Commit Graph

560770 Commits

Author SHA1 Message Date
Linus Torvalds 116dfe5e88 A single fix from Mauro for a 4.4 regression that would cause the docs
build to fail on systems with ancient Perl installations.
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Merge tag '4.4-fix' of git://git.lwn.net/linux

Pull documentation fix from Jon Corbet:
 "A single fix from Mauro for a 4.4 regression that would cause the docs
  build to fail on systems with ancient Perl installations"

* tag '4.4-fix' of git://git.lwn.net/linux:
  kernel-doc: Make it compatible with Perl versions below 5.12 again
2015-11-20 15:47:27 -08:00
Linus Torvalds 95803066c6 Merge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull libnvdimm fixes from Dan Williams:

 - A collection of crash and deadlock fixes for DAX that are also tagged
   for -stable.  We will look to re-enable DAX pmd mappings in 4.5, but
   for now 4.4 and -stable should disable it by default.

 - A fixup to ext2 and ext4 to mirror the same warning emitted by XFS
   when mounting with "-o dax"

* 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  block: protect rw_page against device teardown
  mm, dax: fix DAX deadlocks (COW fault)
  dax: disable pmd mappings
  ext2, ext4: warn when mounting with dax enabled
2015-11-20 15:00:50 -08:00
Linus Torvalds 400f3f255d More power management and ACPI updates for v4.4-rc2
- Revert three recent intel_pstate driver commits one of which
    introduced a regression and the remaining two depend on the
    problematic one (Rafael Wysocki).
 
  - Fix breakage related to the recently introduced ACPI _CCA object
    support in the PCI DMA setup code (Suravee Suthikulpanit).
 
  - Fix up the recently introduced ACPI CPPC support to only
    use the hardware-reduced version of the PCCT structure as
    the only architecture to support it (ARM64) will only use
    hardware-reduced ACPI anyway (Ashwin Chaugule).
 
  - Fix a cpufreq mediatek driver build problem (Arnd Bergmann).
 
  - Fix the SMBus transaction handling implementation in the ACPI
    core to avoid re-entrant calls to wait_event_timeout() which
    makes intermittent boot stalls related to the Smart Battery
    Subsystem initialization go away and revert a workaround of
    another problem with the same underlying root cause (Chris
    Bainbridge).
 
  - Fix the generic wakeup interrupts framework to avoid using
    invalid IRQ numbers (Dmitry Torokhov).
 
  - Remove a redundant check from the ACPI EC driver (Markus Elfring).
 
  - Modify the intel_pstate driver so it can support more Atom flavors
    than just one (Baytrail) and add support for Atom Airmont cores
    (which require new freqnency tables) to it (Philippe Longepe).
 
  - Clean up MSR-related symbols in turbostat (Len Brown).
 
 /
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Merge tag 'pm+acpi-4.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull more power management and ACPI updates from Rafael Wysocki:
 "These are mostly fixes and cleanups (ACPI core, PM core, cpufreq, ACPI
  EC driver, device properties) including three reverts of recent
  intel_pstate driver commits due to a regression introduced by one of
  them plus support for Atom Airmont cores in intel_pstate (which really
  boils down to adding new frequency tables for Airmont) and additional
  turbostat updates.

  Specifics:

   - Revert three recent intel_pstate driver commits one of which
     introduced a regression and the remaining two depend on the
     problematic one (Rafael Wysocki).

   - Fix breakage related to the recently introduced ACPI _CCA object
     support in the PCI DMA setup code (Suravee Suthikulpanit).

   - Fix up the recently introduced ACPI CPPC support to only use the
     hardware-reduced version of the PCCT structure as the only
     architecture to support it (ARM64) will only use hardware-reduced
     ACPI anyway (Ashwin Chaugule).

   - Fix a cpufreq mediatek driver build problem (Arnd Bergmann).

   - Fix the SMBus transaction handling implementation in the ACPI core
     to avoid re-entrant calls to wait_event_timeout() which makes
     intermittent boot stalls related to the Smart Battery Subsystem
     initialization go away and revert a workaround of another problem
     with the same underlying root cause (Chris Bainbridge).

   - Fix the generic wakeup interrupts framework to avoid using invalid
     IRQ numbers (Dmitry Torokhov).

   - Remove a redundant check from the ACPI EC driver (Markus Elfring).

   - Modify the intel_pstate driver so it can support more Atom flavors
     than just one (Baytrail) and add support for Atom Airmont cores
     (which require new freqnency tables) to it (Philippe Longepe).

   - Clean up MSR-related symbols in turbostat (Len Brown)"

* tag 'pm+acpi-4.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  PCI: Fix OF logic in pci_dma_configure()
  Revert "Documentation: kernel_parameters for Intel P state driver"
  cpufreq: mediatek: fix build error
  cpufreq: intel_pstate: Add separate support for Airmont cores
  cpufreq: intel_pstate: Replace BYT with ATOM
  Revert "cpufreq: intel_pstate: Use ACPI perf configuration"
  Revert "cpufreq: intel_pstate: Avoid calculation for max/min"
  ACPI-EC: Drop unnecessary check made before calling acpi_ec_delete_query()
  Revert "ACPI / SBS: Add 5 us delay to fix SBS hangs on MacBook"
  ACPI / SMBus: Fix boot stalls / high CPU caused by reentrant code
  PM / wakeirq: check that wake IRQ is valid before accepting it
  ACPI / CPPC: Use h/w reduced version of the PCCT structure
  x86: remove unused definition of MSR_NHM_PLATFORM_INFO
  tools/power turbostat: use new name for MSR_PLATFORM_INFO
2015-11-20 09:01:07 -08:00
Linus Torvalds 2f255351c1 powerpc fixes for 4.4
- Wire up sys_mlock2()
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Merge tag 'powerpc-4.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc fixlet from Michael Ellerman:
 "Wire up sys_mlock2()"

