FLATMEM no
longer works and DISCONTIGMEM is needed to track the pfns in the 2
regions.

This scheme would also work for PAE40, only better in that we don't
waste struct page memory for the peripheral hole.

The DT description will be something like

    memory {
        ...
        reg = <0x80000000 0x200000000   /* 512MB: lowmem */
               0x00000000 0x10000000>;  /* 256MB: highmem */
   }

Signed-off-by: Noam Camus <noamc@ezchip.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
8 years agoARC: Fix PAE40 boot failures due to PTE truncation
Vineet Gupta [Thu, 5 May 2016 09:23:48 +0000 (14:53 +0530)]
ARC: Fix PAE40 boot failures due to PTE truncation

So a benign looking cleanup which macro'ized PAGE_SHIFT shifts turned
out to be bad (since it was done non-sensically across the board).

It caused boot failures with PAE40 as forced cast to (unsigned long)
from newly introduced virt_to_pfn() was causing truncatiion of the
(long long) pte/paddr values.

It is OK to use this in accessors dealing with kernel virtual address,
pointers etc, but not for PTE values themelves.

Fixes: cJ2ff5cf2735c ("ARC: mm: Use virt_to_pfn() for addr >> PAGE_SHIFT pattern)
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
8 years agoARC: Add missing io barriers to io{read,write}{16,32}be()
Vineet Gupta [Thu, 5 May 2016 08:02:34 +0000 (13:32 +0530)]
ARC: Add missing io barriers to io{read,write}{16,32}be()

While reviewing a different change to asm-generic/io.h Arnd spotted that
ARC ioread32 and ioread32be both of which come from asm-generic versions
are not symmetrical in terms of calling the io barriers.

generic ioread32   -> ARC readl()                  [ has barriers]
generic ioread32be -> __be32_to_cpu(__raw_readl()) [ lacks barriers]

While generic ioread32be is being remediated to call readl(), that involves
a swab32(), causing double swaps on ioread32be() on Big Endian systems.

So provide our versions of big endian IO accessors to ensure io barrier
calls while also keeping them optimal

Suggested-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Cc: stable@vger.kernel.org [4.2+]
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
8 years ago[media] media-device: fix builds when USB or PCI is compiled as module
Mauro Carvalho Chehab [Thu, 5 May 2016 11:01:34 +0000 (08:01 -0300)]
[media] media-device: fix builds when USB or PCI is compiled as module

Just checking ifdef CONFIG_USB is not enough, if the USB is compiled
as module. The same applies to PCI.

Tested with the following .config alternatives:

CONFIG_USB=m
CONFIG_MEDIA_CONTROLLER=y
CONFIG_MEDIA_SUPPORT=m
CONFIG_VIDEO_AU0828=m

CONFIG_USB=m
CONFIG_MEDIA_CONTROLLER=y
CONFIG_MEDIA_SUPPORT=y
CONFIG_VIDEO_AU0828=m

CONFIG_USB=y
CONFIG_MEDIA_CONTROLLER=y
CONFIG_MEDIA_SUPPORT=y
CONFIG_VIDEO_AU0828=m

CONFIG_USB=y
CONFIG_MEDIA_CONTROLLER=y
CONFIG_MEDIA_SUPPORT=y
CONFIG_VIDEO_AU0828=y

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years agoperf/x86/amd/iommu: Do not register a task ctx for uncore like PMUs
Peter Zijlstra [Sat, 23 Apr 2016 22:42:55 +0000 (00:42 +0200)]
perf/x86/amd/iommu: Do not register a task ctx for uncore like PMUs

The new sanity check introduced by:

  26657848502b ("perf/core: Verify we have a single perf_hw_context PMU")

... triggered on the AMD IOMMU driver.

IOMMUs are not per logical CPU, they cannot have per-task counters. Fix it.

