platform/kernel/linux-starfive.git
9 years agodrm/mgag200: constify all struct drm_*_helper funcs pointers
Jani Nikula [Wed, 11 Mar 2015 09:51:00 +0000 (11:51 +0200)]
drm/mgag200: constify all struct drm_*_helper funcs pointers

They are not to be modified.

Generated using the semantic patch:

@@
@@
(
  const struct drm_crtc_helper_funcs *
|
- struct drm_crtc_helper_funcs *
+ const struct drm_crtc_helper_funcs *
)

@@
@@
(
  const struct drm_encoder_helper_funcs *
|
- struct drm_encoder_helper_funcs *
+ const struct drm_encoder_helper_funcs *
)

@@
@@
(
  const struct drm_connector_helper_funcs *
|
- struct drm_connector_helper_funcs *
+ const struct drm_connector_helper_funcs *
)

@@
@@
(
  const struct drm_plane_helper_funcs *
|
- struct drm_plane_helper_funcs *
+ const struct drm_plane_helper_funcs *
)

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/exynos: constify all struct drm_*_helper funcs pointers
Jani Nikula [Wed, 11 Mar 2015 09:50:59 +0000 (11:50 +0200)]
drm/exynos: constify all struct drm_*_helper funcs pointers

They are not to be modified.

Generated using the semantic patch:

@@
@@
(
  const struct drm_crtc_helper_funcs *
|
- struct drm_crtc_helper_funcs *
+ const struct drm_crtc_helper_funcs *
)

@@
@@
(
  const struct drm_encoder_helper_funcs *
|
- struct drm_encoder_helper_funcs *
+ const struct drm_encoder_helper_funcs *
)

@@
@@
(
  const struct drm_connector_helper_funcs *
|
- struct drm_connector_helper_funcs *
+ const struct drm_connector_helper_funcs *
)

@@
@@
(
  const struct drm_plane_helper_funcs *
|
- struct drm_plane_helper_funcs *
+ const struct drm_plane_helper_funcs *
)

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm: Fix some typos
John Hunter [Tue, 7 Apr 2015 11:38:50 +0000 (19:38 +0800)]
drm: Fix some typos

Signed-off-by: John Hunter <zhjwpku@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/vgem: implement virtual GEM
Zach Reizner [Thu, 5 Mar 2015 00:33:41 +0000 (16:33 -0800)]
drm/vgem: implement virtual GEM

This patch implements the virtual GEM driver with PRIME sharing which
allows vgem to import a gem object from other drivers for the purpose
of mmap-ing them to userspace. The mmap is done using the mmap
operation exported by other drivers.

v2: remove platform_device and do not attach to dma bufs
v3: use drm helpers for get/put pages
v4: correct dumb create pitch

Reviewed-by: Rob Clark <robdclark@gmail.com> (v3)
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org> (v3)
Signed-off-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Zach Reizner <zachr@google.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
9 years agodrm/bochs: disable video before changing video mode
Chris Ruffin [Tue, 24 Mar 2015 20:57:42 +0000 (16:57 -0400)]
drm/bochs: disable video before changing video mode

qemu and simics simulators both seem to expect that video should be disabled
before changing the video mode.

references:
http://git.qemu.org/?p=qemu.git;a=blob;f=hw/display/vga.c;h=c0f7b343bbab586c8593d29c7a765f1e6ca3662c;hb=HEAD#l727
http://wiki.osdev.org/Bochs_VBE_Extensions#Setting_display_resolution_and_bit_depth

Signed-off-by: Chris Ruffin <chris.ruffin@intel.com>
Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
9 years agoMerge tag 'topic/drm-misc-2015-03-31' of git://anongit.freedesktop.org/drm-intel...
Dave Airlie [Tue, 31 Mar 2015 22:23:25 +0000 (08:23 +1000)]
Merge tag 'topic/drm-misc-2015-03-31' of git://anongit.freedesktop.org/drm-intel into drm-next

Final drm-misc pull for 4.0, just various things all over, including a few
more important atomic fixes. btw I didn't pick up the vmwgfx patch from
Ville's series, but one patch has one hunk touching vmwgfx and
Thomas/Jakob didn't get around to ack it. I figured it's simple enough to
be ok though.

* tag 'topic/drm-misc-2015-03-31' of git://anongit.freedesktop.org/drm-intel:
  drm: line wrap DRM_IOCTL_DEF* macros
  drm/atomic: Don't try to free a NULL state
  drm/atomic: Clear crtcs, connectors and planes when clearing state
  drm: Rewrite drm_ioctl_flags() to resemble the new drm_ioctl() code
  drm: Use max() to make the ioctl alloc size code cleaner
  drm: Simplify core vs. drv ioctl handling
  drm: Drop ioctl->cmd_drv
  drm: Fix DRM_IOCTL_DEF_DRV()
  drm/atomic-helpers: Properly avoid full modeset dance
  drm: atomic: Allow setting CRTC active property
  drm: atomic: Expose CRTC active property
  drm: crtc_helper: Update hwmode before mode_set call
  drm: mode: Allow NULL modes for equality check
  drm: fb_helper: Simplify exit condition
  drm: mode: Fix typo in kerneldoc
  drm/dp: Print the number of bytes processed for aux nacks

9 years agoMerge tag 'drm-intel-next-2015-03-27-merge' of git://anongit.freedesktop.org/drm...
Dave Airlie [Tue, 31 Mar 2015 22:21:46 +0000 (08:21 +1000)]
Merge tag 'drm-intel-next-2015-03-27-merge' of git://anongit.freedesktop.org/drm-intel into drm-next

This backmerges 4.0-rc6 due to the recent fixes in rc5/6

- DP link rate refactoring from Ville
- byt/bsw rps tuning from Chris
- kerneldoc for the shrinker code
- more dynamic ppgtt pte work (Michel, Ben, ...)
- vlv dpll code refactoring to prep fro bxt (Imre)
- refactoring the sprite colorkey code (Ville)
- rotated ggtt view support from Tvrtko
- roll out struct drm_atomic_state to prep for atomic update (Ander)

* tag 'drm-intel-next-2015-03-27-merge' of git://anongit.freedesktop.org/drm-intel: (473 commits)
  Linux 4.0-rc6
  arm64: juno: Fix misleading name of UART reference clock
  drm/i915: Update DRIVER_DATE to 20150327
  drm/i915: Skip allocating shadow batch for 0-length batches
  drm/i915: Handle error to get connector state when staging config
  drm/i915: Compare GGTT view structs instead of types
  drm/i915: fix simple_return.cocci warnings
  drm/i915: Add module param to test the load detect code
  drm/i915: Remove usage of encoder->new_crtc from clock computations
  drm/i915: Don't look at staged config crtc when changing DRRS state
  drm/i915: Convert intel_pipe_will_have_type() to using atomic state
  drm/i915: Pass an atomic state to modeset_global_resources() functions
  drm/i915: Add dynamic page trace events
  drm/i915: Finish gen6/7 dynamic page table allocation
  drm/i915: Remove unnecessary gen6_ppgtt_unmap_pages
  drm/i915: Fix i915_dma_map_single positive error code
  drm/i915: Prevent out of range pt in gen6_for_each_pde
  drm/i915: fix definition of the DRM_IOCTL_I915_GET_SPRITE_COLORKEY ioctl
  drm/i915: Rip out GET_SPRITE_COLORKEY ioctl
  watchdog: imgpdc: Fix default heartbeat
  ...

9 years agodrm: line wrap DRM_IOCTL_DEF* macros
Emil Velikov [Mon, 30 Mar 2015 17:10:36 +0000 (17:10 +0000)]
drm: line wrap DRM_IOCTL_DEF* macros

Improve the readability and keeps the lines shorter than 80 columns.

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agoMerge branch 'drm-atmel-hlcdc-4.1-fixes' of git://github.com/bbrezillon/linux-at91...
Dave Airlie [Tue, 31 Mar 2015 03:38:01 +0000 (13:38 +1000)]
Merge branch 'drm-atmel-hlcdc-4.1-fixes' of git://github.com/bbrezillon/linux-at91 into drm-next

add PM fix.

* 'drm-atmel-hlcdc-4.1-fixes' of git://github.com/bbrezillon/linux-at91:
  drm: atmel-hlcdc: use appropriate enabled flag in suspend/resume

9 years agoMerge tag 'drm-amdkfd-next-2015-03-25' of git://people.freedesktop.org/~gabbayo/linux...
Dave Airlie [Tue, 31 Mar 2015 03:36:25 +0000 (13:36 +1000)]
Merge tag 'drm-amdkfd-next-2015-03-25' of git://people.freedesktop.org/~gabbayo/linux into drm-next

- Allow amdkfd to work with multiple kgd instances. This is in preparation for
  AMD's new open source kernel graphic driver (amdgpu), and for the new
  AMD APU, Carrizo.

- Convert timestamping to use 64bit time accessors

- Three other minor changes.

* tag 'drm-amdkfd-next-2015-03-25' of git://people.freedesktop.org/~gabbayo/linux:
  drm/amdkfd: Add multiple kgd support
  drm/amdkfd: Convert timestamping to use 64bit time accessors
  drm/amdkfd: add debug prints for process teardown
  drm/amdkfd: Remove unused field from struct qcm_process_device
  drm/amdkfd: rename fence_wait_timeout

9 years agodrm/atomic: Don't try to free a NULL state
Ander Conselvan de Oliveira [Mon, 30 Mar 2015 11:05:43 +0000 (14:05 +0300)]
drm/atomic: Don't try to free a NULL state

Consistently with other free functions, handle the NULL case without
oopsing.

Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agoMerge tag 'v4.0-rc6' into drm-intel-next
Daniel Vetter [Mon, 30 Mar 2015 14:37:08 +0000 (16:37 +0200)]
Merge tag 'v4.0-rc6' into drm-intel-next

Backmerge Linux 4.0-rc6 because conflicts are (again) getting out of
hand. To make sure we don't lose any bugfixes from the 4.0-rc5-rc6
flurry of patches we've applied them all to -next too.

Conflicts:
drivers/gpu/drm/i915/intel_display.c

Always take the version from -next, we've already handled all
conflicts with explicit cherrypicking.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm/atomic: Clear crtcs, connectors and planes when clearing state
Ander Conselvan de Oliveira [Mon, 30 Mar 2015 07:41:19 +0000 (10:41 +0300)]
drm/atomic: Clear crtcs, connectors and planes when clearing state

Users of the atomic state assume that if the pointer to a crtc, plane or
connector is not NULL in the respective object vector, than the state
for that object in *_states vector also won't be NULL. That assumption
was broken by drm_atomic_state_clear(), which would clear the state
pointer but leave the pointer to the object still set.