* tag 'powerpc-4.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc: Wire up sys_mlock2()
2015-11-20 08:20:04 -08:00
Linus Torvalds 86eaf54d07 dmaengine fixes for 4.4-rc2
This has odd fixes spreadout drivers, not major here
    - usbdmac fixes for pm
    - edma build and logic fixes
    - build warn fixes for few drivers
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Merge tag 'dmaengine-fix-4.4-rc2' of git://git.infradead.org/users/vkoul/slave-dma

Pull dmaengine fixes from Vinod Koul:
 "This has odd fixes spreadout drivers, not major here

   - usbdmac fixes for pm
   - edma build and logic fixes
   - build warn fixes for few drivers"

* tag 'dmaengine-fix-4.4-rc2' of git://git.infradead.org/users/vkoul/slave-dma:
  dmaengine: at_hdmac: use %pad format string for dma_addr_t
  dmaengine: at_xdmac: use %pad format string for dma_addr_t
  dmaengine: imx-sdma: remove __init annotation on sdma_event_remap
  dmaengine: edma: predecence bug in GET_NUM_QDMACH()
  dmaengine: edma: fix build without CONFIG_OF
  dmaengine: of_dma: Correct return code for of_dma_request_slave_channel in case !CONFIG_OF
  dmaengine: sh: usb-dmac: Fix pm_runtime_{enable,disable}() imbalance
  dmaengine: sh: usb-dmac: Fix crash on runtime suspend
2015-11-19 20:51:31 -08:00
Linus Torvalds c69bde78f0 Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Pull drm fixes from Dave Airlie:
 "A varied bunch of fixes, the radeon pull is probably a bit larger than
  I'd like, but it contains 2 weeks of stuff, and the Fiji fixes are a
  bit large, but they are Fiji specific.

  Otherwise:

   - mgag200: One cursor regression oops fix.
   - vc4: A few small fixes and cleanups.
   - core: Atomic fixes and Atomic helper fixes
   - i915: Revert for the backlight regression along with a bunch of
     fixes"

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: (58 commits)
  drm/atomic-helper: Check encoder/crtc constraints
  Revert "drm/i915: skip modeset if compatible for everyone."
  drm/mgag200: fix kernel hang in cursor code.
  drm/amdgpu: reserve/unreserve objects out of map/unmap operations
  drm/amdgpu: move bo_reserve out of amdgpu_vm_clear_bo
  drm/amdgpu: add lock for interval tree in vm
  drm/amdgpu: keep the owner for VMIDs
  drm/amdgpu: move VM manager clean into the VM code again
  drm/amdgpu: cleanup VM coding style
  drm/amdgpu: remove unused VM manager field
  drm/amdgpu: cleanup scheduler command submission
  drm/amdgpu: fix typo in firmware name
  drm/i915: Consider SPLL as another shared pll, v2.
  drm/i915: Fix gpu frequency change tracing
  drm/vc4: Make sure that planes aren't scaled.
  drm/vc4: Fix some failure to track __iomem decorations on pointers.
  drm/vc4: checking for NULL instead of IS_ERR
  drm/vc4: fix itnull.cocci warnings
  drm/vc4: fix platform_no_drv_owner.cocci warnings
  drm/vc4: vc4_plane_duplicate_state() can be static
  ...
2015-11-19 20:39:38 -08:00
Linus Torvalds cd6caf550a ome fixes for small IPMI problems.
The most significant is that the driver wasn't starting the timer
 for some messages, which would result in problems if that message
 failed for some reason.
 
 The others are small optimizations or making things a little neater.
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Merge tag 'for-linus-4.4' of git://git.code.sf.net/p/openipmi/linux-ipmi

Pull IPMI updates from Corey Minyard:
 "Some fixes for small IPMI problems.

  The most significant is that the driver wasn't starting the timer for
  some messages, which would result in problems if that message failed
  for some reason.

  The others are small optimizations or making things a little neater"

* tag 'for-linus-4.4' of git://git.code.sf.net/p/openipmi/linux-ipmi:
  ipmi watchdog : add panic_wdt_timeout parameter
  char: ipmi: Move MODULE_DEVICE_TABLE() to follow struct
  ipmi: Stop the timer immediately if idle
  ipmi: Start the timer and thread on internal msgs
2015-11-19 18:14:47 -08:00
Linus Torvalds 8bdddfae65 SH Drivers Updates for v4.4
* Remove now unnecessary reference to CONFIG_ARCH_SHMOBILE_MULTI
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Merge tag 'renesas-sh-drivers-for-v4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas

Pull SH driver fixlet from Simon Horman:
 "I am sending this change after v4.4-rc1 has been released as it
  depends on SoC changes which are present in that rc:

   = Remove now unnecessary reference to CONFIG_ARCH_SHMOBILE_MULTI"

* tag 'renesas-sh-drivers-for-v4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
  drivers: sh: Get rid of CONFIG_ARCH_SHMOBILE_MULTI
2015-11-19 17:58:44 -08:00
Rafael J. Wysocki a3767e3c9d Merge branches 'acpi-smbus', 'acpi-ec' and 'acpi-pci'
* acpi-smbus:
  Revert "ACPI / SBS: Add 5 us delay to fix SBS hangs on MacBook"
  ACPI / SMBus: Fix boot stalls / high CPU caused by reentrant code

* acpi-ec:
  ACPI-EC: Drop unnecessary check made before calling acpi_ec_delete_query()

* acpi-pci:
  PCI: Fix OF logic in pci_dma_configure()
2015-11-20 01:22:52 +01:00
Rafael J. Wysocki 0aba0ab891 Merge branch 'pm-sleep'
* pm-sleep:
  PM / wakeirq: check that wake IRQ is valid before accepting it
2015-11-20 01:22:33 +01:00
Rafael J. Wysocki 9832bf3a35 Merge branches 'pm-cpufreq' and 'acpi-cppc'
* pm-cpufreq:
  Revert "Documentation: kernel_parameters for Intel P state driver"
  cpufreq: mediatek: fix build error
  cpufreq: intel_pstate: Add separate support for Airmont cores
  cpufreq: intel_pstate: Replace BYT with ATOM
  Revert "cpufreq: intel_pstate: Use ACPI perf configuration"
  Revert "cpufreq: intel_pstate: Avoid calculation for max/min"

* acpi-cppc:
  ACPI / CPPC: Use h/w reduced version of the PCCT structure
2015-11-20 01:22:10 +01:00
Suravee Suthikulpanit 768acd64d6 PCI: Fix OF logic in pci_dma_configure()
This patch fixes a bug introduced by previous commit,
which incorrectly checkes the of_node of the end-point device.
Instead, it should check the of_node of the host bridge.