Reported-by: Borislav Petkov <bp@alien8.de>
Tested-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: jroedel@suse.de
Cc: suravee.suthikulpanit@amd.com
Link: http://lkml.kernel.org/r/20160423224255.GB3430@twins.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
8 years agox86/platform/UV: Bring back the call to map_low_mmrs in uv_system_init
Alex Thorlton [Wed, 4 May 2016 22:39:52 +0000 (17:39 -0500)]
x86/platform/UV: Bring back the call to map_low_mmrs in uv_system_init

A while back the following commit:

  d394f2d9d8e1 ("x86/platform/UV: Remove EFI memmap quirk for UV2+")

changed uv_system_init() to only call map_low_mmrs() on older UV1 hardware,
which requires EFI_OLD_MEMMAP to be set in order to boot.

The recent changes to the EFI memory mapping code in:

  d2f7cbe7b26a ("x86/efi: Runtime services virtual mapping")

exposed some issues with the fact that we were relying on the EFI memory
mapping mechanisms to map in our MMRs for us, after commit d394f2d9d8e1.

Rather than revert the entire commit and go back to forcing
EFI_OLD_MEMMAP on all UVs, we're going to add the call to map_low_mmrs()
back into uv_system_init(), and then fix up our EFI runtime calls to use
the appropriate page table.

For now, UV2+ will still need efi=old_map to boot, but there will be
other changes soon that should eliminate the need for this.

Signed-off-by: Alex Thorlton <athorlton@sgi.com>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Adam Buchbinder <adam.buchbinder@gmail.com>
Cc: Len Brown <len.brown@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Russ Anderson <rja@sgi.com>
Cc: Dimitri Sivanich <sivanich@sgi.com>
Link: http://lkml.kernel.org/r/1462401592-120735-1-git-send-email-athorlton@sgi.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
8 years agoperf/x86: Add model numbers for Kabylake CPUs
Andi Kleen [Sat, 30 Apr 2016 00:55:48 +0000 (17:55 -0700)]
perf/x86: Add model numbers for Kabylake CPUs

Everything the same as Skylake, just new model numbers.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1461977748-17616-1-git-send-email-andi@firstfloor.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
8 years agoMerge tag 'drm-intel-fixes-2016-05-02' of git://anongit.freedesktop.org/drm-intel...
Dave Airlie [Thu, 5 May 2016 02:12:09 +0000 (12:12 +1000)]
Merge tag 'drm-intel-fixes-2016-05-02' of git://anongit.freedesktop.org/drm-intel into drm-fixes

i915 fixes for 4.6. A bit more than I'd like at this stage, but
OTOH they're all stable material.

* tag 'drm-intel-fixes-2016-05-02' of git://anongit.freedesktop.org/drm-intel:
  drm/i915: Make RPS EI/thresholds multiple of 25 on SNB-BDW
  drm/i915: Fake HDMI live status
  drm/i915: Fix eDP low vswing for Broadwell
  drm/i915/ddi: Fix eDP VDD handling during booting and suspend/resume
  drm/i915: Fix system resume if PCI device remained enabled
  drm/i915: Avoid stalling on pending flips for legacy cursor updates

8 years agoMerge branch 'drm-fixes-4.6' of git://people.freedesktop.org/~agd5f/linux into drm...
Dave Airlie [Thu, 5 May 2016 00:37:25 +0000 (10:37 +1000)]
Merge branch 'drm-fixes-4.6' of git://people.freedesktop.org/~agd5f/linux into drm-fixes

two fixes for hw lockups and one for a double free

* 'drm-fixes-4.6' of git://people.freedesktop.org/~agd5f/linux:
  drm/amdgpu: make sure vertical front porch is at least 1
  drm/radeon: make sure vertical front porch is at least 1
  drm/amdgpu: set metadata pointer to NULL after freeing.

8 years agogpu: ipu-v3: Fix imx-ipuv3-crtc module autoloading
Philipp Zabel [Wed, 27 Apr 2016 08:17:51 +0000 (10:17 +0200)]
gpu: ipu-v3: Fix imx-ipuv3-crtc module autoloading

If of_node is set before calling platform_device_add, the driver core
will try to use of: modalias matching, which fails because the device
tree nodes don't have a compatible property set. This patch fixes
imx-ipuv3-crtc module autoloading by setting the of_node property only
after the platform modalias is set.

