Commit Graph

738540 Commits

Author SHA1 Message Date
Nicholas Piggin
f49821ee32 kbuild: rename built-in.o to built-in.a
Incremental linking is gone, so rename built-in.o to built-in.a, which
is the usual extension for archive files.

This patch does two things, first is a simple search/replace:

git grep -l 'built-in\.o' | xargs sed -i 's/built-in\.o/built-in\.a/g'

The second is to invert nesting of nested text manipulations to avoid
filtering built-in.a out from libs-y2:

-libs-y2 := $(filter-out %.a, $(patsubst %/, %/built-in.a, $(libs-y)))
+libs-y2 := $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y)))

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-03-26 02:01:19 +09:00
Nicholas Piggin
6358d6e8b9 kbuild: remove incremental linking option
This removes the old `ld -r` incremental link option, which has not
been selected by any architecture since June 2017.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-03-26 02:01:19 +09:00
Michael Forney
1fe7d2bb24 kbuild: Improve portability of some sed invocations
* Use BREs where EREs aren't necessary.
* Pass -E instead of -r to use EREs. This will be standardized in the
  next POSIX revision[0]. GNU sed supports this since 4.2 (May 2009),
  and busybox since 1.22.0 (Jan 2014).
* Use the [:space:] character class instead of ` \t` in bracket
  expressions. In bracket expressions, POSIX says that <backslash> loses
  its special meaning, so a conforming implementation cannot expand \t
  to <tab>[1].
* In BREs, use interval expressions (\{n,m\}) instead of non-standard
  features like \+ and \?.
* Use a loop instead of -s flag.

There are still plenty of other cases of non-standard sed invocations
(use of ERE features in BREs, in-place editing), but this fixes some
core ones.

[0] http://austingroupbugs.net/view.php?id=528
[1] http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap09.html#tag_09_03_05

Signed-off-by: Michael Forney <forney@google.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-03-26 02:01:18 +09:00
Sami Tolvanen
ae0c553c24 kbuild: add clang-version.sh
Based on gcc-version.sh, clang-version.sh prints out the correct
version of clang.

Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-03-26 02:01:18 +09:00
Linus Torvalds
0c8efd610b Linux 4.16-rc5 2018-03-11 17:25:09 -07:00
Linus Torvalds
ed58d66f60 Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86/pti updates from Thomas Gleixner:
 "Yet another pile of melted spectrum related updates:

   - Drop native vsyscall support finally as it causes more trouble than
     benefit.

   - Make microcode loading more robust. There were a few issues
     especially related to late loading which are now surfacing because
     late loading of the IB* microcodes addressing spectre issues has
     become more widely used.

   - Simplify and robustify the syscall handling in the entry code

   - Prevent kprobes on the entry trampoline code which lead to kernel
     crashes when the probe hits before CR3 is updated

   - Don't check microcode versions when running on hypervisors as they
     are considered as lying anyway.

   - Fix the 32bit objtool build and a coment typo"

* 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/kprobes: Fix kernel crash when probing .entry_trampoline code
  x86/pti: Fix a comment typo
  x86/microcode: Synchronize late microcode loading
  x86/microcode: Request microcode on the BSP
  x86/microcode/intel: Look into the patch cache first
  x86/microcode: Do not upload microcode if CPUs are offline
  x86/microcode/intel: Writeback and invalidate caches before updating microcode
  x86/microcode/intel: Check microcode revision before updating sibling threads
  x86/microcode: Get rid of struct apply_microcode_ctx
  x86/spectre_v2: Don't check microcode versions when running under hypervisors
  x86/vsyscall/64: Drop "native" vsyscalls
  x86/entry/64/compat: Save one instruction in entry_INT80_compat()
  x86/entry: Do not special-case clone(2) in compat entry
  x86/syscalls: Use COMPAT_SYSCALL_DEFINEx() macros for x86-only compat syscalls
  x86/syscalls: Use proper syscall definition for sys_ioperm()
  x86/entry: Remove stale syscall prototype
  x86/syscalls/32: Simplify $entry == $compat entries
  objtool: Fix 32-bit build
2018-03-11 14:59:23 -07:00
Linus Torvalds
1ad5daa653 Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer fix from Thomas Gleixner:
 "Just a single fix which adds a missing Kconfig dependency to avoid
  unmet dependency warnings"

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  clocksource/atmel-st: Add 'depends on HAS_IOMEM' to fix unmet dependency
2018-03-11 14:55:15 -07:00
Linus Torvalds
ebb3762e88 Merge branch 'ras-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull RAS fixes from Thomas Gleixner:
 "Two small fixes for RAS/MCE:

   - Serialize sysfs changes to avoid concurrent modificaiton of
     underlying data

   - Add microcode revision to Machine Check records. This should have
     been there forever, but now with the broken microcode versions in
     the wild it has become important"

* 'ras-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/MCE: Serialize sysfs changes
  x86/MCE: Save microcode revision in machine check records
2018-03-11 14:52:41 -07:00
Linus Torvalds
8ad4424350 Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf updates from Thomas Gleixner:
 "Another set of perf updates:

   - Fix a Skylake Uncore event format declaration

   - Prevent perf pipe mode from crahsing which was caused by a missing
     buffer allocation

   - Make the perf top popup message which tells the user that it uses
     fallback mode on older kernels a debug message.

   - Make perf context rescheduling work correcctly

   - Robustify the jump error drawing in perf browser mode so it does
     not try to create references to NULL initialized offset entries

   - Make trigger_on() robust so it does not enable the trigger before
     everything is set up correctly to handle it

   - Make perf auxtrace respect the --no-itrace option so it does not
     try to queue AUX data for decoding.

   - Prevent having different number of field separators in CVS output
     lines when a counter is not supported.

   - Make the perf kallsyms man page usage behave like it does for all
     other perf commands.

   - Synchronize the kernel headers"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/core: Fix ctx_event_type in ctx_resched()
  perf tools: Fix trigger class trigger_on()
  perf auxtrace: Prevent decoding when --no-itrace
  perf stat: Fix CVS output format for non-supported counters
  tools headers: Sync x86's cpufeatures.h
  tools headers: Sync copy of kvm UAPI headers
  perf record: Fix crash in pipe mode
  perf annotate browser: Be more robust when drawing jump arrows
  perf top: Fix annoying fallback message on older kernels
  perf kallsyms: Fix the usage on the man page
  perf/x86/intel/uncore: Fix Skylake UPI event format
2018-03-11 14:49:49 -07:00
Linus Torvalds
02bf0ef028 Merge branch 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking fix from Thomas Gleixner:
 "rt_mutex_futex_unlock() grew a new irq-off call site, but the function
  assumes that its always called from irq enabled context.

  Use (un)lock_irqsafe() to handle the new call site correctly"

* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  rtmutex: Make rt_mutex_futex_unlock() safe for irq-off callsites
2018-03-11 14:46:54 -07:00
Linus Torvalds
abeb75218a dmaengine fixes for v4.16-rc5
Two small fixes are for this cycle:
 - fix max_chunk_size for rcar-dmac for R-Car Gen3
 - fix clock resource of mv_xor_v2
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABAgAGBQJapUbhAAoJEHwUBw8lI4NHQZcP/iQ2Xwwm7iVzwKdpOXW+Knq3
 +zQQFFJaXzLTybEg9upFxAQqZMuUJ6FE3Pa/X1y3imcYoQIjWWd0/RykvY8Sac6E
 cM5IzM20JuVCnbHwKxmYUsoYWg41l0trhDPEFsHn/ddRu6PCHYfo7vflDhwuBweL
 5gIhoUzIKW34bJhFWaslVvfC9k66IL0rhQAawAQFcd3pKIVx5ED8su17cWAGda5w
 UKC0YEsiNY4MNVb4S9N5d1zxHDsjAnAH3//3gs39+zP04tmWsjRJZSPZ2543SU0X
 Ln5nA7p+Knhz1/iSKyYTMy/ZcInCWY+UYUYJNpBecuViXctc7e6gZg/pjmrGegpM
 sV1wvvGBmBifNYVPVhA2MP5uUJR6jfZIJCBjizUiaQkg4eQlLM5XCsZgheSbgLxY
 3zygh1bo4I465bAwjEZf7Xx541ku5orOrdhMUljWsS44z2VP5EZDsGXHsUx4UhAM
 5DP05HdOlSeWrRF8Ja8eJHrSXz6ICTz3N1oajOHzGgxjE0fRNmrnVOlyb9R61A4s
 a+GddqNm/hnHBo0slv3tZgjVCMzDQmedVjU5b4eSxEjV+vo+SrL7VwGHQrpLlvEo
 6PiXTRlKDvyHiOKJJ+YSw7g70HifDdb6IZRo7HsdzqscjvWc3iK4F8McYjiNzLra
 1+Zo3GEs7tikCWYi1ftQ
 =RhQT
 -----END PGP SIGNATURE-----

Merge tag 'dmaengine-fix-4.16-rc5' of git://git.infradead.org/users/vkoul/slave-dma

Pull dmaengine fixes from Vinod Koul:
 "Two small fixes are for this cycle:

   - fix max_chunk_size for rcar-dmac for R-Car Gen3

   - fix clock resource of mv_xor_v2"

* tag 'dmaengine-fix-4.16-rc5' of git://git.infradead.org/users/vkoul/slave-dma:
  dmaengine: mv_xor_v2: Fix clock resource by adding a register clock
  dmaengine: rcar-dmac: fix max_chunk_size for R-Car Gen3
2018-03-11 13:07:14 -07:00
Linus Torvalds
d43be80a4a This is a single GPIO fix for the v4.16 series affecting the
Renesas driver, and fixes wakeup from external stuff.
 -----BEGIN PGP SIGNATURE-----
 
 iQIcBAABAgAGBQJapPzIAAoJEEEQszewGV1zyzEP/1lpoBdsHoMsLSQ5ya8YXXJo
 mtRTIn9WZ5cRS+RpR4UjRW+TnKcdfOtzEWevzyNoNWcSK1m9sSScOl2MwqP56Lda
 WH4SoLZYClHoUJsZ7v0r+b4WmOWa7IWaqjuNFLL+5w5nVmzpFlZoppqUAqoxi3rb
 Tr9PqI8NXmc9zfUz971/b8A4MmXMA/wXHfoin9uYoWHyyIf6Odszgdp01tMh1/39
 7R9OlHgwXuRF0iPtcmwXINU2WjGerIChDOehZ3u/OCFXlPULtWktyWiqEOvEgour
 XXyLynCLwUn4x5QIXNb0wBGR7R2OxKyk78AddkvA0wKWbixgJ2WSBA6oJl1+Cy4b
 2HQIkRz6b56JUf/7kc2Il+V0NIj4x0iq2JYOOHYcDe9sVdn9pVpfJ50gvkPDTTE8
 zILym6abGSfhq/UXW8YKMGvMez7YasWHHtf1jPK4/4YJthCtWEUbFeK2Bfd4MMxg
 ey1hAz9ZWkCdP8vWr5Znyh5LCu+3gtq24dkSKrDhdnzO+UZxeb7ZYT/kv18YNJSk
 aRpPOGFCZpdV2LeclbgfOLi8OO+xFWC7bM6ZNSVVH7JfJG0SpOWWGt6hurS4cWK3
 l7DHSIeWM2RCuJVPizHDM5Sr88P59t5cQm0JOt5t9WkUqAB8Abv6dJvGqkrghTbF
 xHAzyCax3xvnv+kuyRBo
 =8lyD
 -----END PGP SIGNATURE-----

