Граф коммитов

589957 Коммитов

Автор SHA1 Сообщение Дата
Miklos Szeredi 38b78a5f18 ovl: ignore permissions on underlying lookup
Generally permission checking is not necessary when overlayfs looks up a
dentry on one of the underlying layers, since search permission on base
directory was already checked in ovl_permission().

More specifically using lookup_one_len() causes a problem when the lower
directory lacks search permission for a specific user while the upper
directory does have search permission.  Since lookups are cached, this
causes inconsistency in behavior: success depends on who did the first
lookup.

So instead use lookup_hash() which doesn't do the permission check.

Reported-by: Ignacy Gawędzki <ignacy.gawedzki@green-communications.fr>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2016-05-10 23:58:18 -04:00
Miklos Szeredi 3c9fe8cdff vfs: add lookup_hash() helper
Overlayfs needs lookup without inode_permission() and already has the name
hash (in form of dentry->d_name on overlayfs dentry).  It also doesn't
support filesystems with d_op->d_hash() so basically it only needs
the actual hashed lookup from lookup_one_len_unlocked()

So add a new helper that does unlocked lookup of a hashed name.

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2016-05-10 23:56:28 -04:00
Miklos Szeredi 9409e22acd vfs: rename: check backing inode being equal
If a file is renamed to a hardlink of itself POSIX specifies that rename(2)
should do nothing and return success.

This condition is checked in vfs_rename().  However it won't detect hard
links on overlayfs where these are given separate inodes on the overlayfs
layer.

Overlayfs itself detects this condition and returns success without doing
anything, but then vfs_rename() will proceed as if this was a successful
rename (detach_mounts(), d_move()).

The correct thing to do is to detect this condition before even calling
into overlayfs.  This patch does this by calling vfs_select_inode() to get
the underlying inodes.

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Cc: <stable@vger.kernel.org> # v4.2+
2016-05-10 23:55:43 -04:00
Miklos Szeredi 54d5ca871e vfs: add vfs_select_inode() helper
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Cc: <stable@vger.kernel.org> # v4.2+
2016-05-10 23:55:01 -04:00
Linus Torvalds 44549e8f5e Linux 4.6-rc7 2016-05-08 14:38:32 -07:00
Linus Torvalds 32cf95db22 Char/Misc driver fixes for 4.6-rc7
Here are 3 small fixes for some driver problems that were reported.
 Full details in the shortlog below.
 
 All of these have been in linux-next with no reported issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2
 
 iEYEABECAAYFAlcuKUQACgkQMUfUDdst+yk8qgCguPDODcYzOWiH1+RtIXTH5kXG
 /1EAoIx7+uhzX9pt9E635NsrcNJqefWx
 =9Uhc
 -----END PGP SIGNATURE-----

Merge tag 'char-misc-4.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

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

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

* tag 'char-misc-4.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  nvmem: mxs-ocotp: fix buffer overflow in read
  Drivers: hv: vmbus: Fix signaling logic in hv_need_to_signal_on_read()
  misc: mic: Fix for double fetch security bug in VOP driver
2016-05-07 10:53:32 -07:00
Linus Torvalds 630aac5ab6 Staging/IIO driver fixes for 4.6-rc7
Well, it's really just IIO drivers here, some small fixes that resolve
 some "crash on boot" errors that have shown up in the -rc series, and
 other bugfixes that are required.
 
 All have been in linux-next with no reported problems.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2
 
 iEYEABECAAYFAlcuKBgACgkQMUfUDdst+ynALgCgh4QWOZ/vnLQvx/r1ZOIW1xqm
 QdAAn1eJ1/KzwbM+WmmfXu1dKykfs7YS
 =tGM3
 -----END PGP SIGNATURE-----

Merge tag 'staging-4.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

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

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

* tag 'staging-4.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
  iio: imu: mpu6050: Fix name/chip_id when using ACPI
  iio: imu: mpu6050: fix possible NULL dereferences
  iio:adc:at91-sama5d2: Repair crash on module removal
  iio: ak8975: fix maybe-uninitialized warning
  iio: ak8975: Fix NULL pointer exception on early interrupt
2016-05-07 10:50:48 -07:00
Linus Torvalds 3f8f0cf2ed USB fixes for 4.6-rc7
Here are some last-remaining fixes for USB drivers to resolve issues
 that have shown up in testing.  And 2 new device ids as well.
 
 All of these have been in linux-next with no reported issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2
 
 iEYEABECAAYFAlcuJqEACgkQMUfUDdst+yl07wCeMMXyn3ZgOgpxiAAFUjBiHN5P
 86gAn2Kh/eihIFYwPRrHypbE67RO+yTx
 =QYaR
 -----END PGP SIGNATURE-----

Merge tag 'usb-4.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

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

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

* tag 'usb-4.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  Revert "USB / PM: Allow USB devices to remain runtime-suspended when sleeping"
  usb: musb: jz4740: fix error check of usb_get_phy()
  Revert "usb: musb: musb_host: Enable HCD_BH flag to handle urb return in bottom half"
  usb: musb: gadget: nuke endpoint before setting its descriptor to NULL
  USB: serial: cp210x: add Straizona Focusers device ids
  USB: serial: cp210x: add ID for Link ECU
2016-05-07 10:47:03 -07:00
Linus Torvalds 9125aeb3e2 Merge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm
Pull ARM fixes from Russell King:
 "These are a number of updates to fix a few problems found in the ARM
  nommu code over the last couple of years, caused mostly by changes on
  the mmu side"