Fixes: 304e6be652e2 ("gpu: ipu-v3: Assign of_node of child platform devices to corresponding ports")
Reported-by: Dennis Gilmore <dennis@ausil.us>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Tested-By: Dennis Gilmore <dennis@ausil.us>
Cc: stable@vger.kernel.org # 4.4+
Signed-off-by: Dave Airlie <airlied@redhat.com>
8 years agoPM / OPP: Remove useless check
Viresh Kumar [Wed, 4 May 2016 13:19:55 +0000 (18:49 +0530)]
PM / OPP: Remove useless check

Regulators are optional for devices using OPPs and the OPP core
shouldn't be printing any errors for such missing regulators.

It was fine before the commit 0c717d0f9cb4, but that failed to update
this part of the code to remove an 'always true' check and an extra
unwanted print message.

Fix that now.

Fixes: 0c717d0f9cb4 (PM / OPP: Initialize regulator pointer to an error value)
Reported-by: Marc Gonzalez <marc_gonzalez@sigmadesigns.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
8 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Linus Torvalds [Wed, 4 May 2016 23:07:50 +0000 (16:07 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/dtor/input

Pull input fixes from Dmitry Torokhov.

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: atmel_mxt_ts - use mxt_acquire_irq in mxt_soft_reset
  Input: zforce_ts - fix dual touch recognition
  Input: twl6040-vibra - fix atomic schedule panic

8 years agoasm-generic: use compat version for preadv2 and pwritev2
Yury Norov [Mon, 2 May 2016 16:12:47 +0000 (19:12 +0300)]
asm-generic: use compat version for preadv2 and pwritev2

Compat architectures that does not use generic unistd (mips, s390),
declare compat version in their syscall tables for preadv2 and
pwritev2. Generic unistd syscall table should do it as well.

[arnd: this initially slipped through the review and an
 incorrect patch got merged. arch/tile/ is the only architecture
 that could be affected for their 32-bit compat mode, every
 other architecture we support today is fine.]

Signed-off-by: Yury Norov <ynorov@caviumnetworks.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
8 years agoACPI / osi: Collect _OSI handling into one single file
Lv Zheng [Tue, 3 May 2016 08:49:01 +0000 (16:49 +0800)]
ACPI / osi: Collect _OSI handling into one single file

_OSI handling code grows giant and it's time to move them into one file.

This patch collects all _OSI handling code into one single file.
So that we only have the following functions to be used externally:

 early_acpi_osi_init(): Used by DMI detections;
 acpi_osi_init(): Used to initialize OSI command line settings and install
                  Linux specific _OSI handler;
 acpi_osi_setup(): The API that should be used by the external quirks.
 acpi_osi_is_win8(): The API is used by the external drivers to determine
                     if BIOS supports Win8.

CONFIG_DMI is not useful as stub dmi_check_system() can make everything
stub because of strip.

No functional changes.

Tested-by: Lukas Wunner <lukas@wunner.de>
Tested-by: Chen Yu <yu.c.chen@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
8 years agoACPI / osi: Cleanup coding style issues before creating a separate OSI source file
Lv Zheng [Tue, 3 May 2016 08:48:53 +0000 (16:48 +0800)]
ACPI / osi: Cleanup coding style issues before creating a separate OSI source file

This patch performs necessary cleanups before moving OSI support to
another file.

 1. Change printk into pr_xxx
 2. Do not initialize values to 0
 3. Do not append additional "return" at the end of the function
 4. Remove useless comments which may easily break line breaking rule

After fixing the coding style issues, rename functions to make them looking
like acpi_osi_xxx.

No functional changes.

Tested-by: Lukas Wunner <lukas@wunner.de>
Tested-by: Chen Yu <yu.c.chen@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
8 years agoACPI / osi: Cleanup OSI handling code to use bool
Lv Zheng [Tue, 3 May 2016 08:48:46 +0000 (16:48 +0800)]
ACPI / osi: Cleanup OSI handling code to use bool

This patch changes "int/unsigned int" to "bool" to simplify the code.