Merge tag 'gpio-v4.16-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

Pull GPIO fix from Linus Walleij:
 "This is a single GPIO fix for the v4.16 series affecting the Renesas
  driver, and fixes wakeup from external stuff"

* tag 'gpio-v4.16-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
  gpio: rcar: Use wakeup_path i.s.o. explicit clock handling
2018-03-11 13:05:15 -07:00
Gregory CLEMENT
3cd2c313f1 dmaengine: mv_xor_v2: Fix clock resource by adding a register clock
On the CP110 components which are present on the Armada 7K/8K SoC we need
to explicitly enable the clock for the registers. However it is not
needed for the AP8xx component, that's why this clock is optional.

With this patch both clock have now a name, but in order to be backward
compatible, the name of the first clock is not used. It allows to still
use this clock with a device tree using the old binding.

Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2018-03-11 20:33:27 +05:30
Linus Torvalds
3266b5bd97 Kbuild fixes for v4.16 (2nd)
- make fixdep parse kconfig.h to fix missing rebuild
 
 - replace hyphens with underscores in builtin DTB label names
 
 - fix typos
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABAgAGBQJao+BsAAoJED2LAQed4NsGR+wQAKGslOYu+2swZur6UATf3vNU
 kVlkQCs0ZLi8+vnCBCHuN7Qh+2SyHE3pedMVRKXl8n0fP65hiH42I+yMNJQ+zRh+
 wGjZdOWxjB80a8HUG9gbiCLfKaZ+7H1YYlWzhUvgJiEqmyKzDuXMYaYNbeOh1yJg
 dzTUuMvirw9OpT60FZqcR4Z8ivCbi0BmI9vOzKukQcgvXbPUkAX40yrxstPN3FeJ
 RWN0P/cKRhlYmM+42p0JcUqjt0OWGxKyoaOdTuz4ccOG9NEnRg4p9uygeedW615V
 7HMMdn/ZNvGmzAcMkkafOs6m0zLQyM3nW35sRdepXGCRjy2Np3hq7AMN9qpTH6Ol
 i5XGZH3phYi3K9L5gUEF3ex0EjaCRjqb3+ppN81GJ7uQHVra+CCq4M8CRRK73+Vh
 wvwjqDfnh11N8p2yg+VBcLr4z+alVGV0gpg8t3zsNZwSqxGI+nc0wlyuLR2hnP6z
 ZD8b/V1qEFa64y0BL89Swfu8u1q9NwS79hfN3TwZF8E7QKtqJtkOrX8stTXkCvJ6
 KUHfn7Z8Wosvmaz5NllR2aEGGDXM19mXVXoZ+3uNG8yM9whc0EDIrItT3ITF0Ryr
 f0SO+L7i+rHh1xCmKwWyWKZ7BQUzkFD5O2tOJxaglYF4juO5vqw9MuEQGNb9Kqa9
 ouRcrBf/B+7mfv4AilAM
 =dyKQ
 -----END PGP SIGNATURE-----

Merge tag 'kbuild-fixes-v4.16-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild fixes from Masahiro Yamada:

 - make fixdep parse kconfig.h to fix missing rebuild

 - replace hyphens with underscores in builtin DTB label names

 - fix typos

* tag 'kbuild-fixes-v4.16-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
  kbuild: Handle builtin dtb file names containing hyphens
  scripts/bloat-o-meter: fix typos in help
  fixdep: do not ignore kconfig.h
  fixdep: remove some false CONFIG_ matches
  fixdep: remove stale references to uml-config.h
2018-03-10 10:21:07 -08:00
Linus Torvalds
23b33acc5f linux-watchdog 4.16-fixes-2 merge window tag
-----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2.0.14 (GNU/Linux)
 
 iEYEABECAAYFAlqjrhoACgkQ+iyteGJfRsqqSACfS2mtTsPzvxofsaKjlUgG0PUu
 GtEAoKNM20k8Ni145/eCeosboYspForw
 =8Tgb
 -----END PGP SIGNATURE-----

Merge tag 'linux-watchdog-4.16-fixes-2' of git://www.linux-watchdog.org/linux-watchdog

Pull watchdog fixes from Wim Van Sebroeck:

 - f71808e_wdt: Fix magic close handling

 - sbsa: 32-bit read fix for WCV

 - hpwdt: Remove legacy NMI sourcing

* tag 'linux-watchdog-4.16-fixes-2' of git://www.linux-watchdog.org/linux-watchdog:
  watchdog: hpwdt: Remove legacy NMI sourcing.
  watchdog: sbsa: use 32-bit read for WCV
  watchdog: f71808e_wdt: Fix magic close handling
2018-03-10 10:17:59 -08:00
Linus Torvalds
91a262096e for-linus-20180309
-----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABCAAGBQJao2pFAAoJEPfTWPspceCmo7wQAJb9B2FR0BnT0FeXyn+K14sB
 rsldkfXlMuA6zgNdDZjyrk5x1tAUpwE1md636V00clz/jFuBd9Wh6FhPRsvyWfsT
 IRcYh4d1Ojewyn/XsphBEgsruxe2gUGDaJKaeETH5Fzq/lo+zk+XESYuS6BD0dCl
 pLUMdVgsPl1FTlYjG8Oo7tPZcfrWtyOJ8Ri503PadEOretKIbjo5LbpNrKDsQCBT
 BmVrZJEDRXow9TaNgUgF6cYmJm2YVjKLnmovpNxVF2kto0oOfzEKoiQk/4kA7U5r
 kwIT9kXZO81GZ8JiG7ccNDrbQ+ExCaNMUSyhyDqrVs89/9xCA8ffTGj1bZWW4zd5
 qw85McjcWGfZIzsVKpUr9xhZAVB9y1AwZ5en6bcSi5RVhltyxouBzFROq1iJEGis
 /OIz5XcOXAWMZWSa4PRh7PXSRXtmPh7mj4bE0GfnuWfIA9yPYk5sCe0Lq/XNFvC8
 NVw8TL//SyMQnMUTCzFbRx7DXzZ1CRVSvV/28k96Clmymy8ZAEWhsvYb5bpMHM4C
 rAL71OEjDda+Msl0WKF7IWXYiuu5CWHk8Gp7k10IdVsVAorBzLRLXJvd+J7/SETk
 sO5QYW3DIxHwwS7389g91c1zq9KevDJUnV9AqkwcX260kgYjyPAdQB1eOLPTSHx9
 aa20gUIfEEds35dWCZLK
 =1Ukr
 -----END PGP SIGNATURE-----

Merge tag 'for-linus-20180309' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:

 - a xen-blkfront fix from Bhavesh with a multiqueue fix when
   detaching/re-attaching

 - a few important NVMe fixes, including a revert for a sysfs fix that
   caused some user space confusion

 - two bcache fixes by way of Michael Lyle

 - a loop regression fix, fixing an issue with lost writes on DAX.

* tag 'for-linus-20180309' of git://git.kernel.dk/linux-block:
  loop: Fix lost writes caused by missing flag
  nvme_fc: rework sqsize handling
  nvme-fabrics: Ignore nr_io_queues option for discovery controllers
  xen-blkfront: move negotiate_mq to cover all cases of new VBDs
  Revert "nvme: create 'slaves' and 'holders' entries for hidden controllers"
  bcache: don't attach backing with duplicate UUID
  bcache: fix crashes in duplicate cache device register
  nvme: pci: pass max vectors as num_possible_cpus() to pci_alloc_irq_vectors
  nvme-pci: Fix EEH failure on ppc
2018-03-10 08:48:01 -08:00
Linus Torvalds
b3b25b1d9e - Fix an uninitialized variable false warning in dm bufio
- Fix DM's passthrough ioctl support to be race free against an
   underlying device being removed.
 
 - Fix corner-case of DM raid resync reporting if/when the raid becomes
   degraded during resync; otherwise automated raid repair will fail.
 
 - A few DM multipath fixes to make non-SCSI optimizations, that were
   introduced during the 4.16 merge, useful for all non-SCSI devices,
   rather than narrowly define this non-SCSI mode in terms of "nvme".
   This allows the removal of "queue_mode nvme" that really didn't need
   to be introduced.  Instead DM core will internalize whether
   nvme-specific IO submission optimizations are doable and DM multipath
   will only do SCSI-specific device handler operations if SCSI is in
   use.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQEcBAABAgAGBQJaou84AAoJEMUj8QotnQNaYucH/RTlx1kJ4S7dHqUVFQdYZoZM
 ngpBGQZrvcjGwiTqpFb5lbvS4eXL5tAJrmIlcP/vD5woP57kK6uaxWbhZTDKlARK
 UppM2FwA166szfYLMopA4yPj7o2+aBBF6y6Q9s5kP9UbsNIdBbPGBzz3JhThSu5q
 FB6YWhMuEpBwQT2Y5nrz/X5mBVnzjPnvCDeYh3HLihnPeYYZiupR9EVCJ7vRVc+S
 S8+oX6Yl9Jc6GWKQriQW+EEQN/9E6YMH4tTPvd8S5hT6uzznePx8myv60qXM894J
 f+O9gcna3rF41XIYleUEXbES0kwXZzISeJNo5NokTRIKEmn8fJU+tuvqAGTh/yQ=
 =1Ki0
 -----END PGP SIGNATURE-----

Merge tag 'for-4.16/dm-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm

Pull device mapper fixes from Mike Snitzer:

 - Fix an uninitialized variable false warning in dm bufio

 - Fix DM's passthrough ioctl support to be race free against an
   underlying device being removed.