* 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: 8573/1: domain: move {set,get}_domain under config guard
  ARM: 8572/1: nommu: change memory reserve for the vectors
  ARM: 8571/1: nommu: fix PMSAv7 setup
2016-05-07 08:27:35 -07:00
Linus Torvalds 67601c3b64 media fixes for v4.6-rc7
-----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABAgAGBQJXLdt0AAoJEAhfPr2O5OEVMzYQAKGk2BqfPQO5+vV0S4FHG/5I
 kBe2y5MhedikMTm3yp77jLqkUPO3zbuZ3BZW4IJbOhl0STYzT51C573Z+6utfSvr
 b6zMvTfXPIe+iFoqO7fsO/zJuJtlFjm4wzO/S5v5mYrks5z3oLwN7v34QtkKfVM1
 3pfwlXyIthE4Cff0j18SsyUpkjN3sF8lDJOFSjH2C1a9yfUpOAX9iPXax88S9fuc
 cNyp6msrsa8qoYW4Z3IcMKzw7gCWXberaLYPv0Jy9zmk5OKLgJoUS3oKo0B29HSu
 xxIhW60uZDv9+nQF623EUdIF7hRzSjTnnKK+qQFD+JX8c5qmIoPrQQW90WefFO2e
 suBRvmg0xC6j0rQRjGbSdTm6mFjPeO6YHWcO3JpoQ7FvdYlRIq29H0PRYzr4bADD
 IiJlxqMrBRX2l5T1fKw/Fx9fag4asl/svdYjw7fVYdrn9Q6dRDR/lj4dUsC7n0+J
 lgKs9Lvs4ZE0n0TlAQEkgeL3Xe2RNuiO/90m3WEMFvT1YFX0BxW/w2RcCuAilt78
 z24ljeeBrQWaR8wnsENoE+emwr1aa5hkTl5qgudiXBWO7obUiCbYkaFpFGU1DfEe
 VE1JHBG82vbqTyYbLjLVpuLpp61qpXY5WngYjzG9gMetBAOaWkiPSIfq69h5c2JK
 K+JEoMfJdrIpsqJ7k4E+
 =0D5s
 -----END PGP SIGNATURE-----

Merge tag 'media/v4.6-5' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media

Pull media fixes from Mauro Carvalho Chehab:

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

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

* tag 'media/v4.6-5' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
  [media] media-device: fix builds when USB or PCI is compiled as module
  [media] media: s3c-camif: fix deadlock on driver probe()
  [media] media: exynos4-is: fix deadlock on driver probe
2016-05-07 08:17:45 -07:00
Linus Torvalds 35cd3f4563 Merge branch 'for-4.6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata
Pull libata fixes from Tejun Heo:
 "An ahci driver addition and updates to ahci port enable handling for
  some platform devices"

* 'for-4.6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
  ata: add AMD Seattle platform driver
  ARM: dts: apq8064: add ahci ports-implemented mask
  ata: ahci-platform: Add ports-implemented DT bindings.
  libahci: save port map for forced port map
2016-05-07 08:13:42 -07:00
Linus Torvalds b4184cbff3 Late 4.6-rc fixes
- Fix for max sector calculation in iSER
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABAgAGBQJXK3h4AAoJELgmozMOVy/doWMQAJ/O1kMh9ojnlLaFRjm889aV
 vNT/NTV0ilmbjvzgmhzYpbPOYf42hCHOZlI1vCCdTK0FafVlUh67m7oUCdW3OSm2
 b9OVtYsvqk/R6rlSqh8anmqwgAIv1OvmdQ26PBhOpkuokDgZArP4jaH06Tacqjws
 2cxZVuX8SA3f97tquOm1Shj0gqdA8dk9O+/6L3KzV2B6KUaBdYdb3ywvBQAVjIde
 qQJ4WiFl6QEBEQ18Seo6//cTiOez4bNYbR5inkgohciFfO8UIVDZDRLIXBQCE2Ca
 0QyoQ0OmAlSlAzXRCjTe+ZxAXjnmR/ZqRPgQAu9M4klMJF9ri+7U8uwerLQcMQQZ
 D1cQWx14P5BKMGKQ6kOh85+cQsn0qxOHNDRmEC7RIFda3rpsnEhtllg5+A94ZGMz
 FFOZ8uHYuOGxU2cbQUv9bjxDe2ukMjvYRdGbTTnWv+Ifi9S4fuIV1yw6erZ2XTRd
 BZWCMmmjvJWCfiZ1k1ZT1HtHW+dEvilcsFWbkZ4aGjFVF9sFvuWbGynWU57E9JWs
 2SC1CNp40OFCneqyPIVVFOu2kGNvQEp9UNy4espDT4hUP9J9trwkZdZLyE8HFufB
 Rj4BXUpzMt0+RLWQC3tGRDQDtgO4b6SJG1QtwTj7Jb/ttuzCYaVQ463KNo1KeS2y
 7Li0afdLKQ2LslVlKJK1
 =sU6v
 -----END PGP SIGNATURE-----

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma

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

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma:
  IB/iser: Fix max_sectors calculation
2016-05-07 08:10:08 -07:00
Linus Torvalds 0783783104 Merge branch 'for-linus' of git://git.kernel.dk/linux-block
Pull writeback fix from Jens Axboe:
 "Just a single fix for domain aware writeback, fixing a regression that
  can cause balance_dirty_pages() to keep looping while not getting any
  work done"

* 'for-linus' of git://git.kernel.dk/linux-block:
  writeback: Fix performance regression in wb_over_bg_thresh()
2016-05-06 13:08:35 -07:00
Linus Torvalds 3f86ba5d0c Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
 "This contains two fixes: a boot fix for older SGI/UV systems, and an
  APIC calibration fix"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/tsc: Read all ratio bits from MSR_PLATFORM_INFO
  x86/platform/UV: Bring back the call to map_low_mmrs in uv_system_init
2016-05-06 12:59:27 -07:00
Linus Torvalds 01ec716761 Power management and ACPI fixes for v4.6-rc7
- Fix for a recent regression in the intel_pstate driver causing
    it to fail to restore the HWP (HW-managed P-states) configuration
    of the boot CPU after suspend-to-RAM (Rafael Wysocki).
 