This fixes a NULL pointer dereference in i915 caused by the use of
drm_atomic_state_clear().

Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agoLinux 4.0-rc6
Linus Torvalds [Sun, 29 Mar 2015 22:26:31 +0000 (15:26 -0700)]
Linux 4.0-rc6

9 years agoMerge tag 'armsoc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm...
Linus Torvalds [Sun, 29 Mar 2015 22:09:31 +0000 (15:09 -0700)]
Merge tag 'armsoc-for-linus' of git://git./linux/kernel/git/arm/arm-soc

Pull ARM SoC fixes from Olof Johansson:
 "The latest and greatest fixes for ARM platform code.  Worth pointing
  out are:

   - Lines-wise, largest is a PXA fix for dealing with interrupts on DT
     that was quite broken.  It's still newish code so while we could
     have held this off, it seemed appropriate to include now

   - Some GPIO fixes for OMAP platforms added a few lines.  This was
     also fixes for code recently added (this release).

   - Small OMAP timer fix to behave better with partially upstreamed
     platforms, which is quite welcome.

   - Allwinner fixes about operating point control, reducing
     overclocking in some cases for better stability.

  plus a handful of other smaller fixes across the map"

* tag 'armsoc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  arm64: juno: Fix misleading name of UART reference clock
  ARM: dts: sunxi: Remove overclocked/overvoltaged OPP
  ARM: dts: sun4i: a10-lime: Override and remove 1008MHz OPP setting
  ARM: socfpga: dts: fix spi1 interrupt
  ARM: dts: Fix gpio interrupts for dm816x
  ARM: dts: dra7: remove ti,hwmod property from pcie phy
  ARM: OMAP: dmtimer: disable pm runtime on remove
  ARM: OMAP: dmtimer: check for pm_runtime_get_sync() failure
  ARM: OMAP2+: Fix socbus family info for AM33xx devices
  ARM: dts: omap3: Add missing dmas for crypto
  ARM: dts: rockchip: disable gmac by default in rk3288.dtsi
  MAINTAINERS: add rockchip regexp to the ARM/Rockchip entry
  ARM: pxa: fix pxa interrupts handling in DT
  ARM: pxa: Fix typo in zeus.c
  ARM: sunxi: Have ARCH_SUNXI select RESET_CONTROLLER for clock driver usage

9 years agoMerge tag 'sunxi-fixes-for-4.0' of https://git.kernel.org/pub/scm/linux/kernel/git...
Olof Johansson [Sun, 29 Mar 2015 21:00:53 +0000 (14:00 -0700)]
Merge tag 'sunxi-fixes-for-4.0' of https://git./linux/kernel/git/mripard/linux into fixes

Allwinner fixes for 4.0

There's a few fixes to merge for 4.0, one to add a select in the machine
Kconfig option to fix a potential build failure, and two fixing cpufreq related
issues.

* tag 'sunxi-fixes-for-4.0' of https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux:
  ARM: dts: sunxi: Remove overclocked/overvoltaged OPP
  ARM: dts: sun4i: a10-lime: Override and remove 1008MHz OPP setting
  ARM: sunxi: Have ARCH_SUNXI select RESET_CONTROLLER for clock driver usage

Signed-off-by: Olof Johansson <olof@lixom.net>
9 years agoMerge tag 'fixes-v4.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind...
Olof Johansson [Sun, 29 Mar 2015 20:58:54 +0000 (13:58 -0700)]
Merge tag 'fixes-v4.0-rc4' of git://git./linux/kernel/git/tmlind/linux-omap into fixes

Fixes for omaps for the -rc cycle:

- Fix a device tree based booting vs legacy booting regression for
  omap3 crypto hardware by adding the missing DMA channels.

- Fix /sys/bus/soc/devices/soc0/family for am33xx devices.

- Fix two timer issues that can cause hangs if the timer related
  hwmod data is missing like it often initially is for new SoCs.

- Remove pcie hwmods entry from dts as that causes runtime PM to
  fail for the PHYs.

- A paper bag type dts configuration fix for dm816x GPIO
  interrupts that I just noticed. This is most of the changes
  diffstat wise, but as it's a basic feature for connecting
  devices and things work otherwise, it should be fixed.

* tag 'fixes-v4.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
  ARM: dts: Fix gpio interrupts for dm816x
  ARM: dts: dra7: remove ti,hwmod property from pcie phy
  ARM: OMAP: dmtimer: disable pm runtime on remove
  ARM: OMAP: dmtimer: check for pm_runtime_get_sync() failure
  ARM: OMAP2+: Fix socbus family info for AM33xx devices
  ARM: dts: omap3: Add missing dmas for crypto

Signed-off-by: Olof Johansson <olof@lixom.net>
9 years agoMerge tag 'socfpga_fix_for_v4.0_2' of git://git.rocketboards.org/linux-socfpga-next...
Olof Johansson [Sun, 29 Mar 2015 20:58:04 +0000 (13:58 -0700)]
Merge tag 'socfpga_fix_for_v4.0_2' of git://git.rocketboards.org/linux-socfpga-next into fixes

Late fix for v4.0 on the SoCFPGA platform:
- Fix interrupt number for SPI1 interface

* tag 'socfpga_fix_for_v4.0_2' of git://git.rocketboards.org/linux-socfpga-next:
  ARM: socfpga: dts: fix spi1 interrupt

Signed-off-by: Olof Johansson <olof@lixom.net>
9 years agoarm64: juno: Fix misleading name of UART reference clock
Dave Martin [Tue, 17 Mar 2015 12:35:41 +0000 (12:35 +0000)]
arm64: juno: Fix misleading name of UART reference clock

The UART reference clock speed is 7273.8 kHz, not 72738 kHz.

Dots aren't usually used in node names even though ePAPR permits
them.  However, this can easily be avoided by expressing the
frequency in Hz, not kHz.

This patch changes the name to refclk7273800hz, reflecting the
actual clock speed.

Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Acked-by: Liviu Dudau <Liviu.Dudau@arm.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
9 years agoMerge tag 'fixes-for-v4.0-rc5' of https://github.com/rjarzmik/linux into fixes
Olof Johansson [Sun, 29 Mar 2015 20:47:21 +0000 (13:47 -0700)]
Merge tag 'fixes-for-v4.0-rc5' of https://github.com/rjarzmik/linux into fixes

arm: pxa: fixes for v4.0-rc5

There are only 2 fixes, one for the zeus board about the regulator changes,
where a typo prevented the zeus board from having a working can regulator,
and one regression triggered by the interrupts IRQ shift of 16 affecting all
boards.

* tag 'fixes-for-v4.0-rc5' of https://github.com/rjarzmik/linux:
  ARM: pxa: fix pxa interrupts handling in DT
  ARM: pxa: Fix typo in zeus.c

Signed-off-by: Olof Johansson <olof@lixom.net>
9 years agoMerge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 28 Mar 2015 18:25:04 +0000 (11:25 -0700)]
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86 fix from Ingo Molnar:
 "Fix x86 syscall exit code bug that resulted in spurious non-execution
  of TIF-driven user-return worklets, causing big trouble for things
  like KVM that rely on user notifiers for correctness of their vcpu
  model, causing crashes like double faults"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/asm/entry: Check for syscall exit work with IRQs disabled

9 years agoMerge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 28 Mar 2015 18:21:23 +0000 (11:21 -0700)]
Merge branch 'timers-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull timer fixes from Ingo Molnar:
 "Two clocksource driver fixes, and an idle loop RCU warning fix"

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  clocksource/drivers/sun5i: Fix cpufreq interaction with sched_clock()
  clocksource/drivers: Fix various !CONFIG_HAS_IOMEM build errors
  timers/tick/broadcast-hrtimer: Fix suspicious RCU usage in idle loop

9 years agoMerge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 28 Mar 2015 18:17:32 +0000 (11:17 -0700)]
Merge branch 'sched-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull scheduler fix from Ingo Molnar:
 "A single sched/rt corner case fix for RLIMIT_RTIME correctness"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched: Fix RLIMIT_RTTIME when PI-boosting to RT

9 years agoMerge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 28 Mar 2015 18:12:08 +0000 (11:12 -0700)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull perf fix from Ingo Molnar:
 "A perf kernel side fix for a fuzzer triggered lockup"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf: Fix irq_work 'tail' recursion

9 years agoMerge branch 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 28 Mar 2015 18:05:03 +0000 (11:05 -0700)]
Merge branch 'locking-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull locking fix from Ingo Molnar:
 "A module unload lockdep race fix"

* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  lockdep: Fix the module unload key range freeing logic

9 years agoMerge branch 'parisc-4.0-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller...
Linus Torvalds [Sat, 28 Mar 2015 17:58:53 +0000 (10:58 -0700)]
Merge branch 'parisc-4.0-1' of git://git./linux/kernel/git/deller/parisc-linux

Pull parsic fixes from Helge Deller:
 "One patch from Mikulas fixes a bug on parisc by artifically
  incrementing the counter in pmd_free when the kernel tries to free
  the preallocated pmd.

  Other than that we now prevent that syscalls gets added without
  incrementing __NR_Linux_syscalls and fix the initial pmd setup code
  if a default page size greater than 4k has been selected"

* 'parisc-4.0-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: Fix pmd code to depend on PT_NLEVELS value, not on CONFIG_64BIT
  parisc: mm: don't count preallocated pmds
  parisc: Add compile-time check when adding new syscalls

9 years agoMerge git://git.kernel.org/pub/scm/virt/kvm/kvm
Linus Torvalds [Sat, 28 Mar 2015 17:54:59 +0000 (10:54 -0700)]
Merge git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull kvm ppc bugfixes from Marcelo Tosatti.

* git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: PPC: Book3S HV: Fix instruction emulation
  KVM: PPC: Book3S HV: Endian fix for accessing VPA yield count
  KVM: PPC: Book3S HV: Fix spinlock/mutex ordering issue in kvmppc_set_lpcr()

9 years agoMerge tag 'arc-4.0-fixes-part-2' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sat, 28 Mar 2015 17:47:27 +0000 (09:47 -0800)]
Merge tag 'arc-4.0-fixes-part-2' of git://git./linux/kernel/git/vgupta/arc

Pull ARC fixes from Vineet Gupta:
 "We found some issues with signal handling taking down the system.  I
  know its late, but these are important and all marked for stable.

  ARC signal handling related fixes uncovered during recent testing of
  NPTL tools"

* tag 'arc-4.0-fixes-part-2' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
  ARC: signal handling robustify
  ARC: SA_SIGINFO ucontext regs off-by-one

9 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris...
Linus Torvalds [Sat, 28 Mar 2015 17:41:22 +0000 (10:41 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/jmorris/linux-security

Pull selinux bugfix from James Morris.