 - Fix corner-case of DM raid resync reporting if/when the raid becomes
   degraded during resync; otherwise automated raid repair will fail.

 - A few DM multipath fixes to make non-SCSI optimizations, that were
   introduced during the 4.16 merge, useful for all non-SCSI devices,
   rather than narrowly define this non-SCSI mode in terms of "nvme".

   This allows the removal of "queue_mode nvme" that really didn't need
   to be introduced. Instead DM core will internalize whether
   nvme-specific IO submission optimizations are doable and DM multipath
   will only do SCSI-specific device handler operations if SCSI is in
   use.

* tag 'for-4.16/dm-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
  dm table: allow upgrade from bio-based to specialized bio-based variant
  dm mpath: remove unnecessary NVMe branching in favor of scsi_dh checks
  dm table: fix "nvme" test
  dm raid: fix incorrect sync_ratio when degraded
  dm: use blkdev_get rather than bdgrab when issuing pass-through ioctl
  dm bufio: avoid false-positive Wmaybe-uninitialized warning
2018-03-10 08:45:44 -08:00
Linus Torvalds
2f64e70cd0 Second pull request for 4.16-rc
- Various driver bug fixes in mlx5, mlx4, bnxt_re and qedr, ranging
   from bugs under load to bad error case handling
 - There in one largish patch fixing the locking in bnxt_re to avoid
   a machine hard lock situation
 - A few core bugs on error paths
 - A patch to reduce stack usage in the new CQ API
 - One mlx5 regression introduced in this merge window
 - There were new syzkaller scripts written for the RDMA subsystem
   and we are fixing issues found by the bot
 - One of the commits (aa0de36a40 “RDMA/mlx5: Fix integer overflow
   while resizing CQ”) is missing part of the commit log message and
   one of the SOB lines.  The original patch was from Leon Romanovsky,
   and a cut-n-paste separator in the commit message confused patchworks
   which then put the end of message separator in the wrong place in
   the downloaded patch, and I didn’t notice in time.  The patch made
   it into the official branch, and the only way to fix it in-place
   was to rebase.  Given the pain that a rebase causes, and the fact
   that the patch has relevant tags for stable and syzkaller, a revert
   of the munged patch and a reapplication of the original patch with
   the log message intact was done.
 -----BEGIN PGP SIGNATURE-----
 
 iQIcBAABAgAGBQJaoxYpAAoJELgmozMOVy/dPeoQAKUvtJzWaceuKdmNgh+Ut0qZ
 ZpaZIUwZsrrZAPOraxy36Q35vlzeb3AWLust3xTIHtb00tB55wgrWXo1KOPX4MhH
 AXDHCaYdjSdKewGo15zYXKAROs/BQ+ypoc3/jneqttTRtD0C93n0FpHb27k593Pu
 WzuvtqzVvLe11/IYk/lzlVHLuQRI1HIhUa2ygG/cFl1vLOcF1eY8Z+MdCS79uvv1
 s0FDB6yhIEcNaXGcDpIfQ6cJLVxLqBlvyCMB7Tok6Ss8Xk6383ZxXY/FrLkCMTo/
 rMiiWp9yhQ4hl+7NuO/KUWoeFuswjZso2vzerTe0DKdvAHO8fNNuC/Y6SuliEim7
 So7XVAFa0PArxw+/6sr8+nHkH0+O785xPU4qTgMRb9LyDw/Te7st1BHGJLuoNdER
 SM8LHKCd0LvP2hvi8fQpJNzfAqexaiJYqZlI3n+VdfyMZw6+IG8gGeNMQ1fKStF6
 rUve9+h91h7rW6W+jXOQwsMiMfSJLiKwtjapo6HRKYS3FUVd/wIdbjkNIc7rmgUy
 KI3zLanyfzOCFN5W8w4BBud25ibmxxuQMsZgx4oQUVYFWgosnQqTCAUNVlT2Pxou
 33yoWiwwcWZG3ATa5EfIBl1anqQP+mq7DxfQ6a/j1PNDl2Dh4DHWW1qwlhuIK8EU
 BYqPcWOFdk+DgGMjDJju
 =ZvN0
 -----END PGP SIGNATURE-----

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

Pull rdma fixes from Doug Ledford:

 - Various driver bug fixes in mlx5, mlx4, bnxt_re and qedr, ranging
   from bugs under load to bad error case handling

 - There in one largish patch fixing the locking in bnxt_re to avoid a
   machine hard lock situation

 - A few core bugs on error paths

 - A patch to reduce stack usage in the new CQ API

 - One mlx5 regression introduced in this merge window

 - There were new syzkaller scripts written for the RDMA subsystem and
   we are fixing issues found by the bot

 - One of the commits (aa0de36a40 “RDMA/mlx5: Fix integer overflow
   while resizing CQ”) is missing part of the commit log message and one
   of the SOB lines. The original patch was from Leon Romanovsky, and a
   cut-n-paste separator in the commit message confused patchworks which
   then put the end of message separator in the wrong place in the
   downloaded patch, and I didn’t notice in time. The patch made it into
   the official branch, and the only way to fix it in-place was to
   rebase. Given the pain that a rebase causes, and the fact that the
   patch has relevant tags for stable and syzkaller, a revert of the
   munged patch and a reapplication of the original patch with the log
   message intact was done.

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma: (25 commits)
  RDMA/mlx5: Fix integer overflow while resizing CQ
  Revert "RDMA/mlx5: Fix integer overflow while resizing CQ"
  RDMA/ucma: Check that user doesn't overflow QP state
  RDMA/mlx5: Fix integer overflow while resizing CQ
  RDMA/ucma: Limit possible option size
  IB/core: Fix possible crash to access NULL netdev
  RDMA/bnxt_re: Avoid Hard lockup during error CQE processing
  RDMA/core: Reduce poll batch for direct cq polling
  IB/mlx5: Fix an error code in __mlx5_ib_modify_qp()
  IB/mlx5: When not in dual port RoCE mode, use provided port as native
  IB/mlx4: Include GID type when deleting GIDs from HW table under RoCE
  IB/mlx4: Fix corruption of RoCEv2 IPv4 GIDs
  RDMA/qedr: Fix iWARP write and send with immediate
  RDMA/qedr: Fix kernel panic when running fio over NFSoRDMA
  RDMA/qedr: Fix iWARP connect with port mapper
  RDMA/qedr: Fix ipv6 destination address resolution
  IB/core : Add null pointer check in addr_resolve
  RDMA/bnxt_re: Fix the ib_reg failure cleanup
  RDMA/bnxt_re: Fix incorrect DB offset calculation
  RDMA/bnxt_re: Unconditionly fence non wire memory operations
  ...
2018-03-10 08:38:01 -08:00
Linus Torvalds
b3337a6c35 platform-drivers-x86 for v4.16-6
Correct a module loading race condition between the DELL_SMBIOS backend
 modules and the first user by converting them to bool features of the
 DELL_SMBIOS driver. Fixup the resulting Kconfig dependency issue with
 DCDBAS.
 
 The following is an automated git shortlog grouped by driver:
 
  -  Resolve dependency error on DCDBAS
  -  Allow for SMBIOS backend defaults
  -  Link all dell-smbios-* modules together
  -  Rename dell-smbios source to dell-smbios-base
  -  Correct some style warnings
 -----BEGIN PGP SIGNATURE-----
 
 iQEcBAABAgAGBQJaot3AAAoJEKbMaAwKp364dmgIAIfHTsJK43WBdhiA8t+ZR2eI
 vW6gWOmTR0srhybgBFh+yNd0ljH4Ogb/JUrFuF6cemtpWxTJC+KS0gZWbHFw/5w5
 OsovY0/8AVtC7IFVe0HH3w3fZwsGGq4H/LU1K580cRF/YYzMVXnr2ASkIqn/EUzS
 voeAuL23JYvq+ByAqqKmA3tN7/+YpMrt5MPkJHk/MGnGxspTapcMvEK/fkYSlDWa
 MpWuKWqfFMM02sV37zyNQYaU64+5/FtGL/2OwsuMD6OgCism+FS/gPhR1JYLtPbd
 GKJoSfWqn2cMnLTA+1V9ya0zvGAwK4AdIoe4Cjg49pITXZneNfw+NzoQUe12Yg4=
 =FAX7
 -----END PGP SIGNATURE-----

Merge tag 'platform-drivers-x86-v4.16-6' of git://git.infradead.org/linux-platform-drivers-x86

Pull x86 platform driver fixes from Darren Hart:
 "Correct a module loading race condition between the DELL_SMBIOS
  backend modules and the first user by converting them to bool features
  of the DELL_SMBIOS driver. Fixup the resulting Kconfig dependency
  issue with DCDBAS"

* tag 'platform-drivers-x86-v4.16-6' of git://git.infradead.org/linux-platform-drivers-x86:
  platform/x86: dell-smbios: Resolve dependency error on DCDBAS
  platform/x86: Allow for SMBIOS backend defaults
  platform/x86: dell-smbios: Link all dell-smbios-* modules together
  platform/x86: dell-smbios: Rename dell-smbios source to dell-smbios-base
  platform/x86: dell-smbios: Correct some style warnings
2018-03-10 08:35:29 -08:00
Linus Torvalds
cdb06e9d8f KVM fixes for v4.16-rc5
PPC:
  - Fix guest time accounting in the host
  - Fix large-page backing for radix guests on POWER9
  - Fix HPT guests on POWER9 backed by 2M or 1G pages
  - Compile fixes for some configs and gcc versions
 
 s390:
  - Fix random memory corruption when running as guest2 (e.g. KVM in
    LPAR) and starting guest3 (e.g. nested KVM) with many CPUs
  - Export forgotten io interrupt delivery statistics counter
 -----BEGIN PGP SIGNATURE-----
 
 iQEcBAABCAAGBQJaoupNAAoJEED/6hsPKofoT2gH/1P6cNF3Gz3T7fetuan5Tyhw
 o5zduUxkM2AmTxzim9GPsKc5nsnPMnDraHCpQ9O2WW6VHvRZ6pwgtbtEtF2cx2Hv
 70o5gQzap/odA8eoV98xRbZ+aZHrZgs/z2Ql5eXk32BIs57TOQZVQ/mW+BA4Ixos
 8lOLYXuNY0lSL7Cp0MBY76ed8100ZTp7sfFByg3AmWDy7qhYOk9C3wPYNqPNfkuB
 eqZ9XPKV3vJuqc2xSJvsW4DjBcqZTxqDbw+EOA3MuUMH/JRkt7OuPgQHl/G5BqAW
 JcLb8ENfXNbamiakvarVenvnAJKJTLs8s9K8Z8ADXolY6NlGysGcrJo5dnGWN5A=
 =UxpG
 -----END PGP SIGNATURE-----