  - Fix for two recent regressions in the intel_pstate driver, one
    that can trigger a divide by zero if the driver is accessed via
    sysfs before it manages to take the first sample and one causing
    it to fail to update a structure field used in a trace point, so
    the information coming from it is less useful (Rafael Wysocki).
 
  - Fix for a problem in the sti-cpufreq driver introduced during
    the 4.5 cycle that causes it to break CPU PM in multi-platform
    kernels by registering cpufreq-dt (which subsequently doesn't
    work) unconditionally and preventing the driver that would
    actually work from registering (Sudeep Holla).
 
  - Stable-candidate fix for an ARM64 cpuidle issue causing idle
    state usage counters to be incorrectly updated for idle states
    that were not entered due to errors (James Morse).
 
  - Fix for a recently introduced issue in the OPP (Operating
    Performance Points) framework causing it to print bogus error
    messages for missing optional regulators (Viresh Kumar).
 
  - Fix for a recently introduced issue in the generic device
    properties framework that may cause it to attempt to dereferece
    and invalid pointer in some cases (Heikki Krogerus).
 
  - Fix for a deadlock in the ACPICA core that may be triggered
    by device (eg. Thunderbolt) hotplug (Prarit Bhargava).
 
 /
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2.0.22 (GNU/Linux)
 
 iQIcBAABCAAGBQJXLIwPAAoJEILEb/54YlRxT+wP/ROEo/r5IaRZ2k8cphWjsiKk
 k9eDuWBL2KZ29ikghXs/vVY2fMbtQkaDT5h57imsUEKoEzI3MlYA3OkQyffFOcsY
 dz/9EnG6K9Efi6VS1dS1tNCgl45aIeHLCqlVPOBCZ9TwSoAERdNJGqItJdS2YKIA
 +C1LGrWl4UiJ95AOof9PHfKfnWxrnRbpIsB2PbxD0Swe5vfskrHoRWGOAMLJIwpF
 7NvEJ15fryDIvlMR/ggNrg2L2piOu1fJl2kVZYWZTb/u+qAO3utxTQN4y++zTSNb
 LAN78Hq/nJu156SSioO9fLa0wPaU+k2OChfWXtlMsTDK+L5EQz4G3pJwi5FA8QTD
 nfeZNC9VgqfP4LtqWw05h/AOw4A0XUeuwB8Edbc+WG5twzULqDhS57jew4A4xX8d
 jOsvK5syygnR+/rExWc0NWSmCH0g1u6mCUWXQuocfSb/oOEcUGq5RSixRNRfmJUq
 9XNF3hbp7W/Vnp9GWT30Md+CenrEtQXFK8ZQtg0ckBl+b5bEqKYs6FXGqCkUmjZy
 Qgt5sqxgdLWtslS3vSu1/mdryeaLmXNO6c6wueSPMmLyYODEoIHSSka9N9O0Inwv
 d106p7gUy3/ETamC3lbnyHkUrAru74Qh8rErKpqaRLkKfcIq7YCB073fxbqlamzz
 X4n8a1H37LefLqmKwIbF
 =pU+A
 -----END PGP SIGNATURE-----

Merge tag 'pm+acpi-4.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

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

  Specifics:

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

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

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

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

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

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

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

* tag 'pm+acpi-4.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  PM / OPP: Remove useless check
  ACPICA: Dispatcher: Update thread ID for recursive method calls
  intel_pstate: Fix intel_pstate_get()
  cpufreq: intel_pstate: Fix HWP on boot CPU after system resume
  cpufreq: st: enable selective initialization based on the platform
  ARM: cpuidle: Pass on arm_cpuidle_suspend()'s return value
  device property: Avoid potential dereferences of invalid pointers
2016-05-06 11:58:45 -07:00
Linus Torvalds 17d25a337b Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fix from Ingo Molnar:
 "This contains a single fix that fixes a nohz tick stopping bug when
  mixed-poliocy SCHED_FIFO and SCHED_RR tasks are present on a runqueue"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  nohz/full, sched/rt: Fix missed tick-reenabling bug in sched_can_stop_tick()
2016-05-06 11:53:27 -07:00
Linus Torvalds 18fb92c30c Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar:
 "This tree contains two fixes: new Intel CPU model numbers and an
  AMD/iommu uncore PMU driver fix"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86/amd/iommu: Do not register a task ctx for uncore like PMUs
  perf/x86: Add model numbers for Kabylake CPUs
2016-05-06 11:40:24 -07:00
Linus Torvalds cade818463 Merge branch 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull EFI fixes from Ingo Molnar:
 "This tree contains three fixes: a console spam fix, a file pattern fix
  and a sysfb_efi fix for a bug that triggered on older ThinkPads"

* 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/sysfb_efi: Fix valid BAR address range check
  x86/efi-bgrt: Switch all pr_err() to pr_notice() for invalid BGRT
  MAINTAINERS: Remove asterisk from EFI directory names
2016-05-06 11:33:02 -07:00
Linus Torvalds 83a395d332 Merge branch 'parisc-4.6-5' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
Pull parisc fix from Helge Deller:
 "Patch from Dmitry V Levin to fix a kernel crash when a straced process
  calls the (invalid) syscall which is equal to value of __NR_Linux_syscalls"