Fixes: 50230713b6 ("PCI: OF: Move of_pci_dma_configure() to pci_dma_configure()")
Reported-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-11-20 01:20:36 +01:00
Dave Airlie 2d591ab18a Merge tag 'drm-intel-fixes-2015-11-19' of git://anongit.freedesktop.org/drm-intel into drm-fixes
i915 fixes for 4.4, including the revert for the backlight regression
Olof reported. Otherwise fixes all around.

* tag 'drm-intel-fixes-2015-11-19' of git://anongit.freedesktop.org/drm-intel:
  Revert "drm/i915: skip modeset if compatible for everyone."
  drm/i915: Consider SPLL as another shared pll, v2.
  drm/i915: Fix gpu frequency change tracing
  drm/i915: Don't clobber the addfb2 ioctl params
  drm/i915: Clear intel_crtc->atomic before updating it.
  drm/i915: get runtime PM reference around GEM set_caching IOCTL
  drm/i915: Fix GT frequency rounding
  drm/i915: quirk backlight present on Macbook 4, 1
  drm/i915: Fix crtc_y assignment in intel_find_initial_plane_obj()
2015-11-20 09:45:31 +10:00
Dave Airlie db3956372f Merge tag 'topic/drm-fixes-2015-11-19' of git://anongit.freedesktop.org/drm-intel into drm-fixes
Here are some drm core fixes for v4.4 that I've picked up. Atomic fixes
from Maarten, and atomic helper fixes from Ville and Daniel.

Admittedly the topmost commit didn't sit in our tree for very long, but
does come with reviews and testing from trustworthy people.

* tag 'topic/drm-fixes-2015-11-19' of git://anongit.freedesktop.org/drm-intel:
  drm/atomic-helper: Check encoder/crtc constraints
  drm: Fix primary plane size for stereo doubled modes for legacy setcrtc
  drm/core: Fix old_fb handling in pan_display_atomic.
  drm/core: Fix old_fb handling in restore_fbdev_mode_atomic.
  drm/atomic: add a drm_atomic_clean_old_fb helper.
  drm/core: Fix old_fb handling in drm_mode_atomic_ioctl.
  drm/core: Set legacy_cursor_update in drm_atomic_helper_disable_plane.
2015-11-20 09:44:50 +10:00
Dan Williams 2e6edc9538 block: protect rw_page against device teardown
Fix use after free crashes like the following:

 general protection fault: 0000 [#1] SMP
 Call Trace:
  [<ffffffffa0050216>] ? pmem_do_bvec.isra.12+0xa6/0xf0 [nd_pmem]
  [<ffffffffa0050ba2>] pmem_rw_page+0x42/0x80 [nd_pmem]
  [<ffffffff8128fd90>] bdev_read_page+0x50/0x60
  [<ffffffff812972f0>] do_mpage_readpage+0x510/0x770
  [<ffffffff8128fd20>] ? I_BDEV+0x20/0x20
  [<ffffffff811d86dc>] ? lru_cache_add+0x1c/0x50
  [<ffffffff81297657>] mpage_readpages+0x107/0x170
  [<ffffffff8128fd20>] ? I_BDEV+0x20/0x20
  [<ffffffff8128fd20>] ? I_BDEV+0x20/0x20
  [<ffffffff8129058d>] blkdev_readpages+0x1d/0x20
  [<ffffffff811d615f>] __do_page_cache_readahead+0x28f/0x310
  [<ffffffff811d6039>] ? __do_page_cache_readahead+0x169/0x310
  [<ffffffff811c5abd>] ? pagecache_get_page+0x2d/0x1d0
  [<ffffffff811c76f6>] filemap_fault+0x396/0x530
  [<ffffffff811f816e>] __do_fault+0x4e/0xf0
  [<ffffffff811fce7d>] handle_mm_fault+0x11bd/0x1b50

Cc: <stable@vger.kernel.org>
Cc: Jens Axboe <axboe@fb.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Reported-by: kbuild test robot <lkp@intel.com>
Acked-by: Matthew Wilcox <willy@linux.intel.com>
[willy: symmetry fixups]
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2015-11-19 13:47:10 -08:00
Linus Torvalds b4ba1f0f65 arm64 fixes:
- Fix size alignment in __iommu_{alloc,free}_attrs
 - Kernel memory mapping fix with CONFIG_DEBUG_RODATA for page sizes
   other than 4KB and a fix of the mark_rodata_ro permissions
 - dma_get_ops() simplification and behaviour alignment between DT and
   ACPI
 - function_graph trace fix for cpu_suspend() (CPUs returning from deep
   sleep via a different path and confusing the tracer)
 - Use of non-global mappings for UEFI run-time services to avoid a
   (potentially theoretical) TLB conflict
 - Crypto priority reduction of core AES cipher (the accelerated
   asynchronous implementation is preferred when available)
 - Reverting an old commit that removed BogoMIPS from /proc/cpuinfo on
   arm64. Apparently, we had it for a relatively short time and libvirt
   started checking for its presence
 - Compiler warnings fixed (ptrace.h inclusion from compat.h,
   smp_load_acquire with const argument)
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 fixes from Catalin Marinas:

 - Fix size alignment in __iommu_{alloc,free}_attrs

 - Kernel memory mapping fix with CONFIG_DEBUG_RODATA for page sizes
   other than 4KB and a fix of the mark_rodata_ro permissions

 - dma_get_ops() simplification and behaviour alignment between DT and
   ACPI

 - function_graph trace fix for cpu_suspend() (CPUs returning from deep
   sleep via a different path and confusing the tracer)

 - Use of non-global mappings for UEFI run-time services to avoid a
   (potentially theoretical) TLB conflict

 - Crypto priority reduction of core AES cipher (the accelerated
   asynchronous implementation is preferred when available)

 - Reverting an old commit that removed BogoMIPS from /proc/cpuinfo on
   arm64.  Apparently, we had it for a relatively short time and libvirt
   started checking for its presence

 - Compiler warnings fixed (ptrace.h inclusion from compat.h,
   smp_load_acquire with const argument)

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: restore bogomips information in /proc/cpuinfo
  arm64: barriers: fix smp_load_acquire to work with const arguments
  arm64: Fix R/O permissions in mark_rodata_ro
  arm64: crypto: reduce priority of core AES cipher
  arm64: use non-global mappings for UEFI runtime regions
  arm64: kernel: pause/unpause function graph tracer in cpu_suspend()
  arm64: do not include ptrace.h from compat.h
  arm64: simplify dma_get_ops
  arm64: mm: use correct mapping granularity under DEBUG_RODATA
  arm64/dma-mapping: Fix sizes in __iommu_{alloc,free}_attrs
2015-11-19 12:21:23 -08:00
Linus Torvalds a3d66b5a17 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching
Pull livepatching fix from Jiri Kosina:
 "A fix for module handling in case kASLR has been enabled, from Zhou
  Chengming"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching:
  livepatch: x86: fix relocation computation with kASLR
2015-11-19 12:16:12 -08:00
Linus Torvalds 319645cac2 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid
Pull HID fixes from Jiri Kosina:
 "Two functional fixes for wacom HID driver from Ping Cheng and Jiri
  Kosina"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid:
  HID: wacom: fixup quirks setup for WACOM_DEVICETYPE_PAD
  HID: wacom: Add outbounding area for DTU1141
2015-11-19 12:10:51 -08:00
Linus Torvalds 1282ac407c MMC core:
- Improve reliability when selecting HS200 mode
  - Improve reliability when selecting HS400 mode
  - mmc: remove bondage between REQ_META and reliable write
 
 MMC host:
  - pxamci: Fix read-only gpio detection polarity
  - mtk-sd: Preinitialize delay_phase to fix the case when delay is zero
  - android-goldfish: Fix build dependency by adding HAS_DMA
  - dw_mmc: Remove Seungwon Jeon from MAINTAINERS
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Merge tag 'mmc-v4.4-rc1' of git://git.linaro.org/people/ulf.hansson/mmc

Pull MMC fixes from Ulf Hansson:
 "Here are some mmc fixes intended for v4.4 rc2.  It's based on a commit
  prior rc1 as I wanted to get them a bit more tested in next before
  sending you the pull request.

  MMC core:
   - Improve reliability when selecting HS200 mode
   - Improve reliability when selecting HS400 mode
   - mmc: remove bondage between REQ_META and reliable write

  MMC host:
   - pxamci: Fix read-only gpio detection polarity
   - mtk-sd: Preinitialize delay_phase to fix the case when delay is zero
   - android-goldfish: Fix build dependency by adding HAS_DMA
   - dw_mmc: Remove Seungwon Jeon from MAINTAINERS"

* tag 'mmc-v4.4-rc1' of git://git.linaro.org/people/ulf.hansson/mmc:
  mmc: remove bondage between REQ_META and reliable write
  mmc: MMC_GOLDFISH should depend on HAS_DMA
  mmc: mediatek: Preinitialize delay_phase in get_best_delay()
  MAINTAINERS: mmc: Remove Seungwon Jeon from dw_mmc
  mmc: mmc: Improve reliability of mmc_select_hs400()
  mmc: mmc: Move mmc_switch_status()
  mmc: mmc: Fix HS setting in mmc_select_hs400()
  mmc: mmc: Improve reliability of mmc_select_hs200()
  mmc: pxamci: fix read-only gpio detection polarity
2015-11-19 11:33:58 -08:00
Yang Shi 92e788b749 arm64: restore bogomips information in /proc/cpuinfo
As previously reported, some userspace applications depend on bogomips
showed by /proc/cpuinfo. Although there is much less legacy impact on
aarch64 than arm, it does break libvirt.

This patch reverts commit 326b16db9f ("arm64: delay: don't bother
reporting bogomips in /proc/cpuinfo"), but with some tweak due to
context change and without the pr_info().

Fixes: 326b16db9f ("arm64: delay: don't bother reporting bogomips in /proc/cpuinfo")
Signed-off-by: Yang Shi <yang.shi@linaro.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Cc: <stable@vger.kernel.org> # 3.12+
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2015-11-19 17:57:18 +00:00
Daniel Vetter 5481c8fb1d drm/atomic-helper: Check encoder/crtc constraints
This was totally lost when I originally created the atomic helpers.

We probably should also check possible_clones in the helpers, but
since the legacy ones didn't do that this is for a separate patch.

Reported-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Daniel Stone <daniels@collabora.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Tested-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1447868808-10266-1-git-send-email-daniel.vetter@ffwll.ch
2015-11-19 17:11:13 +02:00
Jani Nikula 7383123647 Revert "drm/i915: skip modeset if compatible for everyone."
This reverts

commit 6764e9f872
Author: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Date:   Thu Aug 27 15:44:06 2015 +0200

    drm/i915: skip modeset if compatible for everyone.