Fix broken return value.

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security:
  selinux: fix sel_write_enforce broken return value

9 years agoMerge git://www.linux-watchdog.org/linux-watchdog
Linus Torvalds [Fri, 27 Mar 2015 21:45:42 +0000 (14:45 -0700)]
Merge git://www.linux-watchdog.org/linux-watchdog

Pull watchdog fixes from Wim Van Sebroeck:

 - mtk_wdt: signedness bug in mtk_wdt_start()

 - imgpdc: Fix NULL pointer dereference during probe and fix the default
   heartbeat

* git://www.linux-watchdog.org/linux-watchdog:
  watchdog: imgpdc: Fix default heartbeat
  watchdog: imgpdc: Fix probe NULL pointer dereference
  watchdog: mtk_wdt: signedness bug in mtk_wdt_start()

9 years agoMerge tag 'sound-4.0-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai...
Linus Torvalds [Fri, 27 Mar 2015 21:38:02 +0000 (14:38 -0700)]
Merge tag 'sound-4.0-rc6' of git://git./linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "Three trivial oneliner fixes for HD-audio.

  Two are device-specific quirks while one is a generic fix for recent
  Realtek codecs"

* tag 'sound-4.0-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda - Add one more node in the EAPD supporting candidate list
  ALSA: hda_intel: apply the Seperate stream_tag for Sunrise Point
  ALSA: hda - Add dock support for Thinkpad T450s (17aa:5036)

9 years agodrm/i915: Update DRIVER_DATE to 20150327
Daniel Vetter [Fri, 27 Mar 2015 19:21:01 +0000 (20:21 +0100)]
drm/i915: Update DRIVER_DATE to 20150327

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm: Rewrite drm_ioctl_flags() to resemble the new drm_ioctl() code
Ville Syrjälä [Fri, 27 Mar 2015 13:52:00 +0000 (15:52 +0200)]
drm: Rewrite drm_ioctl_flags() to resemble the new drm_ioctl() code

Use the same logic when checking for valid ioctl range in
drm_ioctl_flags() that is used in drm_ioctl() to avoid
confusion.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm: Use max() to make the ioctl alloc size code cleaner
Ville Syrjälä [Fri, 27 Mar 2015 13:51:59 +0000 (15:51 +0200)]
drm: Use max() to make the ioctl alloc size code cleaner

Use max() to make the code to determine the allocation size for
the ioctl data easier to read.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm: Simplify core vs. drv ioctl handling
Ville Syrjälä [Fri, 27 Mar 2015 13:51:58 +0000 (15:51 +0200)]
drm: Simplify core vs. drv ioctl handling

Now that cmd_drv is gone the handling for core and driver ioctls is
mostly identical, so eliminate the duplication. Also take the
opportunity to simplify the range checks to be less cluttered.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm: Drop ioctl->cmd_drv
Ville Syrjälä [Fri, 27 Mar 2015 13:51:56 +0000 (15:51 +0200)]
drm: Drop ioctl->cmd_drv

ioctl->cmd_drv is pointless and we can just as well stick the full ioctl
definition into ioctl->cmd.

Cc: Jakob Bornecrantz <jakob@vmware.com>
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm: Fix DRM_IOCTL_DEF_DRV()
Ville Syrjälä [Fri, 27 Mar 2015 13:51:55 +0000 (15:51 +0200)]
drm: Fix DRM_IOCTL_DEF_DRV()

Currently DRM_IOCTL_DEF_DRV does '[DRM_IOCTL_NR(DRM_##ioctl)]' which
doesn't make much sense since DRM_##ioctl is already a the raw ioctl
number. So change it to 'DRM_IOCTL_NR(DRM_IOCTL_##ioctl) - DRM_COMMAND_BASE'
which means the DRM_IOCTL_NR() now makes sense, and also this also means
if there's a mistake in the DRM_IOCTL_##ioctl macros we might get a
warning about it (eg. we would have gotten a sparse warning about the
i915 colorkey get/set ioctl being defined to be the same thing).

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Skip allocating shadow batch for 0-length batches
Chris Wilson [Fri, 27 Mar 2015 11:02:10 +0000 (11:02 +0000)]
drm/i915: Skip allocating shadow batch for 0-length batches

Since

commit 17cabf571e50677d980e9ab2a43c5f11213003ae
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Wed Jan 14 11:20:57 2015 +0000

    drm/i915: Trim the command parser allocations

we may then try to allocate a zero-sized object and attempt to extract
its pages. Understandably this fails.

Testcase: igt/gem_exec_nop #ivb,byt,hsw
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Handle error to get connector state when staging config
Ander Conselvan de Oliveira [Fri, 27 Mar 2015 13:33:51 +0000 (15:33 +0200)]
drm/i915: Handle error to get connector state when staging config

The return value of one of the calls to drm_atomic_get_connector_state()
in intel_modeset_stage_output_state() wasn't checked for errors.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Compare GGTT view structs instead of types
Joonas Lahtinen [Fri, 27 Mar 2015 11:09:22 +0000 (13:09 +0200)]
drm/i915: Compare GGTT view structs instead of types

To allow for views where the view type is not defined by the view type only,
like it is in stereo or rotated 90 degree view, change the semantic to require
the whole view structure for comparison when we match a GGTT view.

This allows including parameters like offset to be included in the view which
is useful for eg. partial views.

v3:
- Rely on ggtt_view type being 0 for non-GGTT vma's, which equals to
  I915_GGTT_VIEW_NORMAL. (Daniel Vetter)
- Do not use potentially slower comparison when we only want to know if
  something is or is not a normal view.
- Rebase on top of rotated view patches. Add rotated view singleton.
- If one view is missing in comparison they're equal only if both are missing.

v4:
- Use comparison helper in obj_to_ggtt_view too. (Tvrtko Ursulin)
- Do WARN_ON if one view is NULL. (Tvrtko Ursulin)

Cc: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: fix simple_return.cocci warnings
kbuild test robot [Fri, 27 Mar 2015 11:26:35 +0000 (19:26 +0800)]
drm/i915: fix simple_return.cocci warnings

drivers/gpu/drm/i915/i915_gem_gtt.c:1349:1-4: WARNING: end returns can be simpified and declaration on line 1347 can be dropped

 Simplify a trivial if-return sequence.  Possibly combine with a
 preceding function call.
Generated by: scripts/coccinelle/misc/simple_return.cocci

CC: Michel Thierry <michel.thierry@intel.com>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/atomic-helpers: Properly avoid full modeset dance
Daniel Vetter [Thu, 26 Mar 2015 21:18:40 +0000 (22:18 +0100)]
drm/atomic-helpers: Properly avoid full modeset dance

Legacy setCrtc has a nice fastpath for just updating the frontbuffer
when the output routing doesn't change. Which I of course tried to
keep working, except that I fumbled the job: The helpers correctly
compute ->mode_changed, CRTC updates get correctly skipped but
connector functions are called unconditionally.

Fix this.

v2: For the disable sided connector->state->crtc might be NULL.
Instead look at the old_connector_state->crtc, but still use the new
crtc state for that old crtc. Reported by Thierry.

Reported-and-Tested-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk> (v1)
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Gustavo Padovan <gustavo.padovan@collabora.co.uk> (v1)
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm/i915: Add module param to test the load detect code
Daniel Vetter [Tue, 3 Mar 2015 17:03:47 +0000 (18:03 +0100)]
drm/i915: Add module param to test the load detect code

This is useful for writing igts to make sure we don't break this,
without being forced to own a one of these dinosaurs.

Suggested-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Ander Conselvan de Oliveira <conselvan2@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Remove usage of encoder->new_crtc from clock computations
Ander Conselvan de Oliveira [Fri, 20 Mar 2015 14:18:19 +0000 (16:18 +0200)]
drm/i915: Remove usage of encoder->new_crtc from clock computations

Some of the crtc_compute_clock() still depended on encoder->new_crtc
since they didn't use intel_pipe_will_have_type() and used an open
coded version of that function instead. This patch replaces those with
the appropriate code that checks the atomic state intead.

Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
[danvet: Separate the if (!connector) continue to facility easier
extraction of a loop iterator for all of these (there's lots more in
i915 and atomic helpers).]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agoMerge branch 'upstream' of git://git.infradead.org/users/pcmoore/selinux into for...
James Morris [Fri, 27 Mar 2015 09:33:27 +0000 (20:33 +1100)]
Merge branch 'upstream' of git://git.infradead.org/users/pcmoore/selinux into for-linus

9 years agodrm/i915: Don't look at staged config crtc when changing DRRS state
Ander Conselvan de Oliveira [Fri, 20 Mar 2015 14:18:18 +0000 (16:18 +0200)]
drm/i915: Don't look at staged config crtc when changing DRRS state

The function intel_dp_set_drrs_state() would decide which pipe to
downclock based on the staged config for the given connector. However,
the result of that function is immediate, and it uses input values from
crtc->config, so it should be looking at the current crtc instead.

Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Convert intel_pipe_will_have_type() to using atomic state
Ander Conselvan de Oliveira [Fri, 20 Mar 2015 14:18:17 +0000 (16:18 +0200)]
drm/i915: Convert intel_pipe_will_have_type() to using atomic state

Pass a crtc_state to it and find whether the pipe has an encoder of a
given type by looking at the drm_atomic_state the crtc_state points to.

Until recently i9xx_get_refclk() used to be called indirectly from
vlv_force_pll_on() with a dummy crtc_state. That dummy crtc state is not
converted to be part of a full drm atomic state, so add a WARN in case
someone decides to call that again with a such dummy state. This was
removed in

commit 9cbe40c15a753e02f5da16f6de901decf3276cf1
Author: Vijay Purushothaman <vijay.a.purushothaman@linux.intel.com>
Date:   Thu Mar 5 19:33:08 2015 +0530

    drm/i915: Update prop, int co-eff and gain threshold for CHV

v2: Warn if there is no connectors for a given crtc. (Daniel)
    Replace comment i9xx_get_refclk() with a WARN_ON(). (Ander)

Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
[danvet: Add commit reference for when i9xx_get_refclk was removed.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Pass an atomic state to modeset_global_resources() functions
Ander Conselvan de Oliveira [Fri, 20 Mar 2015 14:18:15 +0000 (16:18 +0200)]
drm/i915: Pass an atomic state to modeset_global_resources() functions

Follow up patches will convert some functions called from there to use
the atomic state, instead of directly accessing the new or current
config. This patch just changes the parameters, but shouldn't have any
functional changes.

Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Add dynamic page trace events
Michel Thierry [Tue, 24 Mar 2015 15:46:23 +0000 (15:46 +0000)]
drm/i915: Add dynamic page trace events

Traces for page directories and tables allocation and map.

v2: Removed references to teardown.
v3: bitmap_scnprintf has been deprecated.
v4: Replace bitmap_scnprintf with scnprintf correctly, and get right
range lengths. (Mika)

Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Signed-off-by: Michel Thierry <michel.thierry@intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Finish gen6/7 dynamic page table allocation
Michel Thierry [Tue, 24 Mar 2015 15:46:22 +0000 (15:46 +0000)]
drm/i915: Finish gen6/7 dynamic page table allocation

This patch continues on the idea from "Track GEN6 page table usage".
From here on, in the steady state, PDEs are all pointing to the scratch
page table (as recommended in the spec). When an object is allocated in
the VA range, the code will determine if we need to allocate a page for
the page table. Similarly when the object is destroyed, we will remove,
and free the page table pointing the PDE back to the scratch page.

Following patches will work to unify the code a bit as we bring in GEN8
support. GEN6 and GEN8 are different enough that I had a hard time to
get to this point with as much common code as I do.

The aliasing PPGTT must pre-allocate all of the page tables. There are a
few reasons for this. Two trivial ones: aliasing ppgtt goes through the
ggtt paths, so it's hard to maintain, we currently do not restore the
default context (assuming the previous force reload is indeed
necessary). Most importantly though, the only way (it seems from
empirical evidence) to invalidate the CS TLBs on non-render ring is to
either use ring sync (which requires actually stopping the rings in
order to synchronize when the sync completes vs. where you are in
execution), or to reload DCLV.  Since without full PPGTT we do not ever
reload the DCLV register, there is no good way to achieve this. The
simplest solution is just to not support dynamic page table
creation/destruction in the aliasing PPGTT.

We could always reload DCLV, but this seems like quite a bit of excess
overhead only to save at most 2MB-4k of memory for the aliasing PPGTT
page tables.

v2: Make the page table bitmap declared inside the function (Chris)
Simplify the way scratching address space works.
Move the alloc/teardown tracepoints up a level in the call stack so that
both all implementations get the trace.

v3: Updated trace event to spit out a name

v4: Aliasing ppgtt is now initialized differently (in setup global gtt)

v5: Rebase to latest code. Also removed unnecessary aliasing ppgtt check
for trace, as it is no longer possible after the PPGTT cleanup patch series
of a couple of months ago (Daniel).

v6: Implement changes from code review (Daniel):
 - allocate/teardown_va_range calls added.
 - Add a scratch page allocation helper (only need the address).
 - Move trace events to a new patch.
 - Use updated mark_tlbs_dirty.
 - Moved pt preallocation for aliasing ppgtt into gen6_ppgtt_init.

v7: teardown_va_range removed (Daniel).
    In init, gen6_ppgtt_clear_range call is only needed for aliasing ppgtt.

v8: Rebase after s/page_tables/page_table/.

v9: Remove unnecessary scratch flag in page_table struct, future patches
can just compare against ppgtt->scratch_pt, and alloc_pt_scratch becomes
redundant. Initialize scratch_pt and pt. (Mika)

v10: Clean up aliasing ppgtt init error path and prevent leaking the
ppgtt obj when init fails. (Mika)
Updated commit author. (Daniel)

Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Michel Thierry <michel.thierry@intel.com> (v4+)
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Remove unnecessary gen6_ppgtt_unmap_pages
Michel Thierry [Tue, 24 Mar 2015 15:46:21 +0000 (15:46 +0000)]
drm/i915: Remove unnecessary gen6_ppgtt_unmap_pages

We are already unmapping them in gen6_ppgtt_free. This function became
redundant since commit 06fda602dbca9c59d87db7da71192e4b54c9f5ff
("drm/i915: Create page table allocators").

Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Michel Thierry <michel.thierry@intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Fix i915_dma_map_single positive error code
Michel Thierry [Tue, 24 Mar 2015 17:06:33 +0000 (17:06 +0000)]
drm/i915: Fix i915_dma_map_single positive error code

i915_dma_map_single relies on dma_mapping_error, which returns positive
error codes. Found by static checker.

Introduced by commit 678d96fbb3b5995a2fdff2bca5e1ab4a40b7e968
("drm/i915: Track GEN6 page table usage").

v2: Return negative error code and renamed commit title. (Dan)
v3: Missing reported-by tag (Daniel)

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Michel Thierry <michel.thierry@intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Prevent out of range pt in gen6_for_each_pde
Michel Thierry [Tue, 24 Mar 2015 15:46:19 +0000 (15:46 +0000)]
drm/i915: Prevent out of range pt in gen6_for_each_pde

Found by static analysis tool, this was harmless as the pt was not
used out of scope though.

Introduced by commit 678d96fbb3b5995a2fdff2bca5e1ab4a40b7e968
("drm/i915: Track GEN6 page table usage").

Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Michel Thierry <michel.thierry@intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: fix definition of the DRM_IOCTL_I915_GET_SPRITE_COLORKEY ioctl
Tommi Rantala [Thu, 26 Mar 2015 19:47:16 +0000 (21:47 +0200)]
drm/i915: fix definition of the DRM_IOCTL_I915_GET_SPRITE_COLORKEY ioctl

Fix definition of the DRM_IOCTL_I915_GET_SPRITE_COLORKEY ioctl, so that it
is different from the DRM_IOCTL_I915_SET_SPRITE_COLORKEY ioctl.

Note that this is just for accuracy, the ioctl implementation itself is totally
unused and already ripped out.

Signed-off-by: Tommi Rantala <tt.rantala@gmail.com>
[danvet: Add note that this is a dead ioctl.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Rip out GET_SPRITE_COLORKEY ioctl
Daniel Vetter [Fri, 27 Mar 2015 08:08:04 +0000 (09:08 +0100)]
drm/i915: Rip out GET_SPRITE_COLORKEY ioctl

It's completely unused and Tommi noticed that the #define is borked
since forever. I've done a git search in userspace and only found
broken definitions and no users anywhere.

Cc: Tommi Rantala <tt.rantala@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agowatchdog: imgpdc: Fix default heartbeat
James Hogan [Fri, 20 Feb 2015 23:45:45 +0000 (23:45 +0000)]
watchdog: imgpdc: Fix default heartbeat

The IMG PDC watchdog driver heartbeat module parameter has no default so
it is initialised to zero. This results in the following warning during
probe:

imgpdc-wdt 2006000.wdt: Initial timeout out of range! setting max timeout

The module parameter description implies that the default value should
be PDC_WDT_DEF_TIMEOUT, which isn't yet used, so initialise it to that.

Also tweak the heartbeat module parameter description for consistency.

Fixes: 93937669e9b5 ("watchdog: ImgTec PDC Watchdog Timer Driver")
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Ezequiel Garcia <ezequiel.garcia@imgtec.com>
Cc: Naidu Tellapati <Naidu.Tellapati@imgtec.com>
Cc: Jude Abraham <Jude.Abraham@imgtec.com>
Cc: linux-watchdog@vger.kernel.org
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
9 years agowatchdog: imgpdc: Fix probe NULL pointer dereference
James Hogan [Fri, 20 Feb 2015 23:45:44 +0000 (23:45 +0000)]
watchdog: imgpdc: Fix probe NULL pointer dereference

The IMG PDC watchdog probe function calls pdc_wdt_stop() prior to
watchdog_set_drvdata(), causing a NULL pointer dereference when
pdc_wdt_stop() retrieves the struct pdc_wdt_dev pointer using
watchdog_get_drvdata() and reads the register base address through it.

Fix by moving the watchdog_set_drvdata() call earlier, to where various
other pdc_wdt->wdt_dev fields are initialised.

Fixes: 93937669e9b5 ("watchdog: ImgTec PDC Watchdog Timer Driver")
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Ezequiel Garcia <ezequiel.garcia@imgtec.com>
Cc: Naidu Tellapati <Naidu.Tellapati@imgtec.com>
Cc: Jude Abraham <Jude.Abraham@imgtec.com>
Cc: linux-watchdog@vger.kernel.org
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
9 years agowatchdog: mtk_wdt: signedness bug in mtk_wdt_start()
Dan Carpenter [Wed, 11 Feb 2015 10:26:21 +0000 (13:26 +0300)]
watchdog: mtk_wdt: signedness bug in mtk_wdt_start()

"ret" should be signed for the error handling to work correctly.  This
doesn't matter much in real life since mtk_wdt_set_timeout() always
succeeds.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
9 years agoMerge branch 'drm-st-next-2015-03-19' of git://git.linaro.org/people/benjamin.gaignar...
Dave Airlie [Thu, 26 Mar 2015 23:17:20 +0000 (09:17 +1000)]
Merge branch 'drm-st-next-2015-03-19' of git://git.linaro.org/people/benjamin.gaignard/kernel into drm-next

This patch makes STI driver use the atomic helpers.
I have fix the comments done by Daniel on the first version and get
his ack with this second version.
* 'drm-st-next-2015-03-19' of git://git.linaro.org/people/benjamin.gaignard/kernel:
  drm: sti: convert driver to atomic modeset

9 years agoMerge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Linus Torvalds [Thu, 26 Mar 2015 22:04:05 +0000 (15:04 -0700)]
Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux

Pull drm refcounting fixes from Dave Airlie:
 "Here is the complete set of i915 bug/warn/refcounting fixes"

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  drm/i915: Fixup legacy plane->crtc link for initial fb config
  drm/i915: Fix atomic state when reusing the firmware fb
  drm/i915: Keep ring->active_list and ring->requests_list consistent
  drm/i915: Don't try to reference the fb in get_initial_plane_config()
  drm: Fixup racy refcounting in plane_force_disable

9 years agoMerge tag 'dm-4.0-fix-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device...
Linus Torvalds [Thu, 26 Mar 2015 21:53:47 +0000 (14:53 -0700)]
Merge tag 'dm-4.0-fix-2' of git://git./linux/kernel/git/device-mapper/linux-dm

Pull device mapper fix from Mike Snitzer:
 "Fix DM core device cleanup regression -- due to a latent race that was
  exposed by the bdi changes that were introduced during the 4.0 merge"

* tag 'dm-4.0-fix-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
  dm: fix add_disk() NULL pointer due to race with free_dev()

9 years agoMerge tag 'linux-kselftest-4.0-rc6' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Thu, 26 Mar 2015 21:43:42 +0000 (14:43 -0700)]
Merge tag 'linux-kselftest-4.0-rc6' of git://git./linux/kernel/git/shuah/linux-kselftest

Pull kselftest fix from Shuah Khan.