* 'parisc-4.6-5' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: fix a bug when syscall number of tracee is __NR_Linux_syscalls
2016-05-06 11:27:05 -07:00
Linus Torvalds dd287690b0 ARC fixes for 4.6-rc7
- Fix for PTE truncation in PAE40 builds
  - Fix for big endian IO accessors lacking IO barrier
  - Allow HIGHMEM to work with low physical addresses
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABAgAGBQJXLIohAAoJEGnX8d3iisJeXLcQALwte9aeySA+r1X7S/OkW6uw
 kU+kAYqjxnjgIy4Zy+BmQwFMTxJpvb7NV9ZHvLWNFXWlyZEBAbDQz8LgLpuAekx4
 nbyk5KvvSKKkWP19T0/pCr19mQC06qKWzEr91zZ/lqxDwZKR6GIlbnlT7ugB25gH
 9dKSUww17YsS2nVvlq0d0nbs+rFP/4fE9O8RW096bo6zOi5j6dzP7jJy6AdG1Czq
 +UQUcFdkIkJLwoOaamur49azNmpmdR8goOgz6kzj8NK2J/cQx5698YTArR9c2xSw
 86TAr1yw4gnz9M+vinNrfY+mxs+n3YZTG//tVbuhL5nvGKDM6T1lkuyJPbiJHHDQ
 NxULX60NYOP32Xl5/fnCGoIDL30rLwmCgn1T2uZONVnx9e0Ai51TJE3T7Qlux/3X
 t/BlqzWQRIWOfR6jAtS+Gi3KM4fRwRNAeU4ed/kUqyXQSoRUNXOPof35+h7O7dSO
 dvrUnhBtBXsHCaDRRLfxjDzNqV9T2aIr/zZLM3rkBw79SPVIBHdV1hjLt0IxpMrn
 ttwhjVQXahD+MUGxLqS7efwdyHzjtOB/D1wW/6Fg6n/ircvTcIziV4pThHCFTxs9
 zWgmGgtD2XWSj0fhNXqe+AyjW1a6ZiH3GjMfV9cBbAsydFmUDCws8kWMTQOUSRNw
 1l/L0DIsBZzGlnredJzJ
 =bf8d
 -----END PGP SIGNATURE-----

Merge tag 'arc-4.6-rc7-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc

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

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

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

* tag 'arc-4.6-rc7-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
  ARC: support HIGHMEM even without PAE40
  ARC: Fix PAE40 boot failures due to PTE truncation
  ARC: Add missing io barriers to io{read,write}{16,32}be()
2016-05-06 11:14:38 -07:00
Linus Torvalds 4883d11e06 powerpc fixes for 4.6 #4
- Fix bad inline asm constraint in create_zero_mask() from Anton Blanchard
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABAgAGBQJXLEx6AAoJEFHr6jzI4aWAQskQAL9rtQtxhJQnCE97832iIgWn
 +YEef53mSTX7CEpoQqGY/2PUAOeQ8MPteewNaO5spZC2Vv34bXuHtv0q1uhiVJ6K
 Q0t1LSbm60rv9BIuO8rDSJmSGnSljI1bczd0WVsTHuYLyFrVPtRZaDBJT9Bh2JTQ
 +K/GE3o4R1X5pnUlZ4UqCcN7KwLrqHkQrmEcsSdUQMJ4s4jZaxS1KP9Kzq/M+mjy
 L9K4SyXneMyCgiUCIdu3hN5A7Vb+2NauGmCP/eV6x4+M/Bq5JC4vNDUcCKE0IBLF
 bNP5nvMKBBZOHlwxVWo9d2UWPeyEoIz4sKiZ26AE+urCYGhRMHb4M/Mh0qUbru13
 CwZ1BwmZnyYs4pY8INbZJ+TvLcFgROfxxeUlT0KHStlnOrIbmgeKPWI/nymsL6n8
 uHgSc8SnhskNW0n4NhWKVPD5iKqeWV2spFr5aTQ2tLDi7s2rT2oZjl5/GvKSIt+o
 NlmkL2LpbIOftRQ2j+EhHPq/acV8+d20yjN8Zul0tSTNuFeSk6rXyXhEiYXfU+Ao
 lPjkheNJZ9Oq0MAW0dvqWK4DrK31lhnZYcauO84cSA39sGa9BhHFe1E9XXMDSDwf
 YFs7ihMcbap1pejcf7waJJ5axCwN1SgxUGH1lCuGmOAypftbQT5TpB7m52ctAS5J
 vbsUZ8Z0W6OwsfSiKc/G
 =IkNh
 -----END PGP SIGNATURE-----

Merge tag 'powerpc-4.6-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

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

* tag 'powerpc-4.6-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc: Fix bad inline asm constraint in create_zero_mask()
2016-05-06 11:05:07 -07:00
Linus Torvalds 659a182327 Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Pull drm fixes from Dave Airlie:
 "Fixes for i915, amdgpu/radeon and imx.

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

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

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  gpu: ipu-v3: Fix imx-ipuv3-crtc module autoloading
  drm/amdgpu: make sure vertical front porch is at least 1
  drm/radeon: make sure vertical front porch is at least 1
  drm/amdgpu: set metadata pointer to NULL after freeing.
  drm/i915: Make RPS EI/thresholds multiple of 25 on SNB-BDW
  drm/i915: Fake HDMI live status
  drm/i915: Fix eDP low vswing for Broadwell
  drm/i915/ddi: Fix eDP VDD handling during booting and suspend/resume
  drm/i915: Fix system resume if PCI device remained enabled
  drm/i915: Avoid stalling on pending flips for legacy cursor updates
2016-05-06 10:59:53 -07:00
Dmitry V. Levin f0b22d1bb2 parisc: fix a bug when syscall number of tracee is __NR_Linux_syscalls
Do not load one entry beyond the end of the syscall table when the
syscall number of a traced process equals to __NR_Linux_syscalls.
Similar bug with regular processes was fixed by commit 3bb457af4f
("[PARISC] Fix bug when syscall nr is __NR_Linux_syscalls").

This bug was found by strace test suite.

Cc: stable@vger.kernel.org
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
Acked-by: Helge Deller <deller@gmx.de>
Signed-off-by: Helge Deller <deller@gmx.de>
2016-05-06 15:09:07 +02:00
Rafael J. Wysocki 5f2f88e330 Merge branches 'pm-opp-fixes', 'pm-cpufreq-fixes' and 'pm-cpuidle-fixes'
* pm-opp-fixes:
  PM / OPP: Remove useless check

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

* pm-cpuidle-fixes:
  ARM: cpuidle: Pass on arm_cpuidle_suspend()'s return value
2016-05-06 13:16:22 +02:00
Rafael J. Wysocki 7c21b38ca9 Merge branches 'acpica-fixes' and 'device-properties-fixes'
* acpica-fixes:
  ACPICA: Dispatcher: Update thread ID for recursive method calls

* device-properties-fixes:
  device property: Avoid potential dereferences of invalid pointers
2016-05-06 13:15:52 +02:00
Chen Yu 886123fb3a x86/tsc: Read all ratio bits from MSR_PLATFORM_INFO
Currently we read the tsc radio: ratio = (MSR_PLATFORM_INFO >> 8) & 0x1f;

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

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

Fix this problem by masking 0xff instead.