Bring back the i915.fastboot module parameter, disabled by default, due
to backlight regression on Chromebook Pixel 2015.

Apparently the firmware of the Chromebook in question enables the panel
but disables backlight to avoid a brief garbage scanout upon loading the
kernel/module. With fastboot, we leave the backlight untouched, in this
case disabled. The user would have to do a modeset (i.e. not just crank
up the brightness) to enable the backlight.

There is no clean fix readily available, so get back to the drawing
board by reverting.

[N.B. The reference below is for when the thread was included on public
lists, and some of the context had already been dropped by then.]

Reported-and-tested-by: Olof Johansson <olof@lixom.net>
Acked-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
References: http://marc.info/?i=CAKMK7uES7xk05ki92oeX6gmvZWAh9f2vL7yz=6T+fGK9J3X7cQ@mail.gmail.com
Fixes: 6764e9f872 ("drm/i915: skip modeset if compatible for everyone.")
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1447921590-3785-1-git-send-email-jani.nikula@intel.com
2015-11-19 10:38:09 +02:00
Wang, Rui Y f6619ef750 drm/mgag200: fix kernel hang in cursor code.
The machine hang completely with the following message on the console:

[  487.777538] BUG: unable to handle kernel NULL pointer dereference at 0000000000000060
[  487.777554] IP: [<ffffffff8158aaee>] _raw_spin_lock+0xe/0x30
[  487.777557] PGD 42e9f7067 PUD 42f2fa067 PMD 0
[  487.777560] Oops: 0002 [#1] SMP
...
[  487.777618] CPU: 21 PID: 3190 Comm: Xorg Tainted: G            E   4.4.0-rc1-3-default+ #6
[  487.777620] Hardware name: Intel Corporation BRICKLAND/BRICKLAND, BIOS BRHSXSD1.86B.0059.R00.1501081238 01/08/2015
[  487.777621] task: ffff880853ae4680 ti: ffff8808696d4000 task.ti: ffff8808696d4000
[  487.777625] RIP: 0010:[<ffffffff8158aaee>]  [<ffffffff8158aaee>] _raw_spin_lock+0xe/0x30
[  487.777627] RSP: 0018:ffff8808696d79c0  EFLAGS: 00010246
[  487.777628] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  487.777629] RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000060
[  487.777630] RBP: ffff8808696d79e0 R08: 0000000000000000 R09: ffff88086924a780
[  487.777631] R10: 000000000001bb40 R11: 0000000000003246 R12: 0000000000000000
[  487.777632] R13: ffff880463a27360 R14: ffff88046ca50218 R15: 0000000000000080
[  487.777634] FS:  00007f3f81c5a8c0(0000) GS:ffff88086f060000(0000) knlGS:0000000000000000
[  487.777635] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  487.777636] CR2: 0000000000000060 CR3: 000000042e678000 CR4: 00000000001406e0
[  487.777638] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  487.777639] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  487.777639] Stack:
[  487.777642]  ffffffffa00eb5fa ffff8808696d7b60 ffff88086b87d800 0000000000000000
[  487.777644]  ffff8808696d7ac8 ffffffffa01694b6 ffff8808696d7ae8 ffffffff8109c8d5
[  487.777647]  ffff880469158740 ffff880463a27000 ffff88086b87d800 ffff88086b87d800
[  487.777647] Call Trace:
[  487.777674]  [<ffffffffa00eb5fa>] ? drm_gem_object_lookup+0x1a/0xa0 [drm]
[  487.777681]  [<ffffffffa01694b6>] mga_crtc_cursor_set+0xc6/0xb60 [mgag200]
[  487.777691]  [<ffffffff8109c8d5>] ? find_busiest_group+0x35/0x4a0
[  487.777696]  [<ffffffff81086294>] ? __might_sleep+0x44/0x80
[  487.777699]  [<ffffffff815888c2>] ? __ww_mutex_lock+0x22/0x9c
[  487.777722]  [<ffffffffa0104f64>] ? drm_modeset_lock+0x34/0xf0 [drm]
[  487.777733]  [<ffffffffa0148d9e>] restore_fbdev_mode+0xee/0x2a0 [drm_kms_helper]
[  487.777742]  [<ffffffffa014afce>] drm_fb_helper_restore_fbdev_mode_unlocked+0x2e/0x70 [drm_kms_helper]
[  487.777748]  [<ffffffffa014b037>] drm_fb_helper_set_par+0x27/0x50 [drm_kms_helper]
[  487.777752]  [<ffffffff8134560c>] fb_set_var+0x18c/0x3f0
[  487.777777]  [<ffffffffa02a9b0a>] ? __ext4_handle_dirty_metadata+0x8a/0x210 [ext4]
[  487.777783]  [<ffffffff8133cb97>] fbcon_blank+0x1b7/0x2b0
[  487.777790]  [<ffffffff813be2a3>] do_unblank_screen+0xb3/0x1c0
[  487.777795]  [<ffffffff813b5aba>] vt_ioctl+0x118a/0x1210
[  487.777801]  [<ffffffff813a8fe0>] tty_ioctl+0x3f0/0xc90
[  487.777808]  [<ffffffff81172018>] ? kzfree+0x28/0x30
[  487.777813]  [<ffffffff811e053f>] ? mntput+0x1f/0x30
[  487.777817]  [<ffffffff811d3f5d>] do_vfs_ioctl+0x30d/0x570
[  487.777822]  [<ffffffff8107ed3a>] ? task_work_run+0x8a/0xa0
[  487.777825]  [<ffffffff811d4234>] SyS_ioctl+0x74/0x80
[  487.777829]  [<ffffffff8158aeae>] entry_SYSCALL_64_fastpath+0x12/0x71
[  487.777851] Code: 65 ff 0d ce 02 a8 7e 5d c3 ba 01 00 00 00 f0 0f b1 17 85 c0 75 e8 b0 01 5d c3 0f 1f 00 65 ff 05 b1 02 a8 7e 31 c0 ba 01 00 00 00 <f0> 0f b1 17 85 c0 75 01 c3 55 89 c6 48 89 e5 e8 4e f5 b1 ff 5d
[  487.777854] RIP  [<ffffffff8158aaee>] _raw_spin_lock+0xe/0x30
[  487.777855]  RSP <ffff8808696d79c0>
[  487.777856] CR2: 0000000000000060
[  487.777860] ---[ end trace 672a2cd555e0ebd3 ]---

The cursor code may be entered with file_priv == NULL && handle == NULL.
The problem was introduced by:

"bf89209 drm/mga200g: Hold a proper reference for cursor_set"

which calls drm_gem_object_lookup(dev, file_priv...). Previously this wasn't
a problem because we checked the handle. Move the check early in the function
can fix the problem.