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull KVM fixes from Radim Krčmář:
 "PPC:

   - Fix guest time accounting in the host

   - Fix large-page backing for radix guests on POWER9

   - Fix HPT guests on POWER9 backed by 2M or 1G pages

   - Compile fixes for some configs and gcc versions

  s390:

   - Fix random memory corruption when running as guest2 (e.g. KVM in
     LPAR) and starting guest3 (e.g. nested KVM) with many CPUs

   - Export forgotten io interrupt delivery statistics counter"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: s390: fix memory overwrites when not using SCA entries
  KVM: PPC: Book3S HV: Fix guest time accounting with VIRT_CPU_ACCOUNTING_GEN
  KVM: PPC: Book3S HV: Fix VRMA initialization with 2MB or 1GB memory backing
  KVM: PPC: Book3S HV: Fix handling of large pages in radix page fault handler
  KVM: s390: provide io interrupt kvm_stat
  KVM: PPC: Book3S: Fix compile error that occurs with some gcc versions
  KVM: PPC: Fix compile error that occurs when CONFIG_ALTIVEC=n
2018-03-09 16:59:19 -08:00
Linus Torvalds
39614481fb xen: fix for V4.16-rc5
-----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2
 
 iQEcBAABAgAGBQJaotGdAAoJELDendYovxMvzPoIAJ/wdIyikhIl4gFRY3dNJUfk
 iPfqmzc5y6zqVMYOHXy4aM1WsNqSJjzHQPNQQ/EgPC6EwvqnbRKTA1Z+06t8idtx
 RsjmQaiXUo+Rdo0QnuFUEZYwrec74GasujsnLy/CJcJOK6bULyoCETDluU6cXUJ1
 VcETKTselFPb19Hah6SNOkKn00J6ZYLddpF9RcYEpbln7cAzWKTvd0B/kNW24ToM
 OkH4m0qO0OzNHxLO31ZG2H/C8VukscQO7PTdcECenjkXnyztfkoLzCJswd7hGIDE
 JmQJgWKALZfPtwqFztC1bu7Y0N+aOxChggaXxKPlytmfs083EGFZ8H5SYZnhugs=
 =mXIM
 -----END PGP SIGNATURE-----

Merge tag 'for-linus-4.16a-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen fix from Juergen Gross:
 "Just one fix for the correct error handling after a failed
  device_register()"

* tag 'for-linus-4.16a-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen: xenbus: use put_device() instead of kfree()
2018-03-09 16:54:18 -08:00
Linus Torvalds
4178802c77 arm64 fixes:
- The SMCCC firmware interface for the spectre variant 2 mitigation has
   been updated to allow the discovery of whether the CPU needs the
   workaround. This pull request relaxes the kernel check on the return
   value from firmware.
 
 - Fix the commit allowing changing from global to non-global page table
   entries which inadvertently disallowed other safe attribute changes.
 
 - Fix sleeping in atomic during the arm_perf_teardown_cpu() code.
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCAAdFiEE5RElWfyWxS+3PLO2a9axLQDIXvEFAlqi040ACgkQa9axLQDI
 XvFnJQ//YTCYifVu7pBY50czqDjBZ8BONQJFtMCsz/id4fBeELrciN5jNklWXA/y
 yYg+9Rb4UAEomqCRJWRU6MdIx52UagWlJ2Cn0G5q48uMdY9YFCJ4V8M6IFikvSUp
 o0p6Ldhee4r2yv6iBs125c7vIW/4c3nrTb03nsEJrjesKjcW1JSrzuJ0Py+x6ZIP
 AMuZocGlUOZ3NlKTPTQqY//fFCBp/hjvYzgUmPpcSZE/3E5pLHoxAIkkLMsaXaLH
 eWAbT9/E3NfQoBX2xisp7fyfd5nXZZ5IfEFJC90Dtl+yMb4I3DPgmBXclGFC8Rxd
 YOyabVAx9vpyBPGa9h4EtwMSRmiNwLwKxfCcXii8gAV7lPDqOyzduQTeepNCv6iY
 ioPHnx3mEEpfEF8TCV0lXzcsPdQnkfQcciJGxoz31KQe3TIp1keGASfwbn/Q575S
 i8/pHg9PS1r18tQIrrm/0lnBvkiyBFiKxPgOaWk4GXFYNh34GS9+xnTOsTuGOgGg
 vjQ0gRIkseqOeVuZSwD6kkj0f70NsjreTOaXF8eCA4cpGIia+cGUAOPR1SKTF3o6
 XkDjCRpde0KZoon95qye0+mVVJHOPgLs5VXFEngF7HCbI6spXxMSKuKoRYUbXZQj
 ddXQeaPY0wisMWmerDM9jkbhaprNsKp7b9CGmZKWAYXaa6+Y93w=
 =jVvu
 -----END PGP SIGNATURE-----

Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 fixes from Catalin Marinas:

 - The SMCCC firmware interface for the spectre variant 2 mitigation has
   been updated to allow the discovery of whether the CPU needs the
   workaround. This pull request relaxes the kernel check on the return
   value from firmware.

 - Fix the commit allowing changing from global to non-global page table
   entries which inadvertently disallowed other safe attribute changes.

 - Fix sleeping in atomic during the arm_perf_teardown_cpu() code.

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: Relax ARM_SMCCC_ARCH_WORKAROUND_1 discovery
  arm_pmu: Use disable_irq_nosync when disabling SPI in CPU teardown hook
  arm64: mm: fix thinko in non-global page table attribute check
2018-03-09 16:49:30 -08:00
Linus Torvalds
ed3c4dff8d The Sphinx 1.7 release broke the build process for reasons that are mostly
our fault.  This is a single fix cherry-picked from docs-next that restores
 docs buildability for all supported Sphinx versions.
 -----BEGIN PGP SIGNATURE-----
 
 iQJDBAABCAAtFiEEUOvtSCFqLxY/7px3jc41VjAi5XoFAlqiyLMPHGNvcmJldEBs
 d24ubmV0AAoJEI3ONVYwIuV6ePoQAK68+ymsML3xptZ0KoWV0PEHJUI+Ajnejj8/
 8ikgQWrg/cYkOu+gd0X6L/BewsM3cZ7zo2a7wBM8xK4HSme86Uz522CVGFieB/VF
 SFSUjFknVi9a2Bi4WBwR33EYUjUi6yDMVVfojPgC+fninqx6G5RV+vQSxWArgM3y
 aJwZqiBG7SfLUUQ8656JAWfJgmnnxHPC6DyOfTBm/UvuJZmHYmbo/UbAUlpfWG7I
 eG1Ks6CsbC0cfIWR2cs/tQe1tymkRMlaZwdTzkP2prXJ9ivtjtPtgnIyyTNZ5Dn/
 Uouf5egQDeRI/gdJg9Qy3cXGMMCzRXCCbkm0bg9lCG4vFcOTqRUi9GKvV8/n8G8o
 BFNd7ycIbcUDK3+WdVZYrGk2tPB4sqs8VFaau6ESJpvqBXc7S3Nj9UN2fw9IteyO
 U5Z15pc/2Lp8nSy6lHqDb70Fmpu3ksbk1odMDyGkpsO3XgFD8pbXMlI8Niijcqjb
 i12JHm3zjyhSIX4XNk/e9OWrTtx7O5wCUqVDNsjhGHuUvuaMIpm/q05DrLNHyfsE
 06D8tvtYR1R/W9nVByAdbbGVJioaRPqJNLjYkYqQn6FnGHNr5WwI6Mli12hVhWAc
 UYjqF6iQg3myrmvKSj8NcIXKRIdRmfw3I02xflprbqa4SUfUTF61Xq61jRjv3PM5
 FlgNPFBw
 =SAyC
 -----END PGP SIGNATURE-----

Merge tag 'docs-4.16-fix' of git://git.lwn.net/linux

Pull Documentation build fix from Jonathan Corbet:
 "The Sphinx 1.7 release broke the build process for reasons that are
  mostly our fault.

  This is a single fix cherry-picked from docs-next that restores docs
  buildability for all supported Sphinx versions"

* tag 'docs-4.16-fix' of git://git.lwn.net/linux:
  Documentation/sphinx: Fix Directive import error
2018-03-09 16:45:57 -08:00
Linus Torvalds
cfc79ae844 Merge branch 'akpm' (patches from Andrew)
Merge misc fixes from Andrew Morton:
 "8 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  lib/test_kmod.c: fix limit check on number of test devices created
  selftests/vm/run_vmtests: adjust hugetlb size according to nr_cpus
  mm/page_alloc: fix memmap_init_zone pageblock alignment
  mm/memblock.c: hardcode the end_pfn being -1
  mm/gup.c: teach get_user_pages_unlocked to handle FOLL_NOWAIT
  lib/bug.c: exclude non-BUG/WARN exceptions from report_bug()
  bug: use %pB in BUG and stack protector failure
  hugetlb: fix surplus pages accounting
2018-03-09 16:42:25 -08:00
Luis R. Rodriguez
ac68b1b3b9 lib/test_kmod.c: fix limit check on number of test devices created
As reported by Dan the parentheses is in the wrong place, and since
unlikely() call returns either 0 or 1 it's never less than zero.  The
second issue is that signed integer overflows like "INT_MAX + 1" are
undefined behavior.

Since num_test_devs represents the number of devices, we want to stop
prior to hitting the max, and not rely on the wrap arround at all.  So
just cap at num_test_devs + 1, prior to assigning a new device.

Link: http://lkml.kernel.org/r/20180224030046.24238-1-mcgrof@kernel.org
Fixes: d9c6a72d6f ("kmod: add test driver to stress test the module loader")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-03-09 16:40:02 -08:00
Li Zhijian
0627be7d3c selftests/vm/run_vmtests: adjust hugetlb size according to nr_cpus
Fix userfaultfd_hugetlb on hosts which have more than 64 cpus.