[ tglx: Massaged changelog ]

Fixes: 7da7c15613 "x86, tsc: Add static (MSR) TSC calibration on Intel Atom SoCs"
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: stable@vger.kernel.org
Cc: Bin Gao <bin.gao@intel.com>
Cc: Len Brown <lenb@kernel.org>
Link: http://lkml.kernel.org/r/1462505619-5516-1-git-send-email-yu.c.chen@intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-05-06 11:50:50 +02:00
Linus Torvalds 9caa7e7848 Merge branch 'akpm' (patches from Andrew)
Merge fixes from Andrew Morton:
 "14 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  byteswap: try to avoid __builtin_constant_p gcc bug
  lib/stackdepot: avoid to return 0 handle
  mm: fix kcompactd hang during memory offlining
  modpost: fix module autoloading for OF devices with generic compatible property
  proc: prevent accessing /proc/<PID>/environ until it's ready
  mm/zswap: provide unique zpool name
  mm: thp: kvm: fix memory corruption in KVM with THP enabled
  MAINTAINERS: fix Rajendra Nayak's address
  mm, cma: prevent nr_isolated_* counters from going negative
  mm: update min_free_kbytes from khugepaged after core initialization
  huge pagecache: mmap_sem is unlocked when truncation splits pmd
  rapidio/mport_cdev: fix uapi type definitions
  mm: memcontrol: let v2 cgroups follow changes in system swappiness
  mm: thp: correct split_huge_pages file permission
2016-05-05 20:48:35 -07:00
Linus Torvalds 43a3e837e2 mailmap: add John Paul Adrian Glaubitz
Apparently patchwork ended up truncating the full name.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-05 20:07:14 -07:00
Linus Torvalds 7270a3f761 Merge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull libnvdimm fixes from Dan Williams:

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

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

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

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

* 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  nfit: fix translation of command status results
  libnvdimm, pfn: fix memmap reservation sizing
2016-05-05 18:10:01 -07:00
Arnd Bergmann 7322dd755e byteswap: try to avoid __builtin_constant_p gcc bug
This is another attempt to avoid a regression in wwn_to_u64() after that
started using get_unaligned_be64(), which in turn ran into a bug on
gcc-4.9 through 6.1.

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

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

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

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

[arnd@arndb.de: fix older gcc warnings]
  (http://lkml.kernel.org/r/12243652.bxSxEgjgfk@wuerfel)
Link: https://lkml.org/lkml/headers/2016/4/12/1103
Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66122
Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70232
Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70646
Fixes: e3bde9568d ("include/linux/unaligned: force inlining of byteswap operations")
Fixes: ef3fb2422f ("scsi: fc: use get/put_unaligned64 for wwn access")
Link: http://lkml.kernel.org/r/1780465.XdtPJpi8Tt@wuerfel
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Josh Poimboeuf <jpoimboe@redhat.com>
Tested-by: Josh Poimboeuf <jpoimboe@redhat.com> # on gcc-5.3
Tested-by: Quinn Tran <quinn.tran@qlogic.com>
Cc: Martin Jambor <mjambor@suse.cz>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: James Bottomley <James.Bottomley@hansenpartnership.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Thomas Graf <tgraf@suug.ch>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Himanshu Madhani <himanshu.madhani@qlogic.com>
Cc: Jan Hubicka <hubicka@ucw.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-05 17:38:53 -07:00
Joonsoo Kim 7c31190bcf lib/stackdepot: avoid to return 0 handle
Recently, we allow to save the stacktrace whose hashed value is 0.  It
causes the problem that stackdepot could return 0 even if in success.
User of stackdepot cannot distinguish whether it is success or not so we
need to solve this problem.  In this patch, 1 bit are added to handle
and make valid handle none 0 by setting this bit.  After that, valid
handle will not be 0 and 0 handle will represent failure correctly.

Fixes: 33334e2576 ("lib/stackdepot.c: allow the stack trace hash to be zero")
Link: http://lkml.kernel.org/r/1462252403-1106-1-git-send-email-iamjoonsoo.kim@lge.com
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-05 17:38:53 -07:00
Vlastimil Babka 172400c69c mm: fix kcompactd hang during memory offlining
Assume memory47 is the last online block left in node1.  This will hang:

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

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

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

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

Fixes: 698b1b306 ("mm, compaction: introduce kcompactd").
Reported-by: Reza Arbab <arbab@linux.vnet.ibm.com>
Tested-by: Reza Arbab <arbab@linux.vnet.ibm.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: David Rientjes <rientjes@google.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-05 17:38:53 -07:00
Philipp Zabel acbef7b766 modpost: fix module autoloading for OF devices with generic compatible property
Since the wildcard at the end of OF module aliases is gone, autoloading
of modules that don't match a device's last (most generic) compatible
value fails.

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

This results in the device compatible
"of:NvpuT<NULL>Cfsl,imx6q-vpuCcnm,coda960" not matching the module alias
"of:N*T*Cfsl,imx6q-vpu" anymore, whereas before commit 2f632369ab
("modpost: don't add a trailing wildcard for OF module aliases") it
matched the module alias "of:N*T*Cfsl,imx6q-vpu*".