Tested-by: Lukas Wunner <lukas@wunner.de>
Tested-by: Chen Yu <yu.c.chen@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
8 years agoACPI / osi: Fix default _OSI(Darwin) support
Chen Yu [Tue, 3 May 2016 08:48:39 +0000 (16:48 +0800)]
ACPI / osi: Fix default _OSI(Darwin) support

The following commit always reports positive value when Apple hardware
queries _OSI("Darwin"):

 Commit: 7bc5a2bad0b8d9d1ac9f7b8b33150e4ddf197334
 Subject: ACPI: Support _OSI("Darwin") correctly

However since this implementation places the judgement in runtime, it
breaks acpi_osi=!Darwin and cannot return unsupported for _OSI("WinXXX")
invoked before invoking _OSI("Darwin").

This patch fixes the issues by reverting the wrong support and implementing
the default behavior of _OSI("Darwin")/_OSI("WinXXX") on Apple hardware via
DMI matching.

Fixes: 7bc5a2bad0b8 (ACPI: Support _OSI("Darwin") correctly)
Link: https://bugzilla.kernel.org/show_bug.cgi?id=92111
Reported-and-tested-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
8 years agoACPI / osi: Add acpi_osi=!! to allow reverting acpi_osi=!
Lv Zheng [Tue, 3 May 2016 08:48:32 +0000 (16:48 +0800)]
ACPI / osi: Add acpi_osi=!! to allow reverting acpi_osi=!

This patch introduces acpi_osi=!! so that quirks may use it to revert
acpi_osi=!.

Tested-by: Lukas Wunner <lukas@wunner.de>
Tested-by: Chen Yu <yu.c.chen@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
8 years agoACPI / osi: Cleanup _OSI("Linux") related code before introducing new support
Lv Zheng [Tue, 3 May 2016 08:48:27 +0000 (16:48 +0800)]
ACPI / osi: Cleanup _OSI("Linux") related code before introducing new support

This patch cleans up OSI code in osl.c to make osi_linux work for OSI
strings other than "Linux", so it can be re-used for other purposes.

Tested-by: Lukas Wunner <lukas@wunner.de>
Tested-by: Chen Yu <yu.c.chen@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
8 years agoACPI / osi: Fix an issue that acpi_osi=!* cannot disable ACPICA internal strings
Lv Zheng [Tue, 3 May 2016 08:48:20 +0000 (16:48 +0800)]
ACPI / osi: Fix an issue that acpi_osi=!* cannot disable ACPICA internal strings

The order of the _OSI related functionalities is as follows:

  acpi_blacklisted()
    acpi_dmi_osi_linux()
      acpi_osi_setup()
    acpi_osi_setup()
      acpi_update_interfaces() if "!*"
      <<<<<<<<<<<<<<<<<<<<<<<<
  parse_args()
    __setup("acpi_osi=")
      acpi_osi_setup_linux()
        acpi_update_interfaces() if "!*"
        <<<<<<<<<<<<<<<<<<<<<<<<
  acpi_early_init()
    acpi_initialize_subsystem()
      acpi_ut_initialize_interfaces()
      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  acpi_bus_init()
    acpi_os_initialize1()
      acpi_install_interface_handler(acpi_osi_handler)
      acpi_osi_setup_late()
        acpi_update_interfaces() for "!"
        >>>>>>>>>>>>>>>>>>>>>>>>
  acpi_osi_handler()

Since acpi_osi_setup_linux() can override acpi_dmi_osi_linux(), the command
line setting can override the DMI detection. That's why acpi_blacklisted()
is put before __setup("acpi_osi=").

Then we can notice the following wrong invocation order. There are
acpi_update_interfaces() (marked by <<<<) calls invoked before
acpi_ut_initialize_interfaces() (marked by ^^^^). This makes it impossible
to use acpi_osi=!* correctly from OSI DMI table or from the command line.
The use of acpi_osi=!* is meant to disable both ACPICA
(acpi_gbl_supported_interfaces) and Linux specific strings
(osi_setup_entries) while the ACPICA part should have stopped working
because of the order issue.

This patch fixes this issue by moving acpi_update_interfaces() to where
it is invoked for acpi_osi=! (marked by >>>>) as this is ensured to be
invoked after acpi_ut_initialize_interfaces() (marked by ^^^^). Linux
specific strings are still handled in the original place in order to make
the following command line working: acpi_osi=!* acpi_osi="Module Device".