  ---------------------------
  running userfaultfd_hugetlb
  ---------------------------
  invalid MiB
  Usage: <MiB> <bounces>
  [FAIL]

Via userfaultfd.c we can know, hugetlb_size needs to meet hugetlb_size
>= nr_cpus * hugepage_size.  hugepage_size is often 2M, so when host
cpus > 64, it requires more than 128M.

[zhijianx.li@intel.com: update changelog/comments and variable name]
 Link: http://lkml.kernel.org/r/20180302024356.83359-1-zhijianx.li@intel.com
 Link: http://lkml.kernel.org/r/20180303125027.81638-1-zhijianx.li@intel.com
Link: http://lkml.kernel.org/r/20180302024356.83359-1-zhijianx.li@intel.com
Signed-off-by: Li Zhijian <zhijianx.li@intel.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: SeongJae Park <sj38.park@gmail.com>
Cc: Philippe Ombredanne <pombredanne@nexb.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-03-09 16:40:01 -08:00
Daniel Vacek
864b75f9d6 mm/page_alloc: fix memmap_init_zone pageblock alignment
Commit b92df1de5d ("mm: page_alloc: skip over regions of invalid pfns
where possible") introduced a bug where move_freepages() triggers a
VM_BUG_ON() on uninitialized page structure due to pageblock alignment.
To fix this, simply align the skipped pfns in memmap_init_zone() the
same way as in move_freepages_block().

Seen in one of the RHEL reports:

  crash> log | grep -e BUG -e RIP -e Call.Trace -e move_freepages_block -e rmqueue -e freelist -A1
  kernel BUG at mm/page_alloc.c:1389!
  invalid opcode: 0000 [#1] SMP
  --
  RIP: 0010:[<ffffffff8118833e>]  [<ffffffff8118833e>] move_freepages+0x15e/0x160
  RSP: 0018:ffff88054d727688  EFLAGS: 00010087
  --
  Call Trace:
   [<ffffffff811883b3>] move_freepages_block+0x73/0x80
   [<ffffffff81189e63>] __rmqueue+0x263/0x460
   [<ffffffff8118c781>] get_page_from_freelist+0x7e1/0x9e0
   [<ffffffff8118caf6>] __alloc_pages_nodemask+0x176/0x420
  --
  RIP  [<ffffffff8118833e>] move_freepages+0x15e/0x160
   RSP <ffff88054d727688>

  crash> page_init_bug -v | grep RAM
  <struct resource 0xffff88067fffd2f8>          1000 -        9bfff	System RAM (620.00 KiB)
  <struct resource 0xffff88067fffd3a0>        100000 -     430bffff	System RAM (  1.05 GiB = 1071.75 MiB = 1097472.00 KiB)
  <struct resource 0xffff88067fffd410>      4b0c8000 -     4bf9cfff	System RAM ( 14.83 MiB = 15188.00 KiB)
  <struct resource 0xffff88067fffd480>      4bfac000 -     646b1fff	System RAM (391.02 MiB = 400408.00 KiB)
  <struct resource 0xffff88067fffd560>      7b788000 -     7b7fffff	System RAM (480.00 KiB)
  <struct resource 0xffff88067fffd640>     100000000 -    67fffffff	System RAM ( 22.00 GiB)

  crash> page_init_bug | head -6
  <struct resource 0xffff88067fffd560>      7b788000 -     7b7fffff	System RAM (480.00 KiB)
  <struct page 0xffffea0001ede200>   1fffff00000000  0 <struct pglist_data 0xffff88047ffd9000> 1 <struct zone 0xffff88047ffd9800> DMA32          4096    1048575
  <struct page 0xffffea0001ede200> 505736 505344 <struct page 0xffffea0001ed8000> 505855 <struct page 0xffffea0001edffc0>
  <struct page 0xffffea0001ed8000>                0  0 <struct pglist_data 0xffff88047ffd9000> 0 <struct zone 0xffff88047ffd9000> DMA               1       4095
  <struct page 0xffffea0001edffc0>   1fffff00000400  0 <struct pglist_data 0xffff88047ffd9000> 1 <struct zone 0xffff88047ffd9800> DMA32          4096    1048575
  BUG, zones differ!

Note that this range follows two not populated sections
68000000-77ffffff in this zone.  7b788000-7b7fffff is the first one
after a gap.  This makes memmap_init_zone() skip all the pfns up to the
beginning of this range.  But this range is not pageblock (2M) aligned.
In fact no range has to be.

  crash> kmem -p 77fff000 78000000 7b5ff000 7b600000 7b787000 7b788000
        PAGE        PHYSICAL      MAPPING       INDEX CNT FLAGS
  ffffea0001e00000  78000000                0        0  0 0
  ffffea0001ed7fc0  7b5ff000                0        0  0 0
  ffffea0001ed8000  7b600000                0        0  0 0	<<<<
  ffffea0001ede1c0  7b787000                0        0  0 0
  ffffea0001ede200  7b788000                0        0  1 1fffff00000000

Top part of page flags should contain nodeid and zonenr, which is not
the case for page ffffea0001ed8000 here (<<<<).

  crash> log | grep -o fffea0001ed[^\ ]* | sort -u
  fffea0001ed8000
  fffea0001eded20
  fffea0001edffc0

  crash> bt -r | grep -o fffea0001ed[^\ ]* | sort -u
  fffea0001ed8000
  fffea0001eded00
  fffea0001eded20
  fffea0001edffc0

Initialization of the whole beginning of the section is skipped up to
the start of the range due to the commit b92df1de5d.  Now any code
calling move_freepages_block() (like reusing the page from a freelist as
in this example) with a page from the beginning of the range will get
the page rounded down to start_page ffffea0001ed8000 and passed to
move_freepages() which crashes on assertion getting wrong zonenr.

  >         VM_BUG_ON(page_zone(start_page) != page_zone(end_page));

Note, page_zone() derives the zone from page flags here.

From similar machine before commit b92df1de5d:

  crash> kmem -p 77fff000 78000000 7b5ff000 7b600000 7b7fe000 7b7ff000
        PAGE        PHYSICAL      MAPPING       INDEX CNT FLAGS
  fffff73941e00000  78000000                0        0  1 1fffff00000000
  fffff73941ed7fc0  7b5ff000                0        0  1 1fffff00000000
  fffff73941ed8000  7b600000                0        0  1 1fffff00000000
  fffff73941edff80  7b7fe000                0        0  1 1fffff00000000
  fffff73941edffc0  7b7ff000 ffff8e67e04d3ae0     ad84  1 1fffff00020068 uptodate,lru,active,mappedtodisk

All the pages since the beginning of the section are initialized.
move_freepages()' not gonna blow up.

The same machine with this fix applied:

  crash> kmem -p 77fff000 78000000 7b5ff000 7b600000 7b7fe000 7b7ff000
        PAGE        PHYSICAL      MAPPING       INDEX CNT FLAGS
  ffffea0001e00000  78000000                0        0  0 0
  ffffea0001e00000  7b5ff000                0        0  0 0
  ffffea0001ed8000  7b600000                0        0  1 1fffff00000000
  ffffea0001edff80  7b7fe000                0        0  1 1fffff00000000
  ffffea0001edffc0  7b7ff000 ffff88017fb13720        8  2 1fffff00020068 uptodate,lru,active,mappedtodisk

At least the bare minimum of pages is initialized preventing the crash
as well.

Customers started to report this as soon as 7.4 (where b92df1de5d was
merged in RHEL) was released.  I remember reports from
September/October-ish times.  It's not easily reproduced and happens on
a handful of machines only.  I guess that's why.  But that does not make
it less serious, I think.

Though there actually is a report here:
  https://bugzilla.kernel.org/show_bug.cgi?id=196443

And there are reports for Fedora from July:
  https://bugzilla.redhat.com/show_bug.cgi?id=1473242
and CentOS:
  https://bugs.centos.org/view.php?id=13964
and we internally track several dozens reports for RHEL bug
  https://bugzilla.redhat.com/show_bug.cgi?id=1525121

Link: http://lkml.kernel.org/r/0485727b2e82da7efbce5f6ba42524b429d0391a.1520011945.git.neelx@redhat.com
Fixes: b92df1de5d ("mm: page_alloc: skip over regions of invalid pfns where possible")
Signed-off-by: Daniel Vacek <neelx@redhat.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Pavel Tatashin <pasha.tatashin@oracle.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-03-09 16:40:01 -08:00
Daniel Vacek
379b03b7fa mm/memblock.c: hardcode the end_pfn being -1
This is just a cleanup.  It aids handling the special end case in the
next commit.

[akpm@linux-foundation.org: make it work against current -linus, not against -mm]
[akpm@linux-foundation.org: make it work against current -linus, not against -mm some more]
Link: http://lkml.kernel.org/r/1ca478d4269125a99bcfb1ca04d7b88ac1aee924.1520011944.git.neelx@redhat.com
Signed-off-by: Daniel Vacek <neelx@redhat.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Pavel Tatashin <pasha.tatashin@oracle.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-03-09 16:40:01 -08:00
Andrea Arcangeli
96312e6128 mm/gup.c: teach get_user_pages_unlocked to handle FOLL_NOWAIT
KVM is hanging during postcopy live migration with userfaultfd because
get_user_pages_unlocked is not capable to handle FOLL_NOWAIT.

Earlier FOLL_NOWAIT was only ever passed to get_user_pages.

Specifically faultin_page (the callee of get_user_pages_unlocked caller)
doesn't know that if FAULT_FLAG_RETRY_NOWAIT was set in the page fault
flags, when VM_FAULT_RETRY is returned, the mmap_sem wasn't actually
released (even if nonblocking is not NULL).  So it sets *nonblocking to
zero and the caller won't release the mmap_sem thinking it was already
released, but it wasn't because of FOLL_NOWAIT.

Link: http://lkml.kernel.org/r/20180302174343.5421-2-aarcange@redhat.com
Fixes: ce53053ce3 ("kvm: switch get_user_page_nowait() to get_user_pages_unlocked()")
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Reported-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Tested-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-03-09 16:40:01 -08:00
Kees Cook
1b4cfe3c0a lib/bug.c: exclude non-BUG/WARN exceptions from report_bug()
Commit b8347c2196 ("x86/debug: Handle warnings before the notifier
chain, to fix KGDB crash") changed the ordering of fixups, and did not
take into account the case of x86 processing non-WARN() and non-BUG()
exceptions.  This would lead to output of a false BUG line with no other
information.