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

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

Fixes: 2f632369ab ("modpost: don't add a trailing wildcard for OF module aliases")
Link: http://lkml.kernel.org/r/1462203339-15340-1-git-send-email-p.zabel@pengutronix.de
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Cc: Javier Martinez Canillas <javier@osg.samsung.com>
Cc: Brian Norris <computersforpeace@gmail.com>
Cc: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: <stable@vger.kernel.org>	[4.5+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-05 17:38:53 -07:00
Mathias Krause 8148a73c99 proc: prevent accessing /proc/<PID>/environ until it's ready
If /proc/<PID>/environ gets read before the envp[] array is fully set up
in create_{aout,elf,elf_fdpic,flat}_tables(), we might end up trying to
read more bytes than are actually written, as env_start will already be
set but env_end will still be zero, making the range calculation
underflow, allowing to read beyond the end of what has been written.

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

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

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

Fixes: https://forums.grsecurity.net/viewtopic.php?f=3&t=4363
Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=116461
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Cc: Emese Revfy <re.emese@gmail.com>
Cc: Pax Team <pageexec@freemail.hu>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Mateusz Guzik <mguzik@redhat.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Jarod Wilson <jarod@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-05 17:38:53 -07:00
Dan Streetman 32a4e16903 mm/zswap: provide unique zpool name
Instead of using "zswap" as the name for all zpools created, add an
atomic counter and use "zswap%x" with the counter number for each zpool
created, to provide a unique name for each new zpool.

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

Fixes: f1c54846ee ("zswap: dynamic pool creation")
Signed-off-by: Dan Streetman <ddstreet@ieee.org>
Reported-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Dan Streetman <dan.streetman@canonical.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-05 17:38:53 -07:00
Andrea Arcangeli 127393fbe5 mm: thp: kvm: fix memory corruption in KVM with THP enabled
After the THP refcounting change, obtaining a compound pages from
get_user_pages() no longer allows us to assume the entire compound page
is immediately mappable from a secondary MMU.

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

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

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

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

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

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>
Cc: "Li, Liang Z" <liang.z.li@intel.com>
Cc: Amit Shah <amit.shah@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-05 17:38:53 -07:00
Eric Engestrom ff2de822c9 MAINTAINERS: fix Rajendra Nayak's address
Signed-off-by: Eric Engestrom <eric.engestrom@imgtec.com>
Cc: Rajendra Nayak <rnayak@codeaurora.org>
Cc: Afzal Mohammed <afzal.mohd.ma@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-05 17:38:53 -07:00
Hugh Dickins 14af4a5e9b mm, cma: prevent nr_isolated_* counters from going negative
/proc/sys/vm/stat_refresh warns nr_isolated_anon and nr_isolated_file go
increasingly negative under compaction: which would add delay when
should be none, or no delay when should delay.  The bug in compaction
was due to a recent mmotm patch, but much older instance of the bug was
also noticed in isolate_migratepages_range() which is used for CMA and
gigantic hugepage allocations.

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

Fixes: edc2ca6124 ("mm, compaction: move pageblock checks up from isolate_migratepages_range()")
[vbabka@suse.cz: expanded the changelog]
Signed-off-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-05 17:38:53 -07:00
Jason Baron bc22af74f2 mm: update min_free_kbytes from khugepaged after core initialization
Khugepaged attempts to raise min_free_kbytes if its set too low.
However, on boot khugepaged sets min_free_kbytes first from
subsys_initcall(), and then the mm 'core' over-rides min_free_kbytes
after from init_per_zone_wmark_min(), via a module_init() call.

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

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

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

Fixes: 79553da293 ("thp: cleanup khugepaged startup")
Signed-off-by: Jason Baron <jbaron@akamai.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-05 17:38:53 -07:00
Hugh Dickins 684283988f huge pagecache: mmap_sem is unlocked when truncation splits pmd
zap_pmd_range()'s CONFIG_DEBUG_VM !rwsem_is_locked(&mmap_sem) BUG() will
be invalid with huge pagecache, in whatever way it is implemented:
truncation of a hugely-mapped file to an unhugely-aligned size would
easily hit it.

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

We could complicate the test, to check i_mmap_rwsem also when there's a
vm_file; but my inclination was to make zap_pmd_range() more readable by
simply deleting this check.  A search has shown no report of the issue
in the years since commit e0897d75f0 ("mm, thp: print useful
information when mmap_sem is unlocked in zap_pmd_range") expanded it
from VM_BUG_ON() - though I cannot point to what commit I would say then
fixed the issue.

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

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

Signed-off-by: Hugh Dickins <hughd@google.com>
Tested-by: Matthew Wilcox <willy@linux.intel.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Andres Lagar-Cavilla <andreslc@google.com>
Cc: Yang Shi <yang.shi@linaro.org>
Cc: Ning Qu <quning@gmail.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Andres Lagar-Cavilla <andreslc@google.com>
Cc: Konstantin Khlebnikov <koct9i@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-05 17:38:53 -07:00
Alexandre Bounine 4e1016dac1 rapidio/mport_cdev: fix uapi type definitions
Fix problems in uapi definitions reported by Gabriel Laskar: (see
https://lkml.org/lkml/2016/4/5/205 for details)

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

Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Reported-by: Gabriel Laskar <gabriel@lse.epita.fr>
Tested-by: Barry Wood <barry.wood@idt.com>
Cc: Gabriel Laskar <gabriel@lse.epita.fr>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Aurelien Jacquiot <a-jacquiot@ti.com>
Cc: Andre van Herk <andre.van.herk@prodrive-technologies.com>
Cc: Barry Wood <barry.wood@idt.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-05 17:38:53 -07:00
Johannes Weiner 4550c4e157 mm: memcontrol: let v2 cgroups follow changes in system swappiness
Cgroup2 currently doesn't have a per-cgroup swappiness setting.  We
might want to add one later - that's a different discussion - but until
we do, the cgroups should always follow the system setting.  Otherwise
it will be unchangeably set to whatever the ancestor inherited from the
system setting at the time of cgroup creation.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Vladimir Davydov <vdavydov@virtuozzo.com>
Cc: <stable@vger.kernel.org>	[4.5]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-05 17:38:53 -07:00
Yang Shi 145bdaa150 mm: thp: correct split_huge_pages file permission
split_huge_pages doesn't support get method at all, so the read
permission sounds confusing, change the permission to write only.