* tag 'linux-kselftest-4.0-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  selftests: Fix build failures when invoked from kselftest target

9 years agoMerge tag 'drm-intel-fixes-2015-03-26' of git://anongit.freedesktop.org/drm-intel...
Dave Airlie [Thu, 26 Mar 2015 21:39:45 +0000 (07:39 +1000)]
Merge tag 'drm-intel-fixes-2015-03-26' of git://anongit.freedesktop.org/drm-intel into drm-fixes

This should cover the final warnings in -rc5 with two more backports
from our development branch (drm-intel-next-queued). They're the ones
from Daniel and Damien, with references to the reports.

This is on top of drm-fixes because of the dependency on the two earlier
fixes not yet in Linus' tree.

There's an additional regression fix from Chris.

* tag 'drm-intel-fixes-2015-03-26' of git://anongit.freedesktop.org/drm-intel:
  drm/i915: Fixup legacy plane->crtc link for initial fb config
  drm/i915: Fix atomic state when reusing the firmware fb
  drm/i915: Keep ring->active_list and ring->requests_list consistent

9 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Linus Torvalds [Thu, 26 Mar 2015 21:11:17 +0000 (14:11 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/s390/linux

Pull s390 fixes from Martin Schwidefsky:
 "A couple of bug fixes for s390.

  The ftrace comile fix is quite large for a -rc6 release, but it would
  be nice to have it in 4.0"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/smp: reenable smt after resume
  s390/mm: limit STACK_RND_MASK for compat tasks
  s390/ftrace: fix compile error if CONFIG_KPROBES is disabled
  s390/cpum_sf: add diagnostic sampling event only if it is authorized

9 years agodrm/i915: Don't use encoder->new_crtc in intel_lvds_compute_config()
Ander Conselvan de Oliveira [Fri, 20 Mar 2015 14:18:14 +0000 (16:18 +0200)]
drm/i915: Don't use encoder->new_crtc in intel_lvds_compute_config()

Move towards atomic by using the legacy modeset's drm_atomic_state
instead.

Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Don't use staged config in intel_dp_mst_compute_config()
Ander Conselvan de Oliveira [Fri, 20 Mar 2015 14:18:13 +0000 (16:18 +0200)]
drm/i915: Don't use staged config in intel_dp_mst_compute_config()

Move towards atomic by using the legacy modeset's drm_atomic_state
instead.

Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Use atomic state in intel_ddi_crtc_get_new_encoder()
Ander Conselvan de Oliveira [Fri, 20 Mar 2015 14:18:12 +0000 (16:18 +0200)]
drm/i915: Use atomic state in intel_ddi_crtc_get_new_encoder()

Instead of using connector->new_encoder, get the same information from
the pipe_config, thus making the function ready for the atomic
conversion.

Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Don't depend on encoder->new_crtc in intel_hdmi_compute_config
Ander Conselvan de Oliveira [Fri, 20 Mar 2015 14:18:11 +0000 (16:18 +0200)]
drm/i915: Don't depend on encoder->new_crtc in intel_hdmi_compute_config

Move towards atomic by using the legacy modeset's drm_atomic_state
instead.

Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Don't depend on encoder->new_crtc in intel_dp_compute_config()
Ander Conselvan de Oliveira [Fri, 20 Mar 2015 14:18:10 +0000 (16:18 +0200)]
drm/i915: Don't depend on encoder->new_crtc in intel_dp_compute_config()

Move towards atomic by using the legacy modeset's drm_atomic_state
instead.

Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Don't use encoder->new_crtc in compute_baseline_pipe_bpp()
Ander Conselvan de Oliveira [Fri, 20 Mar 2015 14:18:09 +0000 (16:18 +0200)]
drm/i915: Don't use encoder->new_crtc in compute_baseline_pipe_bpp()

Move towards atomic by using the legacy modeset's drm_atomic_state
instead.

Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
[danvet: Keep the if (!connector) continue; separate so that it's
easier to eventually extract a for_each_connector_in_state iterator.
And because of the upcast it's also safer.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Don't use encoder->new_crtc in intel_modeset_pipe_config()
Ander Conselvan de Oliveira [Fri, 20 Mar 2015 14:18:08 +0000 (16:18 +0200)]
drm/i915: Don't use encoder->new_crtc in intel_modeset_pipe_config()

Move towards atomic by using the legacy modeset's drm_atomic_state
instead.

v2: Move call to drm_atomic_add_affected_connectors() to
    intel_modeset_compute_config(). (Daniel)

Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
[danvet: Resurrect the ret local variable which I've dropped from an
earlier patch and which is now needed.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Copy the staged connector config to the legacy atomic state
Ander Conselvan de Oliveira [Fri, 20 Mar 2015 14:18:07 +0000 (16:18 +0200)]
drm/i915: Copy the staged connector config to the legacy atomic state

With this in place, we can start converting pieces of the modeset code
to look at the connector atomic state instead of the staged config.

v2: Handle the load detect staged config changes too. (Ander)
    Remove unnecessary blank line. (Daniel)

Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Update dummy connector atomic state with current config
Ander Conselvan de Oliveira [Fri, 20 Mar 2015 14:18:05 +0000 (16:18 +0200)]
drm/i915: Update dummy connector atomic state with current config

Keep that state updated so that we can write code that depends on it on
the follow up patches.

v2: Fix BUG due to stale connector_state->crtc value. (Chandra)

v3: Update comment about dummy state connectors. (Chandra)
Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Implement connector state duplication
Ander Conselvan de Oliveira [Fri, 20 Mar 2015 14:18:06 +0000 (16:18 +0200)]
drm/i915: Implement connector state duplication

So that we can add connector states to the drm_atomic_state used in the
legacy modeset.

Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915/skl: fix semicolon.cocci warnings
kbuild test robot [Thu, 26 Mar 2015 14:30:21 +0000 (22:30 +0800)]
drm/i915/skl: fix semicolon.cocci warnings

drivers/gpu/drm/i915/intel_pm.c:2913:4-5: Unneeded semicolon

 Removes unneeded semicolon.

Generated by: scripts/coccinelle/misc/semicolon.cocci

CC: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Allocate a crtc_state also when the crtc is being disabled
Ander Conselvan de Oliveira [Fri, 20 Mar 2015 14:18:04 +0000 (16:18 +0200)]
drm/i915: Allocate a crtc_state also when the crtc is being disabled

For consistency, allocate a new crtc_state for a crtc that is being
disabled. Previously only the enabled value of the current state would
change.

v2: Rebase on v5 of previous patch. (Ander)

Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
[danvet: Resolve rebase conflict.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Allocate a drm_atomic_state for the legacy modeset code
Ander Conselvan de Oliveira [Fri, 20 Mar 2015 14:18:03 +0000 (16:18 +0200)]
drm/i915: Allocate a drm_atomic_state for the legacy modeset code

For the atomic conversion, the mode set paths need to be changed to rely
on an atomic state instead of using the staged config. By using an
atomic state for the legacy code, we will be able to convert the code
base in small chunks.

v2: Squash patch that adds stat argument to intel_set_mode(). (Ander)
    Make every caller of intel_set_mode() allocate state. (Daniel)
    Call drm_atomic_state_clear() in set config's error path. (Daniel)

v3: Copy staged config to atomic state in force restore path. (Ander)

v4: Don't update ->new_config for disabled pipes in __intel_set_mode(),
    since it is expected to be NULL in that case. (Ander)

v5: Don't change return type of intel_modeset_pipe_config(). (Chandra)

Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
[danvet: Remove spurious ret local variable due to changes in v5.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Pass acquire ctx also to intel_release_load_detect_pipe()
Ander Conselvan de Oliveira [Fri, 20 Mar 2015 14:18:02 +0000 (16:18 +0200)]
drm/i915: Pass acquire ctx also to intel_release_load_detect_pipe()

For now this is not necessary since intel_set_mode() doesn't acquire any
new locks. However, once that function is converted to atomic, that will
change, since we'll pass an atomic state to it, and that needs to have
the right acquire context set.

Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Add intel_atomic_get_crtc_state() helper function
Ander Conselvan de Oliveira [Fri, 20 Mar 2015 14:18:01 +0000 (16:18 +0200)]
drm/i915: Add intel_atomic_get_crtc_state() helper function

The pattern of getting the crtc state with drm_atomic_get_crtc_state()
and then converting it to intel_crtc_state will repeat quite often in
the following patches, so add a helper function to save some typing.

v2: Fix upcasting so that crtc_state base field could be moved. (Daniel)
Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: always preserve bios swizzling
Daniel Vetter [Thu, 26 Mar 2015 11:42:24 +0000 (12:42 +0100)]
drm/i915: always preserve bios swizzling

Currently we only set preserve_bios_swizzling when the initial fb is
shared and totally miss the single-screen case. Fix this by
consolidating all the logic for both cases.

This seems to go back to when swizzle preservation was originally
merged in

commit d9ceb8163339134bd3ffb9fb87a0db4698283e32
Author: Jesse Barnes <jbarnes@virtuousgeek.org>
Date:   Thu Oct 9 12:57:43 2014 -0700

    drm/i915: preserve swizzle settings if necessary v4

Cc: Kristian Høgsberg <hoegsberg@gmail.com>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm/i915: Add initial_ prefix to bios fb takeover code
Daniel Vetter [Thu, 26 Mar 2015 11:17:05 +0000 (12:17 +0100)]
drm/i915: Add initial_ prefix to bios fb takeover code

In spirit with

commit 5724dbd1678e2f573b13f0688277941fad66cb88
Author: Damien Lespiau <damien.lespiau@intel.com>
Date:   Tue Jan 20 12:51:52 2015 +0000

    drm/i915: Rename plane_config to initial_plane_config

to make it clear that this code is all special-purpose for the initial
plane takeover.

Cc: Damien Lespiau <damien.lespiau@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm/i915: Remove duplicated psr.active unset
Rodrigo Vivi [Wed, 25 Mar 2015 19:18:23 +0000 (12:18 -0700)]
drm/i915: Remove duplicated psr.active unset

psr.active is being unset out of the if so this here is useless and
duplicated.

Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Fixup legacy plane->crtc link for initial fb config
Daniel Vetter [Wed, 25 Mar 2015 17:30:38 +0000 (18:30 +0100)]
drm/i915: Fixup legacy plane->crtc link for initial fb config

This is a very similar bug in the load detect code fixed in

commit 9128b040eb774e04bc23777b005ace2b66ab2a85
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Tue Mar 3 17:31:21 2015 +0100

    drm/i915: Fix modeset state confusion in the load detect code

But this time around it was the initial fb code that forgot to update
the plane->crtc pointer. Otherwise it's the exact same bug, with the
exact same restrains (any set_config call/ioctl that doesn't disable
the pipe papers over the bug for free, so fairly hard to hit in normal
testing). So if you want the full explanation just go read that one
over there - it's rather long ...

Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Josh Boyer <jwboyer@fedoraproject.org>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Reported-and-tested-by: Josh Boyer <jwboyer@fedoraproject.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: kill i915.powersave
Rodrigo Vivi [Tue, 24 Mar 2015 19:40:09 +0000 (12:40 -0700)]
drm/i915: kill i915.powersave

This flag was being mostly used as a meta flag in some
cases and not covering other cases.

One of the risks is that it was masking some frontbuffer
trackings without disabling PSR.

So, better to kill this at once and avoid umbrella parameters.

Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
[danvet: Drop unused out: label to appease gcc.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Fixup legacy plane->crtc link for initial fb config
Daniel Vetter [Wed, 25 Mar 2015 17:30:38 +0000 (18:30 +0100)]
drm/i915: Fixup legacy plane->crtc link for initial fb config

This is a very similar bug in the load detect code fixed in

commit 9128b040eb774e04bc23777b005ace2b66ab2a85
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Tue Mar 3 17:31:21 2015 +0100

    drm/i915: Fix modeset state confusion in the load detect code

But this time around it was the initial fb code that forgot to update
the plane->crtc pointer. Otherwise it's the exact same bug, with the
exact same restrains (any set_config call/ioctl that doesn't disable
the pipe papers over the bug for free, so fairly hard to hit in normal
testing). So if you want the full explanation just go read that one
over there - it's rather long ...

Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Josh Boyer <jwboyer@fedoraproject.org>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Reported-and-tested-by: Josh Boyer <jwboyer@fedoraproject.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
[Jani: backported to drm-intel-fixes for v4.0-rc]
Reference: http://mid.gmane.org/CA+5PVA7ChbtJrknqws1qvZcbrg1CW2pQAFkSMURWWgyASRyGXg@mail.gmail.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
9 years agodrm/i915: Fix atomic state when reusing the firmware fb
Damien Lespiau [Thu, 5 Feb 2015 19:24:25 +0000 (19:24 +0000)]
drm/i915: Fix atomic state when reusing the firmware fb

Right now, we get a warning when taking over the firmware fb:

  [drm:drm_atomic_plane_check] FB set but no CRTC

with the following backtrace:

  [<ffffffffa010339d>] drm_atomic_check_only+0x35d/0x510 [drm]
  [<ffffffffa0103567>] drm_atomic_commit+0x17/0x60 [drm]
  [<ffffffffa00a6ccd>] drm_atomic_helper_plane_set_property+0x8d/0xd0 [drm_kms_helper]
  [<ffffffffa00f1fed>] drm_mode_plane_set_obj_prop+0x2d/0x90 [drm]
  [<ffffffffa00a8a1b>] restore_fbdev_mode+0x6b/0xf0 [drm_kms_helper]
  [<ffffffffa00aa969>] drm_fb_helper_restore_fbdev_mode_unlocked+0x29/0x80 [drm_kms_helper]
  [<ffffffffa00aa9e2>] drm_fb_helper_set_par+0x22/0x50 [drm_kms_helper]
  [<ffffffffa050a71a>] intel_fbdev_set_par+0x1a/0x60 [i915]
  [<ffffffff813ad444>] fbcon_init+0x4f4/0x580

That's because we update the plane state with the fb from the firmware, but we
never associate the plane to that CRTC.

We don't quite have the full DRM take over from HW state just yet, so
fake enough of the plane atomic state to pass the checks.

v2: Fix the state on which we set the CRTC in the case we're sharing the
    initial fb with another pipe. (Matt)

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
[Jani: backported to drm-intel-fixes for v4.0-rc]
Reference: http://mid.gmane.org/CA+5PVA7yXH=U757w8V=Zj2U1URG4nYNav20NpjtQ4svVueyPNw@mail.gmail.com
Reference: http://lkml.kernel.org/r/CA+55aFweWR=nDzc2Y=rCtL_H8JfdprQiCimN5dwc+TgyD4Bjsg@mail.gmail.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
9 years agoALSA: hda - Add one more node in the EAPD supporting candidate list
Hui Wang [Thu, 26 Mar 2015 09:14:55 +0000 (17:14 +0800)]
ALSA: hda - Add one more node in the EAPD supporting candidate list

We have a HP machine which use the codec node 0x17 connecting the
internal speaker, and from the node capability, we saw the EAPD,
if we don't set the EAPD on for this node, the internal speaker
can't output any sound.

Cc: <stable@vger.kernel.org>
BugLink: https://bugs.launchpad.net/bugs/1436745
Signed-off-by: Hui Wang <hui.wang@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
9 years agoclocksource/drivers/sun5i: Fix cpufreq interaction with sched_clock()
Maxime Ripard [Thu, 26 Mar 2015 09:27:09 +0000 (10:27 +0100)]
clocksource/drivers/sun5i: Fix cpufreq interaction with sched_clock()

The sun5i timer is used as the sched-clock on certain systems, and ever
since we started using cpufreq, the cpu clock (that is one of the
timer's clock indirect parent) now changes as well, along with the
actual sched_clock() rate.

This is not accurate and not desirable.

We can safely remove the sun5i sched-clock on those systems, since we
have other reliable sched_clock() sources in the system.

Tested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
[ Improved the changelog. ]
Cc: richard@nod.at
Link: http://lkml.kernel.org/r/1427362029-6511-4-git-send-email-daniel.lezcano@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
9 years agoclocksource/drivers: Fix various !CONFIG_HAS_IOMEM build errors
Richard Weinberger [Thu, 26 Mar 2015 09:27:06 +0000 (10:27 +0100)]
clocksource/drivers: Fix various !CONFIG_HAS_IOMEM build errors

Fix !CONFIG_HAS_IOMEM related build failures in three clocksource drivers.

The build failures have the pattern of:

  drivers/clocksource/sh_cmt.c: In function ‘sh_cmt_map_memory’: drivers/clocksource/sh_cmt.c:920:2:
  error: implicit declaration of function ‘ioremap_nocache’ [-Werror=implicit-function-declaration]   cmt->mapbase = ioremap_nocache(mem->start, resource_size(mem));

Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: maxime.ripard@free-electrons.com
Link: http://lkml.kernel.org/r/1427362029-6511-1-git-send-email-daniel.lezcano@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
9 years agodrm/i915: Keep ring->active_list and ring->requests_list consistent
Chris Wilson [Wed, 18 Mar 2015 18:19:22 +0000 (18:19 +0000)]
drm/i915: Keep ring->active_list and ring->requests_list consistent

If we retire requests last, we may use a later seqno and so clear
the requests lists without clearing the active list, leading to
confusion. Hence we should retire requests first for consistency with
the early return. The order used to be important as the lifecycle for
the object on the active list was determined by request->seqno. However,
the requests themselves are now reference counted removing the
constraint from the order of retirement.

Fixes regression from

commit 1b5a433a4dd967b125131da42b89b5cc0d5b1f57
Author: John Harrison <John.C.Harrison@Intel.com>
Date:   Mon Nov 24 18:49:42 2014 +0000

    drm/i915: Convert 'i915_seqno_passed' calls into 'i915_gem_request_completed
'

and a

WARNING: CPU: 0 PID: 1383 at drivers/gpu/drm/i915/i915_gem_evict.c:279 i915_gem_evict_vm+0x10c/0x140()
WARN_ON(!list_empty(&vm->active_list))

Identified by updating WATCH_LISTS:

[drm:i915_verify_lists] *ERROR* blitter ring: active list not empty, but no requests
WARNING: CPU: 0 PID: 681 at drivers/gpu/drm/i915/i915_gem.c:2751 i915_gem_retire_requests_ring+0x149/0x230()
WARN_ON(i915_verify_lists(ring->dev))

Note that this is only a problem in evict_vm where the following happens
after a retire_request has cleaned out all requests, but not all active
bo:
- intel_ring_idle called from i915_gpu_idle notices that no requests are
  outstanding and immediately returns.
- i915_gem_retire_requests_ring called from i915_gem_retire_requests also
  immediately returns when there's no request, still leaving the bo on the
  active list.
- evict_vm hits the WARN_ON(!list_empty(&vm->active_list)) after evicting
  all active objects that there's still stuff left that shouldn't be
  there.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: John Harrison <John.C.Harrison@Intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
9 years agoALSA: hda_intel: apply the Seperate stream_tag for Sunrise Point
Libin Yang [Thu, 26 Mar 2015 05:28:39 +0000 (13:28 +0800)]
ALSA: hda_intel: apply the Seperate stream_tag for Sunrise Point

The total stream number of Sunrise Point's input and output stream
exceeds 15, which will cause some streams do not work because
of the overflow on SDxCTL.STRM field if using the legacy
stream tag allocation method.

This patch uses the new stream tag allocation method by add
the flag AZX_DCAPS_SEPARATE_STREAM_TAG for Skylake platform.

Signed-off-by: Libin Yang <libin.yang@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
9 years agoARC: signal handling robustify
Vineet Gupta [Thu, 26 Mar 2015 05:44:41 +0000 (11:14 +0530)]
ARC: signal handling robustify

A malicious signal handler / restorer can DOS the system by fudging the
user regs saved on stack, causing weird things such as sigreturn returning
to user mode PC but cpu state still being kernel mode....

Ensure that in sigreturn path status32 always has U bit; any other bogosity
(gargbage PC etc) will be taken care of by normal user mode exceptions mechanisms.

Reproducer signal handler:

    void handle_sig(int signo, siginfo_t *info, void *context)
    {
ucontext_t *uc = context;
struct user_regs_struct *regs = &(uc->uc_mcontext.regs);

regs->scratch.status32 = 0;
    }

Before the fix, kernel would go off to weeds like below:

    --------->8-----------
    [ARCLinux]$ ./signal-test
    Path: /signal-test
    CPU: 0 PID: 61 Comm: signal-test Not tainted 4.0.0-rc5+ #65
    task: 8f177880 ti: 5ffe6000 task.ti: 8f15c000

    [ECR   ]: 0x00220200 => Invalid Write @ 0x00000010 by insn @ 0x00010698
    [EFA   ]: 0x00000010
    [BLINK ]: 0x2007c1ee
    [ERET  ]: 0x10698
    [STAT32]: 0x00000000 :                                   <--------
    BTA: 0x00010680  SP: 0x5ffe7e48  FP: 0x00000000
    LPS: 0x20003c6c LPE: 0x20003c70 LPC: 0x00000000
    ...
    --------->8-----------

Reported-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
9 years agoARC: SA_SIGINFO ucontext regs off-by-one
Vineet Gupta [Thu, 26 Mar 2015 03:55:44 +0000 (09:25 +0530)]
ARC: SA_SIGINFO ucontext regs off-by-one

The regfile provided to SA_SIGINFO signal handler as ucontext was off by
one due to pt_regs gutter cleanups in 2013.