In the case of a refcount exception, it would be immediately followed by
the refcount WARN(), producing very strange double-"cut here":

  lkdtm: attempting bad refcount_inc() overflow
  ------------[ cut here ]------------
  Kernel BUG at 0000000065f29de5 [verbose debug info unavailable]
  ------------[ cut here ]------------
  refcount_t overflow at lkdtm_REFCOUNT_INC_OVERFLOW+0x6b/0x90 in cat[3065], uid/euid: 0/0
  WARNING: CPU: 0 PID: 3065 at kernel/panic.c:657 refcount_error_report+0x9a/0xa4
  ...

In the prior ordering, exceptions were searched first:

   do_trap_no_signal(struct task_struct *tsk, int trapnr, char *str,
   ...
                if (fixup_exception(regs, trapnr))
                        return 0;

  -               if (fixup_bug(regs, trapnr))
  -                       return 0;
  -

As a result, fixup_bugs()'s is_valid_bugaddr() didn't take into account
needing to search the exception list first, since that had already
happened.

So, instead of searching the exception list twice (once in
is_valid_bugaddr() and then again in fixup_exception()), just add a
simple sanity check to report_bug() that will immediately bail out if a
BUG() (or WARN()) entry is not found.

Link: http://lkml.kernel.org/r/20180301225934.GA34350@beast
Fixes: b8347c2196 ("x86/debug: Handle warnings before the notifier chain, to fix KGDB crash")
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Richard Weinberger <richard.weinberger@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-03-09 16:40:01 -08:00
Kees Cook
0862ca422b bug: use %pB in BUG and stack protector failure
The BUG and stack protector reports were still using a raw %p.  This
changes it to %pB for more meaningful output.

Link: http://lkml.kernel.org/r/20180301225704.GA34198@beast
Fixes: ad67b74d24 ("printk: hash addresses printed with %p")
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Richard Weinberger <richard.weinberger@gmail.com>,
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-03-09 16:40:01 -08:00
Michal Hocko
4704dea36d hugetlb: fix surplus pages accounting
Dan Rue has noticed that libhugetlbfs test suite fails counter test:

  # mount_point="/mnt/hugetlb/"
  # echo 200 > /proc/sys/vm/nr_hugepages
  # mkdir -p "${mount_point}"
  # mount -t hugetlbfs hugetlbfs "${mount_point}"
  # export LD_LIBRARY_PATH=/root/libhugetlbfs/libhugetlbfs-2.20/obj64
  # /root/libhugetlbfs/libhugetlbfs-2.20/tests/obj64/counters
  Starting testcase "/root/libhugetlbfs/libhugetlbfs-2.20/tests/obj64/counters", pid 3319
  Base pool size: 0
  Clean...
  FAIL    Line 326: Bad HugePages_Total: expected 0, actual 1

The bug was bisected to 0c397daea1 ("mm, hugetlb: further simplify
hugetlb allocation API").

The reason is that alloc_surplus_huge_page() misaccounts per node
surplus pages.  We should increase surplus_huge_pages_node rather than
nr_huge_pages_node which is already handled by alloc_fresh_huge_page.

Link: http://lkml.kernel.org/r/20180221191439.GM2231@dhcp22.suse.cz
Fixes: 0c397daea1 ("mm, hugetlb: further simplify hugetlb allocation API")
Signed-off-by: Michal Hocko <mhocko@suse.com>
Reported-by: Dan Rue <dan.rue@linaro.org>
Tested-by: Dan Rue <dan.rue@linaro.org>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-03-09 16:40:01 -08:00
Leon Romanovsky
28e9091e31 RDMA/mlx5: Fix integer overflow while resizing CQ
The user can provide very large cqe_size which will cause to integer
overflow as it can be seen in the following UBSAN warning:

=======================================================================
UBSAN: Undefined behaviour in drivers/infiniband/hw/mlx5/cq.c:1192:53
signed integer overflow:
64870 * 65536 cannot be represented in type 'int'
CPU: 0 PID: 267 Comm: syzkaller605279 Not tainted 4.15.0+ #90 Hardware
name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
rel-1.7.5-0-ge51488c-20140602_164612-nilsson.home.kraxel.org 04/01/2014
Call Trace:
 dump_stack+0xde/0x164
 ? dma_virt_map_sg+0x22c/0x22c
 ubsan_epilogue+0xe/0x81
 handle_overflow+0x1f3/0x251
 ? __ubsan_handle_negate_overflow+0x19b/0x19b
 ? lock_acquire+0x440/0x440
 mlx5_ib_resize_cq+0x17e7/0x1e40
 ? cyc2ns_read_end+0x10/0x10
 ? native_read_msr_safe+0x6c/0x9b
 ? cyc2ns_read_end+0x10/0x10
 ? mlx5_ib_modify_cq+0x220/0x220
 ? sched_clock_cpu+0x18/0x200
 ? lookup_get_idr_uobject+0x200/0x200
 ? rdma_lookup_get_uobject+0x145/0x2f0
 ib_uverbs_resize_cq+0x207/0x3e0
 ? ib_uverbs_ex_create_cq+0x250/0x250
 ib_uverbs_write+0x7f9/0xef0
 ? cyc2ns_read_end+0x10/0x10
 ? print_irqtrace_events+0x280/0x280
 ? ib_uverbs_ex_create_cq+0x250/0x250
 ? uverbs_devnode+0x110/0x110
 ? sched_clock_cpu+0x18/0x200
 ? do_raw_spin_trylock+0x100/0x100
 ? __lru_cache_add+0x16e/0x290
 __vfs_write+0x10d/0x700
 ? uverbs_devnode+0x110/0x110
 ? kernel_read+0x170/0x170
 ? sched_clock_cpu+0x18/0x200
 ? security_file_permission+0x93/0x260
 vfs_write+0x1b0/0x550
 SyS_write+0xc7/0x1a0
 ? SyS_read+0x1a0/0x1a0
 ? trace_hardirqs_on_thunk+0x1a/0x1c
 entry_SYSCALL_64_fastpath+0x1e/0x8b
RIP: 0033:0x433549
RSP: 002b:00007ffe63bd1ea8 EFLAGS: 00000217
=======================================================================

Cc: syzkaller <syzkaller@googlegroups.com>
Cc: <stable@vger.kernel.org> # 3.13
Fixes: bde51583f4 ("IB/mlx5: Add support for resize CQ")
Reported-by: Noa Osherovich <noaos@mellanox.com>
Reviewed-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2018-03-09 18:10:48 -05:00
Doug Ledford
212a0cbc56 Revert "RDMA/mlx5: Fix integer overflow while resizing CQ"
The original commit of this patch has a munged log message that is
missing several of the tags the original author intended to be on the
patch.  This was due to patchworks misinterpreting a cut-n-paste
separator line as an end of message line and munging the mbox that was
used to import the patch:

https://patchwork.kernel.org/patch/10264089/

The original patch will be reapplied with a fixed commit message so the
proper tags are applied.

This reverts commit aa0de36a40.

Signed-off-by: Doug Ledford <dledford@redhat.com>
2018-03-09 18:07:46 -05:00
Linus Torvalds
c68a2cf07a pci-v4.16-fixes-3
-----BEGIN PGP SIGNATURE-----
 
 iQJIBAABCgAyFiEEgMe7l+5h9hnxdsnuWYigwDrT+vwFAlqiut4UHGJoZWxnYWFz
 QGdvb2dsZS5jb20ACgkQWYigwDrT+vx64g//XKYaUwlc6e2c0XxTmpOe/v/V/NF3
 nXCvkmZRb2GW3xsYyrzzHBeUJtgRVBZ58yQtw7jXqS8DxyXiGzGEGrCHOzWOXiFm
 JppL24KgdZk/Az4Fo1rN8h6bydeeTbkztLJBzBDQghmeaj7VQiI+aePjUAFmOvd/
 rBg25nERo3yI/bPh6lMjLwZp3e89+cKn7na9FX8xKt32T2YSVqnjYFn6xoiC6UMY
 9Gaferv5ZECdTViq9lZKHTqg8f4Xjc/ln3qYMs/CXf3qNb6gt1gtA8f5X78z7l24
 h3MIwe7nxX0iyKjUImQeRSsXcSvDYiZHqwHJilm5TKmvwl+r3OB5D6YsfMRP2GN8
 CRNiNUQApxGRqo+NJOoR1Ca+tkWjfnFClOMzDC1b0zwKBlLSyHGSUKIsoQ160djs
 8aZZqKiVLeHgZrEWrb1601VeOjxDzdNfLn0/8fMsDS4avhoAUVL/Rqze8nowaDcM
 98AJuGu8of3tWfz7A7WiBn9Y17R8tIYwdjAtL6O9YlhdpiazUkLo9HmquKXK5Yv7
 2Q5+uoMPXsVN5OXKGKOXWTo1YarqQRK3c1iTK9kb8wolkKTcuSN62wHDtsxWzDCG
 VxEwjz/yrbiNiTqznT4iSlXvlUwPl65W0+TFnLRh0LFXtjUAHiYcL5qEe3ah7TWc
 vf1Mc1v8SJiUtmU=
 =2F4R
 -----END PGP SIGNATURE-----

Merge tag 'pci-v4.16-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI fixes from Bjorn Helgaas:

 - fix sparc build issue when OF_IRQ not enabled (Guenter Roeck)

 - fix enumeration of devices below switches on DesignWare-based
   controllers (Koen Vandeputte)

* tag 'pci-v4.16-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  PCI: dwc: Fix enumeration end when reaching root subordinate
  PCI: Move of_irq_parse_and_map_pci() declaration under OF_IRQ
2018-03-09 13:31:08 -08:00
Linus Torvalds
99d7d64b60 fbdev fix for v4.16-rc5:
- fix kernel data leak in FBIOGETCMAP_SPARC ioctl (Peter Malone)
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABCAAGBQJaorOYAAoJEH4ztj+gR8ILAMcP/3OuHo2Oh9czd5LjhdpiHDA/
 liXIAWs8ujMGE0BNNXIeLJ8VCpXDRAqWdsEDzamIjrag8Um7oBCp/TLlHwwJl7nK
 P6vDn3QHdz7eWYSC7hs6bphlPlYVI9a8VpZOMxvj5w25oZfWADaaVDdmjofwXG4j
 6AjNb0F8Ls+SaprZABj7l9h7/zeX5AvtraTZz6hSwvxsoxR12YnpaeRzaFdaidux
 HV28RgHU1Yn6nTSSSu5oQVnWsknMxftowrd8ZMwqG3O7Ukn50nsSPEMeZmY/XoDb
 EZtPPodGzBKZYnZ/ZHYdh0MDFh8/n/tIbDzFeoqli2bTjhIzx3aELnvYrJF1RPlp
 YTGtYK+IHTZQZv8BxyHmrnSIfPi7rVqTPijybe4t9Feyq+TNfb0uBk12t//duO3W
 23hj4jAVIyWBOibstzKov8PaPusq3xlvJ0Pc0bsaEEzY6+ED5crhMGWONMkA7ekV
 Jq37G5N4egDK4dBI5nvnNVvejZ5fp9KjEDU7gowYEpjMIUS9n09xK1+pXa3mfsiX
 6LaDNEzDDOkt745c+j7NfLE+aFUH/SqHiEdOHbmd9/HSHYNcflBmBMMsgYbJ6mX0
 oeoKcD/8aYkTxEdqRNMqGSC+6uf2/7+KuPXV66Sf9DkGInpqAWDUxDAs8XrcczXl
 1Y8RaGn6cdi72nkZStQb
 =ukkh
 -----END PGP SIGNATURE-----