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

Signed-off-by: Yang Shi <yang.shi@linaro.org>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-05 17:38:53 -07:00
Linus Torvalds 85f397a97a asm-generic syscall fix for 4.6-rc
My last pull request for asm-generic had just one patch that added two
 new system calls to asm/unistd.h, but unfortunately it turned out
 to be wrong, pointing arch/tile compat mode at the native handlers
 rather than the compat ones.
 
 This was spotted by Yury Norov, who is working on ILP32 mode
 for arch/arm64, which would have the same problem when merged.
 This fixes the table to use the correct compat syscalls, like
 the other 64-bit architectures do.
 
 I'll try to find the time to come up with a solution that
 prevents this problem from happening again, by allowing all
 future system calls to just get added in a single file
 for use by all architectures.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIVAwUAVyuiZWCrR//JCVInAQLgcxAAnDsLXnepV7gYfkF3MjoN3GVR2BzehI+a
 f7YWTAoA/7MA9DJsSeSlqz0F0/M0TnVM7Yg3VkG4RvxhgSpHCnpol9/CEXuG4TLe
 1Yn3CqNyMfNv9G3WfwWwSu4NeRWUeZAYbNkmWovhx3uWzmk1I+BnShd+IWmzDo0v
 +KC9tkiq7NYlManpdUR+e80Eoougqkrryk6VAdNcgmVvVSCEhSA3VVxiTx26kcdd
 mI7oz0gcJxlCwMZvNfRFFtrEAN9XGwV8bwkO5gYD/1nQSbzXcGLkmFpJmw8eCIX7
 oM5gRs46tcKAEUA9fGVG58drrn0itwKqQO1LlUAhp+fsXU96c9rcgvZfY4Twehhk
 lGVIGPfRUJFOtXtVICofR0DPBkNvZB+EVTPV12gZlPOQKzSPHefEzQMkmUemZO13
 Pv1lB8EeKeKlXsC9cSfKyNgBUNAkV35gV1s6wg/MrZo4Asx5/TlqO85n2wU0fspg
 d8yb866F+guz3OvU+RPyJpZL4sZ6tlg0/4TpBpDJetUwxYZNo4c1KpdwMFr64AFI
 Xh3wckbIBfLSUmB4ex6GCchqDlhla4QMA8Vl/ij/bfLMR6SwQEvfrtGegCluJsVX
 LRWV2arusSJTgcdCxa+chVnXjd6xwet8wPgahpOpTKtkJ9B7fnTFheMY+RRIV5Bb
 V7h/3AEbkvs=
 =yaH0
 -----END PGP SIGNATURE-----

Merge tag 'asm-generic-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

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

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

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

* tag 'asm-generic-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
  asm-generic: use compat version for preadv2 and pwritev2
2016-05-05 15:40:38 -07:00
Greg Kroah-Hartman 2b86c4a843 Fourth set of IIO fixes for the 4.6 cycle.
This last minute set is concerned with a regression in the mpu6050 driver.
 The regression causes a null pointer dereference on any ACPI device
 that has one of these present such as the ASUS T100TA Baytrail/T.
 
 The issue was known but thought (i.e. missunderstood by me)
 to only be a possible with no reports, so was routed via the normal merge
 window.  Turns out this was wrong (thanks to Alan for reporting the crash).
 
 The pull is just for the null dereference fix and a followup fix
 that also stops the reported name of the device being NULL.
 
 * mpu6050
   - Fix a 'possible' NULL dereference introduced as part of splitting the
   driver to allow both i2c and spi to be supported.  The issue affects ACPI
   systems with this device.
   - Fix a follow up issue where the name and chip id both get set to null if
   the device driver instance is instantiated from ACPI tables.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2
 
 iQIcBAABCAAGBQJXK50kAAoJEFSFNJnE9BaIP1MP/j3t1WfFkpbuoPlrsUOiYxd1
 2VM9iNGZoLQa06p4WWkBv611NCht4yoOnvK9i8v3QM775xekmZQsnQBiCfm2eWHI
 cL19hCfQnCNcoJxQIUnGrO0xE7AYRxtgvYqmLljOLjKI/q23DxoPshadveLbEHhS
 zxo9hmDI7V8hxapyo15G3JZMSBWTz+d4yJn83d95GSEfdrRExJ66Ta7+eM62WR/M
 4wiPEWtr5nL39orM0wY7lcGyV7KbG+csHSvXLjPq4tRV+D7kk9O916LWsWKNfcU3
 3QiM0RYBdZIHZlpsTZH32+Zygt7efg6/BzRp/sXs/+CLaZw3mroeeQ8hjUaEnzac
 xiVtfc2SOUaSfWw6NO6DeyIBiHoe3EtcXBE5i0y6IjabhP3uUhQGZhWQGb8sinQl
 w6vvtHwS9/5hz6WN2qdkOUWVyThEaR1j7xd6dNA062pAjErZvwJ/zK9Z+CLojZ/P
 GAy9XS34qJ7ttx6NCvUqfWBXhU/K38UXEc6mPJCdSxMx2Q3J2UMojgTLCHC8/Eun
 H+m6cBXL58obGHZS7XcLT2W7u5mAAvNFg1T2bnpCcf3vLWGbpjXI55laATWw72ob
 m/LeYEfLO37Bbxe4XPU992zb2U6CrL8sJ/33pYJVQCnobenRDR9NmTn5IeHLKl5K
 lf1rwmtzTr1KNz4NBsP3
 =FQCc
 -----END PGP SIGNATURE-----

Merge tag 'iio-fixes-for-4.6d' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-linus

Jonathan writes:

Fourth set of IIO fixes for the 4.6 cycle.