Before handling signal, user pt_regs are copied onto user_regs_struct and copied
back later. Both structs are binary compatible. This was all fine until
commit 2fa919045b72 (ARC: pt_regs update #2) which removed the empty stack slot
at top of pt_regs (corresponding to first pad) and made the corresponding
fixup in struct user_regs_struct (the pad in there was moved out of
@scratch - not removed altogether as it is part of ptrace ABI)

 struct user_regs_struct {
+       long pad;
        struct {
-               long pad;
                long bta, lp_start, lp_end,....
        } scratch;
 ...
 }

This meant that now user_regs_struct was off by 1 reg w.r.t pt_regs and
signal code needs to user_regs_struct.scratch to reflect it as pt_regs,
which is what this commit does.

This problem was hidden for 2 years, because both save/restore, despite
using wrong location, were using the same location. Only an interim
inspection (reproducer below) exposed the issue.

     void handle_segv(int signo, siginfo_t *info, void *context)
     {
  ucontext_t *uc = context;
struct user_regs_struct *regs = &(uc->uc_mcontext.regs);

printf("regs %x %x\n",               <=== prints 7 8 (vs. 8 9)
               regs->scratch.r8, regs->scratch.r9);
     }

     int main()
     {
struct sigaction sa;

sa.sa_sigaction = handle_segv;
sa.sa_flags = SA_SIGINFO;
sigemptyset(&sa.sa_mask);
sigaction(SIGSEGV, &sa, NULL);

asm volatile(
"mov r7, 7 \n"
"mov r8, 8 \n"
"mov r9, 9 \n"
"mov r10, 10 \n"
:::"r7","r8","r9","r10");

*((unsigned int*)0x10) = 0;
     }

Fixes: 2fa919045b72ec892e "ARC: pt_regs update #2: Remove unused gutter at start of pt_regs"
CC: <stable@vger.kernel.org>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
9 years agoMerge tag 'metag-fixes-v4.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/jhoga...
Linus Torvalds [Wed, 25 Mar 2015 23:52:53 +0000 (16:52 -0700)]
Merge tag 'metag-fixes-v4.0-2' of git://git./linux/kernel/git/jhogan/metag

Pull arch/metag fix from James Hogan:
 "Another metag architecture fix for v4.0

  This is another single fix, for an include dependency problem when
  using ioremap_wc() from asm/io.h without also including asm/pgtable.h"

* tag 'metag-fixes-v4.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/metag:
  metag: Fix ioremap_wc/ioremap_cached build errors

9 years agoMerge branch 'akpm' (patches from Andrew)
Linus Torvalds [Wed, 25 Mar 2015 23:21:17 +0000 (16:21 -0700)]
Merge branch 'akpm' (patches from Andrew)

Merge misc fixes from Andrew Morton:
 "15 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  mm: numa: mark huge PTEs young when clearing NUMA hinting faults
  mm: numa: slow PTE scan rate if migration failures occur
  mm: numa: preserve PTE write permissions across a NUMA hinting fault
  mm: numa: group related processes based on VMA flags instead of page table flags
  hfsplus: fix B-tree corruption after insertion at position 0
  MAINTAINERS: add Jan as DMI/SMBIOS support maintainer
  fs/affs/file.c: unlock/release page on error
  mm/page_alloc.c: call kernel_map_pages in unset_migrateype_isolate
  mm/slub: fix lockups on PREEMPT && !SMP kernels
  mm/memory hotplug: postpone the reset of obsolete pgdat
  MAINTAINERS: correct rtc armada38x pattern entry
  mm/pagewalk.c: prevent positive return value of walk_page_test() from being passed to callers
  mm: fix anon_vma->degree underflow in anon_vma endless growing prevention
  drivers/rtc/rtc-mrst: fix suspend/resume
  aoe: update aoe maintainer information

9 years agoMerge tag 'signed-for-4.0' of git://github.com/agraf/linux-2.6
Marcelo Tosatti [Wed, 25 Mar 2015 23:20:31 +0000 (20:20 -0300)]
Merge tag 'signed-for-4.0' of git://github.com/agraf/linux-2.6

Patch queue for 4.0 - 2015-03-25

A few bug fixes for Book3S HV KVM:

  - Fix spinlock ordering
  - Fix idle guests on LE hosts
  - Fix instruction emulation

9 years agomm: numa: mark huge PTEs young when clearing NUMA hinting faults
Mel Gorman [Wed, 25 Mar 2015 22:55:45 +0000 (15:55 -0700)]
mm: numa: mark huge PTEs young when clearing NUMA hinting faults

Base PTEs are marked young when the NUMA hinting information is cleared
but the same does not happen for huge pages which this patch addresses.

Note that migrated pages are not marked young as the base page migration
code does not assume that migrated pages have been referenced.  This
could be addressed but beyond the scope of this series which is aimed at
Dave Chinners shrink workload that is unlikely to be affected by this
issue.

Signed-off-by: Mel Gorman <mgorman@suse.de>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Aneesh Kumar <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agomm: numa: slow PTE scan rate if migration failures occur
Mel Gorman [Wed, 25 Mar 2015 22:55:42 +0000 (15:55 -0700)]
mm: numa: slow PTE scan rate if migration failures occur

Dave Chinner reported the following on https://lkml.org/lkml/2015/3/1/226

  Across the board the 4.0-rc1 numbers are much slower, and the degradation
  is far worse when using the large memory footprint configs. Perf points
  straight at the cause - this is from 4.0-rc1 on the "-o bhash=101073" config:

   -   56.07%    56.07%  [kernel]            [k] default_send_IPI_mask_sequence_phys
      - default_send_IPI_mask_sequence_phys
         - 99.99% physflat_send_IPI_mask
            - 99.37% native_send_call_func_ipi
                 smp_call_function_many
               - native_flush_tlb_others
                  - 99.85% flush_tlb_page
                       ptep_clear_flush
                       try_to_unmap_one
                       rmap_walk
                       try_to_unmap
                       migrate_pages
                       migrate_misplaced_page
                     - handle_mm_fault
                        - 99.73% __do_page_fault
                             trace_do_page_fault
                             do_async_page_fault
                           + async_page_fault
              0.63% native_send_call_func_single_ipi
                 generic_exec_single
                 smp_call_function_single

This is showing excessive migration activity even though excessive
migrations are meant to get throttled.  Normally, the scan rate is tuned
on a per-task basis depending on the locality of faults.  However, if
migrations fail for any reason then the PTE scanner may scan faster if
the faults continue to be remote.  This means there is higher system CPU
overhead and fault trapping at exactly the time we know that migrations
cannot happen.  This patch tracks when migration failures occur and
slows the PTE scanner.

Signed-off-by: Mel Gorman <mgorman@suse.de>
Reported-by: Dave Chinner <david@fromorbit.com>
Tested-by: Dave Chinner <david@fromorbit.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Aneesh Kumar <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agomm: numa: preserve PTE write permissions across a NUMA hinting fault
Mel Gorman [Wed, 25 Mar 2015 22:55:40 +0000 (15:55 -0700)]
mm: numa: preserve PTE write permissions across a NUMA hinting fault

Protecting a PTE to trap a NUMA hinting fault clears the writable bit
and further faults are needed after trapping a NUMA hinting fault to set
the writable bit again.  This patch preserves the writable bit when
trapping NUMA hinting faults.  The impact is obvious from the number of
minor faults trapped during the basis balancing benchmark and the system
CPU usage;

  autonumabench
                                             4.0.0-rc4             4.0.0-rc4
                                              baseline              preserve
  Time System-NUMA01                  107.13 (  0.00%)      103.13 (  3.73%)
  Time System-NUMA01_THEADLOCAL       131.87 (  0.00%)       83.30 ( 36.83%)
  Time System-NUMA02                    8.95 (  0.00%)       10.72 (-19.78%)
  Time System-NUMA02_SMT                4.57 (  0.00%)        3.99 ( 12.69%)
  Time Elapsed-NUMA01                 515.78 (  0.00%)      517.26 ( -0.29%)
  Time Elapsed-NUMA01_THEADLOCAL      384.10 (  0.00%)      384.31 ( -0.05%)
  Time Elapsed-NUMA02                  48.86 (  0.00%)       48.78 (  0.16%)
  Time Elapsed-NUMA02_SMT              47.98 (  0.00%)       48.12 ( -0.29%)

               4.0.0-rc4   4.0.0-rc4
                baseline    preserve
  User          44383.95    43971.89
  System          252.61      201.24
  Elapsed         998.68     1000.94

  Minor Faults   2597249     1981230
  Major Faults       365         364

There is a similar drop in system CPU usage using Dave Chinner's xfsrepair
workload

                                      4.0.0-rc4             4.0.0-rc4
                                       baseline              preserve
  Amean    real-xfsrepair      454.14 (  0.00%)      442.36 (  2.60%)
  Amean    syst-xfsrepair      277.20 (  0.00%)      204.68 ( 26.16%)

The patch looks hacky but the alternatives looked worse.  The tidest was
to rewalk the page tables after a hinting fault but it was more complex
than this approach and the performance was worse.  It's not generally
safe to just mark the page writable during the fault if it's a write
fault as it may have been read-only for COW so that approach was
discarded.

Signed-off-by: Mel Gorman <mgorman@suse.de>
Reported-by: Dave Chinner <david@fromorbit.com>
Tested-by: Dave Chinner <david@fromorbit.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Aneesh Kumar <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agomm: numa: group related processes based on VMA flags instead of page table flags
Mel Gorman [Wed, 25 Mar 2015 22:55:37 +0000 (15:55 -0700)]
mm: numa: group related processes based on VMA flags instead of page table flags

These are three follow-on patches based on the xfsrepair workload Dave
Chinner reported was problematic in 4.0-rc1 due to changes in page table
management -- https://lkml.org/lkml/2015/3/1/226.

Much of the problem was reduced by commit 53da3bc2ba9e ("mm: fix up numa
read-only thread grouping logic") and commit ba68bc0115eb ("mm: thp:
Return the correct value for change_huge_pmd").  It was known that the
performance in 3.19 was still better even if is far less safe.  This
series aims to restore the performance without compromising on safety.