Merge tag 'fbdev-v4.16-rc5' of git://github.com/bzolnier/linux

Pull fbdev fix from Bartlomiej Zolnierkiewicz:
 "Just a single fix to close a kernel data leak in FBIOGETCMAP_SPARC
  ioctl"

* tag 'fbdev-v4.16-rc5' of git://github.com/bzolnier/linux:
  fbdev: Fixing arbitrary kernel leak in case FBIOGETCMAP_SPARC in sbusfb_ioctl_helper().
2018-03-09 13:25:21 -08:00
Linus Torvalds
65307f2e05 amdgfx, i915, sun4i fixes
-----BEGIN PGP SIGNATURE-----
 
 iQIcBAABAgAGBQJaoihEAAoJEAx081l5xIa+VukP/iO0Et1GzmcLvE1XHuOwm5q+
 tG4IgkLSF50IfU0OHc0BWPFoTeypicRJvuLM+NubMf/dg3l8y/UbIWqOJBntnkNX
 o3018iw4/pFIvpBE8x2g2ozEk8qEfiaTfZkTfNKuH1ZUFugZR44j9OWbeYmZYd6i
 GwmSLgLunbE0Bt3XqSHLm4VtbV2FCI1vj65IzYcEWygSa8sugADaeKZ+NvS77MOb
 yF2d+Tlx5IkD0fkOt34MsDH/0F+RGEUCmgJfgiy+AuA/SD/v7cZQinTOkpzm0LkV
 YSSugc7XVqjqugEWjt7yniirGlIPfcdJTzUB99OQ4rCGFhpSRZVB54RVGeOch/LS
 UogyW/cWG9sivgdUg7sXw5ws12NX5LpR8FHwXYxBJRZs+TQXnpEy1Idh4IxZzVF/
 wFhqckNxVo1POZLy2xhTyd4ML49JvVAZ4E+3WmniDKXRImD9S7bV35yPXQ2XA2rj
 KjJaYGntihrvHSvLseOc/cb5KxwvxQGT1yw6fiSGPV1n7kUemzLAMxAmBKnL+IPB
 QKzB5POnaqOsOg6GBmkXv3nGfLWQq1NIiK6XOlfBpW5g80WxuBlLN+gcgaaG5qKT
 CJGbVuQe5kptSXSsTXU1+e6oJre2FOtAncq3aQlPKS7EptqtPxSw0PWiZLsVXiVj
 /sZU6fBlCYGJoXIq25xK
 =tkxA
 -----END PGP SIGNATURE-----

Merge tag 'drm-fixes-for-v4.16-rc5' of git://people.freedesktop.org/~airlied/linux

Pull drm fixes from Dave Airlie:
 "There are a small set of sun4i and i915 fixes, and many more amdgpu
  fixes:

  sun4i:
   - divide by zero fix
   - clock and LVDS fixes

  i915:
   - fix for perf
   - race fix

  amdgpu:
   - a bit more than we are normally comfortable with at this point,
     however it does fix a lot of display issues with the new DC code
     which result in black screens in various configurations along with
     some run of the mill gpu configuration fixes.

     I'm happy enough that the fixes are limited to the DC code and
     should fix a bunch of issues on the new raven ridge APUs that we
     are seeing shipped now"

* tag 'drm-fixes-for-v4.16-rc5' of git://people.freedesktop.org/~airlied/linux: (42 commits)
  drm/amd/display: validate plane format on primary plane
  drm/amdgpu:Always save uvd vcpu_bo in VM Mode
  drm/amdgpu:Correct max uvd handles
  drm/amd/display: early return if not in vga mode in disable_vga
  drm/amd/display: Fix takover from VGA mode
  drm/amd/display: Fix memleaks when atomic check fails.
  drm/amd/display: Return success when enabling interrupt
  drm/amd/display: Use crtc enable/disable_vblank hooks
  drm/amd/display: update infoframe after dig fe is turned on
  drm/amd/display: fix boot-up on vega10
  drm/amd/display: fix cursor related Pstate hang
  drm/amd/display: Set irq state only on existing crtcs
  drm/amd/display: Fixed non-native modes not lighting up
  drm/amd/display: Call update_stream_signal directly from amdgpu_dm
  drm/amd/display: Make create_stream_for_sink more consistent
  drm/amd/display: Don't block dual-link DVI modes
  drm/amd/display: Don't allow dual-link DVI on all ASICs.
  drm/amd/display: Pass signal directly to enable_tmds_output
  drm/amd/display: Remove unnecessary fail labels in create_stream_for_sink
  drm/amd/display: Move MAX_TMDS_CLOCK define to header
  ...
2018-03-09 13:18:02 -08:00
Linus Torvalds
dfbab3fa45 sound fixes for 4.16-rc5
Two type of fixes:
 
 - The usual stuff, a handful HD-audio quirks for various machines
 
 - Further hardening against ALSA sequencer ioctl/write races that
   are triggered by fuzzer
 -----BEGIN PGP SIGNATURE-----
 
 iQJCBAABCAAsFiEEIXTw5fNLNI7mMiVaLtJE4w1nLE8FAlqiXaEOHHRpd2FpQHN1
 c2UuZGUACgkQLtJE4w1nLE/M8hAAwwOMDYE4DjhHn0MkzBZO75wBu6jZAQ0KdWUl
 sc2l7+i/0NvdR3CVBoGi8AddyqM/9QCoaqxS8i18wq4xcWgGNf2tzkBCjE8SRuUN
 briisw1RdKhXvciwMh2a82Cd03zKPwK6lTuxQbLNWbNGoldQJJ5gU5jXS5x3NHbE
 vyjo1TYasi7Lxv3FqXv0uWmJzOaU8CD7Tpow0gbm017iNIjqm7Y2BN59Z1FbEvlg
 kP2SSh9+cnaWXGZew2OYq4bBDWbVgVdIqVa5u56wL5akyIwMTAxjTrI4Az7vF7uT
 TEvHwBxvdxe+y+dr7j/bZLws3Nsq0gNrHwk7mK9+Xg94sSs6aqrQVveSL821Xelp
 I3K3PXHMv6ke7w+ywowj4ZdN4YGJP6f8jZfsEsU1LcFiYaelZwbYmLw/QWl27yJq
 Ao5YFbj6k32fTCl6R/FOiWDm6MMO17/XoNYAjahxxuvC3ZdyxZNZi4oDvSvMWlF+
 eG0lrk0yZrrN7Xl9vNWOTdVnoFfPQNaXSxk3veRbWwyYpIDmvSnQz0YgTHTXwfW1
 ehodmSWFiQ6yabpCQEy1gWgiFfG2f9Pjbk1tznHUR+eg2Kwx5RZuQGbuoZxDPJcB
 LojsJ/hJGxCB96gjy388k6kEmDSOkUolgHLhp68oBHnbRC+6vRs/LWDP+pblWjid
 X7NpsHc=
 =jnDF
 -----END PGP SIGNATURE-----

Merge tag 'sound-4.16-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "Two type of fixes:

   - The usual stuff, a handful HD-audio quirks for various machines

   - Further hardening against ALSA sequencer ioctl/write races that are
     triggered by fuzzer"

* tag 'sound-4.16-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda: add dock and led support for HP ProBook 640 G2
  ALSA: hda: add dock and led support for HP EliteBook 820 G3
  ALSA: hda/realtek - Make dock sound work on ThinkPad L570
  ALSA: seq: Remove superfluous snd_seq_queue_client_leave_cells() call
  ALSA: seq: More protection for concurrent write and ioctl races
  ALSA: seq: Don't allow resizing pool in use
  ALSA: hda/realtek - Fix dock line-out volume on Dell Precision 7520
  ALSA: hda/realtek: Limit mic boost on T480
  ALSA: hda/realtek - Add headset mode support for Dell laptop
  ALSA: hda/realtek - Add support headset mode for DELL WYSE
  ALSA: hda - Fix a wrong FIXUP for alc289 on Dell machines
2018-03-09 10:01:59 -08:00
Marc Zyngier
e21da1c992 arm64: Relax ARM_SMCCC_ARCH_WORKAROUND_1 discovery
A recent update to the ARM SMCCC ARCH_WORKAROUND_1 specification
allows firmware to return a non zero, positive value to describe
that although the mitigation is implemented at the higher exception
level, the CPU on which the call is made is not affected.

Let's relax the check on the return value from ARCH_WORKAROUND_1
so that we only error out if the returned value is negative.

Fixes: b092201e00 ("arm64: Add ARM_SMCCC_ARCH_WORKAROUND_1 BP hardening support")
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2018-03-09 17:52:07 +00:00
Matthew Wilcox
ff690eeed8 Documentation/sphinx: Fix Directive import error
Sphinx 1.7 removed sphinx.util.compat.Directive so people
who have upgraded cannot build the documentation.  Switch to
docutils.parsers.rst.Directive which has been available since
docutils 0.5 released in 2009.