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

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

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

* mpu6050
  - Fix a 'possible' NULL dereference introduced as part of splitting the
  driver to allow both i2c and spi to be supported.  The issue affects ACPI
  systems with this device.
  - Fix a follow up issue where the name and chip id both get set to null if
  the device driver instance is instantiated from ACPI tables.
2016-05-05 15:38:07 -07:00
Linus Torvalds c4781a8df9 Here are a couple last-minute fixes for ARM SoCs. Most of them
are for the OMAP platforms, quoting Tony Lindgren:
 
     Fixes for omaps for v4.6-rc cycle. All dts fixes, mostly
     affecting voltages and pinctrl for various device drivers:
 
     - Regulator minimum voltage fixes for omap5
     - ISP syscon register offset fix for omap3
     - Fix regulator initial modes for n900
     - Fix omap5 pinctrl wkup instance size
 
 The rest are all for different platforms:
 
 - Allwinner:
    Remove incorrect constraints from a dcdc1 regulator
 
 - Alltera SoCFPGA:
   Fix compilation in thumb2 mode
 
 - Samsung exynos:
   Fix a potential oops in the pm-domain error handling
 
 - Davinci:
   Avoid a link error if NVMEM is disabled
 
 - Renesas:
   Do not mark an external uart clock as disabled, to allow
   probing the uarts
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIVAwUAVyud6WCrR//JCVInAQKhXBAAir8+FCYQGLzwFQrCHTRa6zJq0sGUOLss
 DBawxezSxtcz9LYn2s9EI5W7yqs/vtjILNTtV3bNNHZTrn/cE8Jpvo+kjNK096PP
 3m0LS20pbGV/629JXiuf55pWugoXUvQNP4kTcuW8dQzQWWuzv2QfJwtW776Q8rOQ
 ZRvh6uUsCgsc6JCCnZESVAnWQ7VA5YpTpZRhokhogdU0r6VTuHfOf8NPD10kiel+
 jpayjC852MPJtS+1JI/d9vIydsSPHbfS8lkVp0rX7oep/Xjp6C3HGSNH+KkLTjXf
 9q6uVm21Kko24wd3RAFYNFshNmD80j+BQJN+59gx7jUnQsVA+WZkNlKSPD1svf+R
 9Ym+fGVn+UgsU/rSW+hhTYft7ao6Tud+W80QARFgWX6B3E3xF/ExJ9TE07hg0sK7
 b+JZAFoSnEut6yTq5g99/YdvDLfqANPo3f3968bl18rKh15Iso/u177KR3cbMPBw
 rKFXg9fkmjd3g5mUUekYvaEKbb+bEeLaAT+2Cri3diSW7odTzsLQSXELS0UTOWfx
 TLTJSkmgxvABhdZZPQscHBvxwXPGQO8S479GGXG2xcI+tiT7ZDJPZeVm0P99B8WB
 Y2VjTjuc49ZALrzT93nY9nInyjhzI5NsnccG5Khw+qoxlZ3+H+N2tVkhwt6+FNcg
 vl8vcFbj9hM=
 =ymz3
 -----END PGP SIGNATURE-----

Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

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

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

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

  Allwinner:
     Remove incorrect constraints from a dcdc1 regulator

  Alltera SoCFPGA:
     Fix compilation in thumb2 mode

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

  Davinci:
     Avoid a link error if NVMEM is disabled

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

* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  ARM: davinci: only use NVMEM when available
  ARM: SoCFPGA: Fix secondary CPU startup in thumb2 kernel
  ARM: dts: omap5: fix range of permitted wakeup pinmux registers
  ARM: dts: omap3-n900: Specify peripherals LDO regulators initial mode
  ARM: dts: omap3: Fix ISP syscon register offset
  ARM: dts: omap5-cm-t54: fix ldo1_reg and ldo4_reg ranges
  ARM: dts: omap5-board-common: fix ldo1_reg and ldo4_reg ranges
  arm64: dts: r8a7795: Don't disable referenced optional scif clock
  ARM: EXYNOS: Properly skip unitialized parent clock in power domain on
  ARM: dts: sun8i-q8-common: Do not set constraints on dc1sw regulator
2016-05-05 15:31:35 -07:00
Russell King 54176cc680 maintainers: update rmk's email address(es)
Update my email and web addresses in the kernel maintainers file.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-05 15:26:31 -07:00
Howard Cochran 74d3694433 writeback: Fix performance regression in wb_over_bg_thresh()
Commit 947e9762a8 ("writeback: update wb_over_bg_thresh() to use
wb_domain aware operations") unintentionally changed this function's
meaning from "are there more dirty pages than the background writeback
threshold" to "are there more dirty pages than the writeback threshold".
The background writeback threshold is typically half of the writeback
threshold, so this had the effect of raising the number of dirty pages
required to cause a writeback worker to perform background writeout.

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

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

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

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

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

Fixes: 947e9762a8 ("writeback: update wb_over_bg_thresh() to use wb_domain aware operations")
Signed-off-by: Howard Cochran <hcochran@kernelspring.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Cc: <stable@vger.kernel.org> # v4.2+
Tested-by Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
2016-05-05 15:44:55 -06:00
Vladimir Murzin ec953b70f3 ARM: 8573/1: domain: move {set,get}_domain under config guard
Recursive undefined instrcution falut is seen with R-class taking an
exception. The reson for that is __show_regs() tries to get domain
information, but domains is not available on !MMU cores, like R/M
class.

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

Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2016-05-05 19:03:02 +01:00
Jean-Philippe Brucker 5b526bd925 ARM: 8572/1: nommu: change memory reserve for the vectors
Commit 19accfd3 (ARM: move vector stubs) moved the vector stubs in an
additional page above the base vector one. This change wasn't taken into
account by the nommu memreserve.
This patch ensures that the kernel won't overwrite any vector stub on
nommu.

[changed the MPU side too]

Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>
Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2016-05-05 19:03:02 +01:00