Signed-off-by: Rui Wang <rui.y.wang@intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2015-11-19 13:20:01 +10:00
Dave Airlie e6c84acb3a Merge branch 'drm-vc4-fixes' of git://github.com/anholt/linux into drm-fixes
Here are a few little VC4 fixes for 4.4 that I didn't get in to you
before the -next pull request.  I dropped the feature-ish one I'd
mentioned, and also droppped the one I saw you included in the last
-fixes pull request.

* 'drm-vc4-fixes' of git://github.com/anholt/linux:
  drm/vc4: Make sure that planes aren't scaled.
  drm/vc4: Fix some failure to track __iomem decorations on pointers.
  drm/vc4: checking for NULL instead of IS_ERR
  drm/vc4: fix itnull.cocci warnings
  drm/vc4: fix platform_no_drv_owner.cocci warnings
  drm/vc4: vc4_plane_duplicate_state() can be static
2015-11-19 13:17:08 +10:00
Dave Airlie 8ed59fd6d4 Merge branch 'drm-fixes-4.4' of git://people.freedesktop.org/~agd5f/linux into drm-fixes
Radeon and amdgpu fixes for 4.4.  A bit more the usual since I missed
last week.  Misc fixes all over the place.  The big changes are the
tiling configuration fixes for Fiji.

* 'drm-fixes-4.4' of git://people.freedesktop.org/~agd5f/linux: (35 commits)
  drm/amdgpu: reserve/unreserve objects out of map/unmap operations
  drm/amdgpu: move bo_reserve out of amdgpu_vm_clear_bo
  drm/amdgpu: add lock for interval tree in vm
  drm/amdgpu: keep the owner for VMIDs
  drm/amdgpu: move VM manager clean into the VM code again
  drm/amdgpu: cleanup VM coding style
  drm/amdgpu: remove unused VM manager field
  drm/amdgpu: cleanup scheduler command submission
  drm/amdgpu: fix typo in firmware name
  drm/amdgpu: remove the unnecessary parameter adev for amdgpu_sa_bo_new()
  drm/amdgpu: wait interruptible when semaphores are disabled v2
  drm/amdgpu: update pd while updating vm as well
  drm/amdgpu: fix handling order in scheduler CS
  drm/amdgpu: fix incorrect mutex usage v3
  drm/amdgpu: cleanup scheduler fence get/put dance
  drm/amdgpu: add command submission workflow tracepoint
  drm/amdgpu: update Fiji's tiling mode table
  drm/amdgpu: fix bug that can't enter thermal interrupt for bonaire.
  drm/amdgpu: fix seq_printf format string
  drm/radeon: fix quirk for MSI R7 370 Armor 2X
  ...
2015-11-19 13:15:17 +10:00
Yigal Korman 0df9d41ab5 mm, dax: fix DAX deadlocks (COW fault)
DAX handling of COW faults has wrong locking sequence:
	dax_fault does i_mmap_lock_read
	do_cow_fault does i_mmap_unlock_write

Ross's commit[1] missed a fix[2] that Kirill added to Matthew's
commit[3].

Original COW locking logic was introduced by Matthew here[4].

This should be applied to v4.3 as well.

[1] 0f90cc6609 mm, dax: fix DAX deadlocks
[2] 52a2b53ffd mm, dax: use i_mmap_unlock_write() in do_cow_fault()
[3] 843172978b dax: fix race between simultaneous faults
[4] 2e4cdab058 mm: allow page fault handlers to perform the COW

Cc: <stable@vger.kernel.org>
Cc: Boaz Harrosh <boaz@plexistor.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Dave Chinner <dchinner@redhat.com>
Cc: Jan Kara <jack@suse.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Matthew Wilcox <matthew.r.wilcox@intel.com>
Acked-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Yigal Korman <yigal@plexistor.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2015-11-18 16:54:36 -08:00
Rafael J. Wysocki 3bf7f56e70 Revert "Documentation: kernel_parameters for Intel P state driver"
Revert commit 053f56def5 (Documentation: kernel_parameters for Intel P
state driver) as the code documented by it has been reverted already.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-11-19 00:42:23 +01:00
Arnd Bergmann 2d4ee30367 cpufreq: mediatek: fix build error
The recently added mt8173 cpufreq driver relies on the cpu topology
that is always present on ARM64 but optional on ARM32:

drivers/cpufreq/mt8173-cpufreq.c: In function 'mtk_cpufreq_init':
drivers/cpufreq/mt8173-cpufreq.c:441:30: error: 'cpu_topology' undeclared (first use in this function)
  cpumask_copy(policy->cpus, &cpu_topology[policy->cpu].core_sibling);

This refines the Kconfig dependencies so that we can still build on
ARM32, but only if COMPILE_TEST is selected and the CPU topology
code is present.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-11-19 00:21:47 +01:00
Philippe Longepe 1421df63c3 cpufreq: intel_pstate: Add separate support for Airmont cores
There are two flavors of Atom cores to be supported by intel_pstate,
Silvermont and Airmont, so make the driver distinguish between them by
adding separate frequency tables.