Note that since acpi_osi=!* is meant to further disable linux specific
string comparing to the acpi_osi=!, there is no such use case in our bug
fixing work and hence there is no one using acpi_osi=!* either from the
command line or from the DMI quirks, this issue is just a theoretical
issue.

Fixes: 741d81280ad2 (ACPI: Add facility to remove all _OSI strings)
Cc: 3.12+ <stable@vger.kernel.org> # 3.12+
Tested-by: Lukas Wunner <lukas@wunner.de>
Tested-by: Chen Yu <yu.c.chen@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
8 years agoACPI/video: export acpi_video_get_levels
Aaron Lu [Wed, 27 Apr 2016 12:45:04 +0000 (20:45 +0800)]
ACPI/video: export acpi_video_get_levels

The acpi_video_get_levels is useful for other drivers, i.e. the
to-be-added int3406 thermal driver, so export it.

Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
8 years agovideo / backlight: remove the backlight_device_registered API
Aaron Lu [Wed, 27 Apr 2016 12:45:03 +0000 (20:45 +0800)]
video / backlight: remove the backlight_device_registered API

Since we will need the backlight_device_get_by_type API, we can use it
instead of the backlight_device_registered API whenever necessary so
remove the backlight_device_registered API.

Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Acked-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
8 years agovideo / backlight: add two APIs for drivers to use
Aaron Lu [Wed, 27 Apr 2016 12:45:02 +0000 (20:45 +0800)]
video / backlight: add two APIs for drivers to use

It is useful to get the backlight device's pointer and use it to set
backlight in some cases(the following patch will make use of it) so add
the two APIs and export them.

Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Acked-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
8 years agoACPICA: Dispatcher: Update thread ID for recursive method calls
Prarit Bhargava [Wed, 4 May 2016 05:48:56 +0000 (13:48 +0800)]
ACPICA: Dispatcher: Update thread ID for recursive method calls

ACPICA commit 7a3bd2d962f221809f25ddb826c9e551b916eb25

Set the mutex owner thread ID.
Original patch from: Prarit Bhargava <prarit@redhat.com>

Link: https://bugzilla.kernel.org/show_bug.cgi?id=115121
Link: https://github.com/acpica/acpica/commit/7a3bd2d9
Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Tested-by: Andy Lutomirski <luto@kernel.org> # On a Dell XPS 13 9350
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Cc: All applicable <stable@vger.kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
8 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris...
Linus Torvalds [Wed, 4 May 2016 18:14:00 +0000 (11:14 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/jmorris/linux-security

Pull IMA fix from James Morris.

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security:
  ima: fix the string representation of the LSM/IMA hook enumeration ordering

8 years agoMerge tag 'for-linus-4.6-rc6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Wed, 4 May 2016 18:00:05 +0000 (11:00 -0700)]
Merge tag 'for-linus-4.6-rc6-tag' of git://git./linux/kernel/git/xen/tip

Pull xen regression fixes from David Vrabel:

 - Fix two regressions causing crashes in 32-bit PV guests

 - Fix a regression in the evtchn driver

* tag 'for-linus-4.6-rc6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen/evtchn: fix ring resize when binding new events
  xen/balloon: Fix crash when ballooning on x86 32 bit PAE
  xen: Fix page <-> pfn conversion on 32 bit systems

8 years agoxen/evtchn: fix ring resize when binding new events
Jan Beulich [Wed, 4 May 2016 13:02:36 +0000 (07:02 -0600)]
xen/evtchn: fix ring resize when binding new events

The copying of ring data was wrong for two cases: For a full ring
nothing got copied at all (as in that case the canonicalized producer
and consumer indexes are identical). And in case one or both of the
canonicalized (after the resize) indexes would point into the second
half of the buffer, the copied data ended up in the wrong (free) part
of the new buffer. In both cases uninitialized data would get passed
back to the caller.

Fix this by simply copying the old ring contents twice: Once to the
low half of the new buffer, and a second time to the high half.

This addresses the inability to boot a HVM guest with 64 or more
vCPUs.  This regression was caused by 8620015499101090 (xen/evtchn:
dynamically grow pending event channel ring).

Reported-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Cc: <stable@vger.kernel.org> # 4.4+
Signed-off-by: David Vrabel <david.vrabel@citrix.com>