For the test of this mail, I'm comparing 3.19 against 4.0-rc4 and the
three patches applied on top

  autonumabench
                                                3.19.0             4.0.0-rc4             4.0.0-rc4             4.0.0-rc4             4.0.0-rc4
                                               vanilla               vanilla          vmwrite-v5r8         preserve-v5r8         slowscan-v5r8
  Time System-NUMA01                  124.00 (  0.00%)      161.86 (-30.53%)      107.13 ( 13.60%)      103.13 ( 16.83%)      145.01 (-16.94%)
  Time System-NUMA01_THEADLOCAL       115.54 (  0.00%)      107.64 (  6.84%)      131.87 (-14.13%)       83.30 ( 27.90%)       92.35 ( 20.07%)
  Time System-NUMA02                    9.35 (  0.00%)       10.44 (-11.66%)        8.95 (  4.28%)       10.72 (-14.65%)        8.16 ( 12.73%)
  Time System-NUMA02_SMT                3.87 (  0.00%)        4.63 (-19.64%)        4.57 (-18.09%)        3.99 ( -3.10%)        3.36 ( 13.18%)
  Time Elapsed-NUMA01                 570.06 (  0.00%)      567.82 (  0.39%)      515.78 (  9.52%)      517.26 (  9.26%)      543.80 (  4.61%)
  Time Elapsed-NUMA01_THEADLOCAL      393.69 (  0.00%)      384.83 (  2.25%)      384.10 (  2.44%)      384.31 (  2.38%)      380.73 (  3.29%)
  Time Elapsed-NUMA02                  49.09 (  0.00%)       49.33 ( -0.49%)       48.86 (  0.47%)       48.78 (  0.63%)       50.94 ( -3.77%)
  Time Elapsed-NUMA02_SMT              47.51 (  0.00%)       47.15 (  0.76%)       47.98 ( -0.99%)       48.12 ( -1.28%)       49.56 ( -4.31%)

                3.19.0   4.0.0-rc4   4.0.0-rc4   4.0.0-rc4   4.0.0-rc4
               vanilla     vanillavmwrite-v5r8preserve-v5r8slowscan-v5r8
  User        46334.60    46391.94    44383.95    43971.89    44372.12
  System        252.84      284.66      252.61      201.24      249.00
  Elapsed      1062.14     1050.96      998.68     1000.94     1026.78

Overall the system CPU usage is comparable and the test is naturally a
bit variable.  The slowing of the scanner hurts numa01 but on this
machine it is an adverse workload and patches that dramatically help it
often hurt absolutely everything else.

Due to patch 2, the fault activity is interesting

                                  3.19.0   4.0.0-rc4   4.0.0-rc4   4.0.0-rc4   4.0.0-rc4
                                 vanilla     vanillavmwrite-v5r8preserve-v5r8slowscan-v5r8
  Minor Faults                   2097811     2656646     2597249     1981230     1636841
  Major Faults                       362         450         365         364         365

Note the impact preserving the write bit across protection updates and
fault reduces faults.

  NUMA alloc hit                 1229008     1217015     1191660     1178322     1199681
  NUMA alloc miss                      0           0           0           0           0
  NUMA interleave hit                  0           0           0           0           0
  NUMA alloc local               1228514     1216317     1190871     1177448     1199021
  NUMA base PTE updates        245706197   240041607   238195516   244704842   115012800
  NUMA huge PMD updates           479530      468448      464868      477573      224487
  NUMA page range updates      491225557   479886983   476207932   489222218   229950144
  NUMA hint faults                659753      656503      641678      656926      294842
  NUMA hint local faults          381604      373963      360478      337585      186249
  NUMA hint local percent             57          56          56          51          63
  NUMA pages migrated            5412140     6374899     6266530     5277468     5755096
  AutoNUMA cost                    5121%       5083%       4994%       5097%       2388%

Here the impact of slowing the PTE scanner on migratrion failures is
obvious as "NUMA base PTE updates" and "NUMA huge PMD updates" are
massively reduced even though the headline performance is very similar.

As xfsrepair was the reported workload here is the impact of the series
on it.

  xfsrepair
                                         3.19.0             4.0.0-rc4             4.0.0-rc4             4.0.0-rc4             4.0.0-rc4
                                        vanilla               vanilla          vmwrite-v5r8         preserve-v5r8         slowscan-v5r8
  Min      real-fsmark        1183.29 (  0.00%)     1165.73 (  1.48%)     1152.78 (  2.58%)     1153.64 (  2.51%)     1177.62 (  0.48%)
  Min      syst-fsmark        4107.85 (  0.00%)     4027.75 (  1.95%)     3986.74 (  2.95%)     3979.16 (  3.13%)     4048.76 (  1.44%)
  Min      real-xfsrepair      441.51 (  0.00%)      463.96 ( -5.08%)      449.50 ( -1.81%)      440.08 (  0.32%)      439.87 (  0.37%)
  Min      syst-xfsrepair      195.76 (  0.00%)      278.47 (-42.25%)      262.34 (-34.01%)      203.70 ( -4.06%)      143.64 ( 26.62%)
  Amean    real-fsmark        1188.30 (  0.00%)     1177.34 (  0.92%)     1157.97 (  2.55%)     1158.21 (  2.53%)     1182.22 (  0.51%)
  Amean    syst-fsmark        4111.37 (  0.00%)     4055.70 (  1.35%)     3987.19 (  3.02%)     3998.72 (  2.74%)     4061.69 (  1.21%)
  Amean    real-xfsrepair      450.88 (  0.00%)      468.32 ( -3.87%)      454.14 ( -0.72%)      442.36 (  1.89%)      440.59 (  2.28%)
  Amean    syst-xfsrepair      199.66 (  0.00%)      290.60 (-45.55%)      277.20 (-38.84%)      204.68 ( -2.51%)      150.55 ( 24.60%)
  Stddev   real-fsmark           4.12 (  0.00%)       10.82 (-162.29%)       4.14 ( -0.28%)        5.98 (-45.05%)        4.60 (-11.53%)
  Stddev   syst-fsmark           2.63 (  0.00%)       20.32 (-671.82%)       0.37 ( 85.89%)       16.47 (-525.59%)      15.05 (-471.79%)
  Stddev   real-xfsrepair        6.87 (  0.00%)        4.55 ( 33.75%)        3.46 ( 49.58%)        1.78 ( 74.12%)        0.52 ( 92.50%)
  Stddev   syst-xfsrepair        3.02 (  0.00%)       10.30 (-241.37%)      13.17 (-336.37%)       0.71 ( 76.63%)        5.00 (-65.61%)
  CoeffVar real-fsmark           0.35 (  0.00%)        0.92 (-164.73%)       0.36 ( -2.91%)        0.52 (-48.82%)        0.39 (-12.10%)
  CoeffVar syst-fsmark           0.06 (  0.00%)        0.50 (-682.41%)       0.01 ( 85.45%)        0.41 (-543.22%)       0.37 (-478.78%)
  CoeffVar real-xfsrepair        1.52 (  0.00%)        0.97 ( 36.21%)        0.76 ( 49.94%)        0.40 ( 73.62%)        0.12 ( 92.33%)
  CoeffVar syst-xfsrepair        1.51 (  0.00%)        3.54 (-134.54%)       4.75 (-214.31%)       0.34 ( 77.20%)        3.32 (-119.63%)
  Max      real-fsmark        1193.39 (  0.00%)     1191.77 (  0.14%)     1162.90 (  2.55%)     1166.66 (  2.24%)     1188.50 (  0.41%)
  Max      syst-fsmark        4114.18 (  0.00%)     4075.45 (  0.94%)     3987.65 (  3.08%)     4019.45 (  2.30%)     4082.80 (  0.76%)
  Max      real-xfsrepair      457.80 (  0.00%)      474.60 ( -3.67%)      457.82 ( -0.00%)      444.42 (  2.92%)      441.03 (  3.66%)
  Max      syst-xfsrepair      203.11 (  0.00%)      303.65 (-49.50%)      294.35 (-44.92%)      205.33 ( -1.09%)      155.28 ( 23.55%)

The really relevant lines as syst-xfsrepair which is the system CPU
usage when running xfsrepair.  Note that on my machine the overhead was
45% higher on 4.0-rc4 which may be part of what Dave is seeing.  Once we
preserve the write bit across faults, it's only 2.51% higher on average.
With the full series applied, system CPU usage is 24.6% lower on
average.

Again, the impact of preserving the write bit on minor faults is obvious
and the impact of slowing scanning after migration failures is obvious
on the PTE updates.  Note also that the number of pages migrated is much
reduced even though the headline performance is comparable.

                                  3.19.0   4.0.0-rc4   4.0.0-rc4   4.0.0-rc4   4.0.0-rc4
                                 vanilla     vanillavmwrite-v5r8preserve-v5r8slowscan-v5r8
  Minor Faults                 153466827   254507978   249163829   153501373   105737890
  Major Faults                       610         702         690         649         724
  NUMA base PTE updates        217735049   210756527   217729596   216937111   144344993
  NUMA huge PMD updates           129294       85044      106921      127246       79887
  NUMA pages migrated           21938995    29705270    28594162    22687324    16258075

                        3.19.0   4.0.0-rc4   4.0.0-rc4   4.0.0-rc4   4.0.0-rc4
                       vanilla     vanillavmwrite-v5r8preserve-v5r8slowscan-v5r8
  Mean sdb-avgqusz       13.47        2.54        2.55        2.47        2.49
  Mean sdb-avgrqsz      202.32      140.22      139.50      139.02      138.12
  Mean sdb-await         25.92        5.09        5.33        5.02        5.22
  Mean sdb-r_await        4.71        0.19        0.83        0.51        0.11
  Mean sdb-w_await      104.13        5.21        5.38        5.05        5.32
  Mean sdb-svctm          0.59        0.13        0.14        0.13        0.14
  Mean sdb-rrqm           0.16        0.00        0.00        0.00        0.00
  Mean sdb-wrqm           3.59     1799.43     1826.84     1812.21     1785.67
  Max  sdb-avgqusz      111.06       12.13       14.05       11.66       15.60
  Max  sdb-avgrqsz      255.60      190.34      190.01      187.33      191.78
  Max  sdb-await        168.24       39.28       49.22       44.64       65.62
  Max  sdb-r_await      660.00       52.00      280.00       76.00       12.00
  Max  sdb-w_await     7804.00       39.28       49.22       44.64       65.62
  Max  sdb-svctm          4.00        2.82        2.86        1.98        2.84
  Max  sdb-rrqm           8.30        0.00        0.00        0.00        0.00
  Max  sdb-wrqm          34.20     5372.80     5278.60     5386.60     5546.15

FWIW, I also checked SPECjbb in different configurations but it's
similar observations -- minor faults lower, PTE update activity lower
and performance is roughly comparable against 3.19.

This patch (of 3):

Threads that share writable data within pages are grouped together as
related tasks.  This decision is based on whether the PTE is marked
dirty which is subject to timing races between the PTE scanner update
and when the application writes the page.  If the page is file-backed,
then background flushes and sync also affect placement.  This is
unpredictable behaviour which is impossible to reason about so this
patch makes grouping decisions based on the VMA flags.

Signed-off-by: Mel Gorman <mgorman@suse.de>
Reported-by: Dave Chinner <david@fromorbit.com>
Tested-by: Dave Chinner <david@fromorbit.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Aneesh Kumar <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>