Separate the CPU defaults params for each of them and match the CPU IDs
against them as appropriate.

Signed-off-by: Philippe Longepe <philippe.longepe@linux.intel.com>
Signed-off-by: Stephane Gasparini <stephane.gasparini@linux.intel.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
[ rjw: Subject and changelog ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-11-19 00:21:46 +01:00
Philippe Longepe 938d21a2a6 cpufreq: intel_pstate: Replace BYT with ATOM
Rename symbol and function names starting with "BYT" or "byt" to
start with "ATOM" or "atom", respectively, so as to make it clear
that they may apply to Atom in general and not just to Baytrail
(the goal is to support several Atoms architectures eventually).

This should not lead to any functional changes.

Signed-off-by: Philippe Longepe <philippe.longepe@linux.intel.com>
Signed-off-by: Stephane Gasparini <stephane.gasparini@linux.intel.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
[ rjw : Changelog ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-11-19 00:21:46 +01:00
Rafael J. Wysocki 6ee11e413c Revert "cpufreq: intel_pstate: Use ACPI perf configuration"
Revert commit 37afb00032 (cpufreq: intel_pstate: Use ACPI perf
configuration) that is reported to cause a regression to happen
on a system where invalid data are returned by the ACPI _PSS object.

Since that commit makes assumptions regarding the _PSS output
correctness that may turn out to be overly optimistic in general,
there is a concern that it may introduce regression on more
systems, so it's better to revert it now and we'll revisit the
underlying issue in the next cycle with a more robust solution.

Conflicts:
        drivers/cpufreq/intel_pstate.c

Fixes: 37afb00032 (cpufreq: intel_pstate: Use ACPI perf configuration)
Reported-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-11-19 00:20:42 +01:00
Rafael J. Wysocki 799281a3c4 Revert "cpufreq: intel_pstate: Avoid calculation for max/min"
Revert commit 4ef4514870 (cpufreq: intel_pstate: Avoid calculation for
max/min) as it depends on commit 37afb00032 (cpufreq: intel_pstate: Use
ACPI perf configuration) that causes problems to happen and needs to be
reverted.

Conflicts:
	drivers/cpufreq/intel_pstate.c

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-11-18 23:29:56 +01:00
Will Deacon c139aa60c1 arm64: barriers: fix smp_load_acquire to work with const arguments
A newly introduced function in include/net/sock.h passes a const
argument to smp_load_acquire:

  static inline int sk_state_load(const struct sock *sk)
  {
	return smp_load_acquire(&sk->sk_state);
  }

This cause an allmodconfig build failure, since our underlying
load-acquire implementation does not handle const types correctly:

  include/net/sock.h: In function 'sk_state_load':
  ./arch/arm64/include/asm/barrier.h:71:3: error: read-only variable '___p1' used as 'asm' output
     asm volatile ("ldarb %w0, %1"    \

This patch fixes the problem by reusing the trick in READ_ONCE that
loads via a non-const member of an anonymous union. This has the
advantage of allowing us to use smp_load_acquire on packed structures
(e.g. arch_spinlock_t) as well as primitive types.

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: David Daney <david.daney@cavium.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Reported-by: Arnd Bergmann <arnd@arndb.de>
Reported-by: David Daney <david.daney@cavium.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2015-11-18 18:06:43 +00:00
Linus Torvalds 34258a32d9 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 fixes from Martin Schwidefsky:
 "Assorted bug fixes, the mlock2 system call gets added, and one
  improvement.  The boot from dasd devices is now possible from a wider
  range of devices"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390: remove SALIPL loader
  s390: wire up mlock2 system call
  s390: remove g5 elf platform support
  s390: avoid cache aliasing under z/VM and KVM
  s390/sclp: _sclp_wait_int(): retain full PSW mask
  s390/zcrypt: Fix initialisation when zcrypt is built-in
  s390/zcrypt: Fix kernel crash on systems without AP bus support
  s390: add support for ipl devices in subchannel sets > 0
  s390/ipl: fix out of bounds access in scpdata_write
  s390/pci_dma: improve debugging of errors during dma map
  s390/pci_dma: handle dma table failures
  s390/pci_dma: unify label of invalid translation table entries
  s390/syscalls: remove system call number calculation
  s390/cio: simplify css_generate_pgid
  s390/diag: add a s390 prefix to the diagnose trace point
  s390/head: fix error message on unsupported hardware
2015-11-18 08:59:29 -08:00
Linus Torvalds 0d77a123ff hwmon fixes for v4.4-rc2
Fix build issues in scpi and ina2xx drivers, update scpi driver to
 support recent firmware, and fix an uninitialized variable warning
 in applesmc driver.
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Merge tag 'hwmon-for-linus-v4.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging

Pull hwmon fixes from Guenter Roeck:
 "Fix build issues in scpi and ina2xx drivers, update scpi driver to
  support recent firmware, and fix an uninitialized variable warning in
  applesmc driver"

* tag 'hwmon-for-linus-v4.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: (scpi) skip unsupported sensors properly
  hwmon: (scpi) add thermal-of dependency
  hwmon : (applesmc) Fix uninitialized variables warnings
  hwmon: (ina2xx) Fix build issue by selecting REGMAP_I2C
2015-11-18 08:43:29 -08:00
Chunming Zhou 49b02b180a drm/amdgpu: reserve/unreserve objects out of map/unmap operations
Change-Id: Id6514f2fb6e002437fdbe99353d5d35f4ac736c7
Signed-off-by: Chunming Zhou <David1.Zhou@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
2015-11-18 11:41:20 -05:00
Chunming Zhou ef9f0a83d6 drm/amdgpu: move bo_reserve out of amdgpu_vm_clear_bo
Change-Id: Ifbb0c06680494bfa04d0be5e5941d31ae2e5ef28
Signed-off-by: Chunming Zhou <David1.Zhou@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
2015-11-18 11:41:02 -05:00
Chunming Zhou c25867dfab drm/amdgpu: add lock for interval tree in vm
Change-Id: I62b892a22af37b32e6b4aefca80a25cf45426ed2
Signed-off-by: Chunming Zhou <David1.Zhou@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
2015-11-18 11:40:55 -05:00
Christian König 1c16c0a7b2 drm/amdgpu: keep the owner for VMIDs
We don't need the last VM use any more, keep the owner directly.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <davdi1.zhou@amd.com>
2015-11-18 11:40:37 -05:00
Christian König ea89f8c9e8 drm/amdgpu: move VM manager clean into the VM code again
It's not a good idea to duplicate that code.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <davdi1.zhou@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
2015-11-18 11:40:27 -05:00
Christian König 8b4fb00b5d drm/amdgpu: cleanup VM coding style
Fix the indentation and move the VM functions to the structures.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <davdi1.zhou@amd.com>
Reviewed-by: Junwei Zhang <Jerry.Zhang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
2015-11-18 11:40:00 -05:00
Christian König eeed25ab83 drm/amdgpu: remove unused VM manager field
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <davdi1.zhou@amd.com>
Reviewed-by: Junwei Zhang <Jerry.Zhang@amd.com>
2015-11-18 11:39:34 -05:00
Christian König 984810fc45 drm/amdgpu: cleanup scheduler command submission
Unify the two code path again, cause they do pretty much the same thing.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <davdi1.zhou@amd.com>
Reviewed-by: Junwei Zhang <Jerry.Zhang@amd.com>
2015-11-18 11:39:12 -05:00
Christian König 2269a39579 drm/amdgpu: fix typo in firmware name
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
2015-11-18 09:33:29 -05:00
Maarten Lankhorst 00490c22b1 drm/i915: Consider SPLL as another shared pll, v2.
When diagnosing a unrelated bug for someone on irc, it would seem the hardware can
be brought up by the BIOS with the embedded displayport using the SPLL for spread spectrum.

Right now this is not handled well in i915, and it calculates the crtc needs to
be reprogrammed on the first modeset without SSC, but  the SPLL itself was kept
active. Fix this by exposing SPLL as a shared pll that will not be returned
by intel_get_shared_dpll; you have to know it exists to use it.

Changes since v1:
- Create a separate dpll_hw_state.spll for spll, and use
  separate pll functions for spll.

Tested-by: Emil Renner Berthing <kernel@esmil.dk>
Tested-by: Gabriel Feceoru <gabriel.feceoru@intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1447681332-6318-1-git-send-email-maarten.lankhorst@linux.intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2015-11-18 15:08:31 +02:00
Laura Abbott 0b2aa5b80b arm64: Fix R/O permissions in mark_rodata_ro
The permissions in mark_rodata_ro trigger a build error
with STRICT_MM_TYPECHECKS. Fix this by introducing
PAGE_KERNEL_ROX for the same reasons as PAGE_KERNEL_RO.
From Ard:

"PAGE_KERNEL_EXEC has PTE_WRITE set as well, making the range
writeable under the ARMv8.1 DBM feature, that manages the
dirty bit in hardware (writing to a page with the PTE_RDONLY
and PTE_WRITE bits both set will clear the PTE_RDONLY bit in that case)"

Signed-off-by: Laura Abbott <labbott@fedoraproject.org>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2015-11-18 12:11:36 +00:00
Ard Biesheuvel 08c6781cfa arm64: crypto: reduce priority of core AES cipher
The asynchronous, merged implementations of AES in CBC, CTR and XTS
modes are preferred when available (i.e., when instantiating ablkciphers
explicitly). However, the synchronous core AES cipher combined with the
generic CBC mode implementation will produce a 'cbc(aes)' blkcipher that
is callable asynchronously as well. To prevent this implementation from
being used when the accelerated asynchronous implemenation is also
available, lower its priority to 250 (i.e., below the asynchronous
module's priority of 300).

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2015-11-18 12:09:08 +00:00
Ard Biesheuvel 65da0a8e34 arm64: use non-global mappings for UEFI runtime regions
As pointed out by Russell King in response to the proposed ARM version
of this code, the sequence to switch between the UEFI runtime mapping
and current's actual userland mapping (and vice versa) is potentially
unsafe, since it leaves a time window between the switch to the new
page tables and the TLB flush where speculative accesses may hit on
stale global TLB entries.

So instead, use non-global mappings, and perform the switch via the
ordinary ASID-aware context switch routines.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2015-11-18 09:40:20 +00:00
Mika Kuoppala 0f94592efd drm/i915: Fix gpu frequency change tracing
With gen < 9 we have had always 50Mhz units as our hw
ratio. With gen >= 9 the hw ratio changed to 16.667Mhz (50/3).
The result was that our gpu frequency tracing started to output
values 3 times larger than expected due to hardcoded scaling
value. Fix this by using  Use intel_gpu_freq() when generating Mhz
value from ratio for 'intel_gpu_freq_change' trace event.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=92591
Cc: stable@vger.kernel.org # v4.3+
Reported-by: Eero Tamminen <eero.t.tamminen@intel.com>
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1447776866-29384-1-git-send-email-mika.kuoppala@intel.com
2015-11-18 11:22:07 +02:00
Mauro Carvalho Chehab 1ef0623371 kernel-doc: Make it compatible with Perl versions below 5.12 again
Changeset 4d73270192ec('scripts/kernel-doc: Replacing highlights
hash by an array') broke compatibility of the kernel-doc script with
older versions of perl by using "keys ARRAY" syntax with is available
only on Perl 5.12 or newer, according with:
	http://perldoc.perl.org/functions/keys.html

Restore backward compatibility by replacing "foreach my $k (keys ARRAY)"
by a C-like variant: "for (my $k = 0; $k < !ARRAY; $k++)"

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2015-11-17 17:20:14 -07:00