Bugzilla: https://bugzilla.opensuse.org/show_bug.cgi?id=1083694
Co-developed-by: Takashi Iwai <tiwai@suse.de>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2018-03-09 10:46:14 -07:00
Linus Torvalds
719ea86151 Merge branch 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs
Pull overlayfs fixes from Miklos Szeredi:
 "This fixes a corner case for NFS exporting (introduced in this cycle)
  as well as fixing miscellaneous bugs"

* 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs:
  ovl: update Kconfig texts
  ovl: redirect_dir=nofollow should not follow redirect for opaque lower
  ovl: fix ptr_ret.cocci warnings
  ovl: check ERR_PTR() return value from ovl_lookup_real()
  ovl: check lower ancestry on encode of lower dir file handle
  ovl: hash non-dir by lower inode for fsnotify
2018-03-09 09:46:14 -08:00
Linus Torvalds
2d9b1d69c3 Changes since last update:
- Fix some iomap locking problems
 - Don't allocate cow blocks when we're zeroing file data
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2
 
 iQIcBAABCgAGBQJamePeAAoJEPh/dxk0SrTryPgP/0sh8xcAFUHR0ad7D74nSp3o
 1gjBi6Yl+i+hn5SZ/gkKPa5YFjTMaefcTV8rpZm3uPYbTf75TTscjKDDczFNEqoh
 CDKOeyfOchVSjhRI5ExElBh5ToxDgh+HMzzlmxk+olfWA+BXjJj2J2iLh871v9Ym
 hQl7xOYUDPu1xZz+jLhDLKG2Gd/R97ez2KZM43gKMAUsQ7eUbz6CtV73cFT+tNfP
 jjIe3xp6ohbJYJalMThbNcI2mOOssnCM8BHUDBJib7N4CXucJYTMpDAcGvNoFKul
 +K2Icyip1/6CS4LkWDpP29ayiH+sTbZk8/ipioe27hXXHGqKG84HQOBefRZmo4o0
 CC64SoomuxQX6V7qL6hf0Sz82QQbl+ToSliZ97xXP5o84/OxhggZGqVdykTR2+DB
 4POaJzRPmYJKPO4Q0yT2worB4oepAUrridJnaQE0y9F80xnLTvJxpD53atLCHulj
 Ht9NlvnvqndDYaYjQwvucOmdR9vCos3OjZCaXnYgL+EpbgZUvMeQoxuyBUBTdQeQ
 CNGq3EDssI75gD67sWeyFc+gOST259XofANw3mvlu3KS2/huviORJkDYdtzi2/LL
 gkCN9OW9CmXOaAiylE8dSAu98SAR+c83wmahMeBA2mq5vYrQU4rIDGYZi/Mulne4
 tD7eW5nlvps9Fsvf58fd
 =T9nM
 -----END PGP SIGNATURE-----

Merge tag 'xfs-4.16-fixes-3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

Pull xfs fixes from Darrick Wong:

 - Fix some iomap locking problems

 - Don't allocate cow blocks when we're zeroing file data

* tag 'xfs-4.16-fixes-3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: don't block on the ilock for RWF_NOWAIT
  xfs: don't start out with the exclusive ilock for direct I/O
  xfs: don't allocate COW blocks for zeroing holes or unwritten extents
2018-03-09 09:37:29 -08:00
Darren Hart (VMware)
32d7b19bad platform/x86: dell-smbios: Resolve dependency error on DCDBAS
When the DELL_SMBIOS_SMM backend is enabled, the DELL_SMBIOS symbol
depends on DELL_DCDBAS, and we must avoid the situation where
DELL_SMBIOS=y and DCDBAS=m.

Adding the conditional dependency to DELL_SMBIOS such as:

depends !DELL_SMBIOS_SMM || (DCDBAS || DCDBAS=n)

results in the Kconfig tooling complaining about a circular dependency,
although it appears to work in practice.

Avoid the errors by simplifying the dependency and forcing DELL_SMBIOS
to be <= DCDBAS if DCDBAS is enabled (thanks to Greg KH for the
suggestion).

Cc: Mario.Limonciello@dell.com
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>
2018-03-09 09:35:46 -08:00
Darren Hart (VMware)
329d58b890 platform/x86: Allow for SMBIOS backend defaults
Avoid accidental configurations by setting default y for DELL_SMBIOS
backends. Avoid this impacting the default build size, by making them
dependent on DELL_SMBIOS, so they only appear when DELL_SMBIOS is
manually selected, or by DELL_LAPTOP or DELL_WMI.

While DELL_SMBIOS does have a prompt, it does not have any dependencies.
Keeping DELL_SMBIOS visible, despite being "select"ed by DELL_LAPTOP and
DELL_WMI, is a deliberate choice to provide context for the WMI and SMM
backends, which would otherwise appear to float without context within
the menu.

Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>
2018-03-09 09:35:44 -08:00
Mario Limonciello
25d47027e1 platform/x86: dell-smbios: Link all dell-smbios-* modules together
Some race conditions were raised due to dell-smbios and its backends
not being ready by the time that a consumer would call one of the
exported methods.

To avoid this problem, guarantee that all initialization has been
done by linking them all together and running init for them all.

As part of this change the Kconfig needs to be adjusted so that
CONFIG_DELL_SMBIOS_SMM and CONFIG_DELL_SMBIOS_WMI are boolean
rather than modules.

CONFIG_DELL_SMBIOS is a visually selectable option again and both
CONFIG_DELL_SMBIOS_WMI and CONFIG_DELL_SMBIOS_SMM are optional.

Signed-off-by: Mario Limonciello <mario.limonciello@dell.com>
[dvhart: Update prompt and help text for DELL_SMBIOS_* backends]
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>
2018-03-09 09:35:42 -08:00
Mario Limonciello
94f77cb168 platform/x86: dell-smbios: Rename dell-smbios source to dell-smbios-base
This is being done to faciliate a later change to link all the dell-smbios
drivers together.

Signed-off-by: Mario Limonciello <mario.limonciello@dell.com>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>
2018-03-09 09:35:30 -08:00
Mario Limonciello
b53539625e platform/x86: dell-smbios: Correct some style warnings
WARNING: function definition argument 'struct calling_interface_buffer *'
should also have an identifier name
+       int (*call_fn)(struct calling_interface_buffer *);

WARNING: Block comments use * on subsequent lines
+       /* 4 bytes of table header, plus 7 bytes of Dell header,
	plus at least
+          6 bytes of entry */

WARNING: Block comments use a trailing */ on a separate line
+          6 bytes of entry */

Signed-off-by: Mario Limonciello <mario.limonciello@dell.com>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>
2018-03-09 09:35:16 -08:00
Linus Torvalds
a525df0558 powerpc fixes for 4.16 #5
One notable fix to properly advertise our support for a new firmware feature,
 caused by two series conflicting semantically but not textually.
 
 There's a new ioctl for the new ocxl driver, which is not a fix, but needed to
 complete the userspace API and good to have before the driver is in a released
 kernel.
 
 Finally three minor selftest fixes, and a fix for intermittent build failures
 for some obscure platforms, caused by a missing make dependency.
 
 Thanks to:
   Alastair D'Silva, Bharata B Rao, Guenter Roeck.
 -----BEGIN PGP SIGNATURE-----
 
 iQIwBAABCAAaBQJaomOTExxtcGVAZWxsZXJtYW4uaWQuYXUACgkQUevqPMjhpYBV
 LQ/+MyHQH7d/lhqRLWa3BVgy9mn2QfFTkRNMi46eqIWyk6wD5Qf//gzO+vTDzcEO
 rzkBu3XwhuhDCpCInLtJH17X8iKVy65Uk2JQ808pZTm0WnNTBv0ag251QARDg//B
 S1QmCQGJkpoUJ85+IDqQzV90K2o13BPWkAOrVh40G5GASvFGZRdxuTuo4DKeIe/j
 0yri2LRuL+cpcfmZqaJVco8l2tqJEi6zJRhL/ORrLr4XSy0clxF1q1MYshNWPDsB
 3l4r/yKz2aMltplknVVrpdMThUTD311kknIHoQuuEYvd6GxDz52d3B1lvE5Xb8EB
 sNJQX6q8ydab0u79/tTsXUm/EyfmMd6HMKOeVnQim19tnEe0wW6VkaPDNWWXa66U
 hW0qx7rX+zMSHzEcgLF7HKirzCQi2oS5ZMqXvhHlOPBb8Iy0O5za670AtvMGgm7/
 NKXKML31opgXmTcU2ZxBMrtL0S8ft3wHCKRLkB6H8GHE+6//Ps87bQaUo4v2KsOr
 2T/2w6TVtAwxLrASpCVonfcmIjjjIK4WILaOKp24Yzyv0eqen6Z3/kkga37sLgj8
 f11HzTfFWO5ckroHrJSVCOC48eWb+O1CWRwS4rofL1jLfucpv6VFTPK6F4G47pAj
 pZyIJMTem0AEgsxVBJlsw6TibGH5W6rzDE/2WpEqxb7iZh0=
 =ajRr
 -----END PGP SIGNATURE-----

Merge tag 'powerpc-4.16-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc fixes from Michael Ellerman:
 "One notable fix to properly advertise our support for a new firmware
  feature, caused by two series conflicting semantically but not
  textually.

  There's a new ioctl for the new ocxl driver, which is not a fix, but
  needed to complete the userspace API and good to have before the
  driver is in a released kernel.

  Finally three minor selftest fixes, and a fix for intermittent build
  failures for some obscure platforms, caused by a missing make
  dependency.

  Thanks to: Alastair D'Silva, Bharata B Rao, Guenter Roeck"

* tag 'powerpc-4.16-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/pseries: Fix vector5 in ibm architecture vector table
  ocxl: Document the OCXL_IOCTL_GET_METADATA IOCTL
  ocxl: Add get_metadata IOCTL to share OCXL information to userspace
  selftests/powerpc: Skip the subpage_prot tests if the syscall is unavailable
  selftests/powerpc: Fix missing clean of pmu/lib.o
  powerpc/boot: Fix random libfdt related build errors
  selftests/powerpc: Skip tm-trap if transactional memory is not enabled
2018-03-09 09:33:48 -08:00
Ross Zwisler
1d037577c3 loop: Fix lost writes caused by missing flag
The following commit:

commit aa4d86163e ("block: loop: switch to VFS ITER_BVEC")

replaced __do_lo_send_write(), which used ITER_KVEC iterators, with
lo_write_bvec() which uses ITER_BVEC iterators.  In this change, though,
the WRITE flag was lost:

-       iov_iter_kvec(&from, ITER_KVEC | WRITE, &kvec, 1, len);
+       iov_iter_bvec(&i, ITER_BVEC, bvec, 1, bvec->bv_len);

This flag is necessary for the DAX case because we make decisions based on
whether or not the iterator is a READ or a WRITE in dax_iomap_actor() and
in dax_iomap_rw().

We end up going through this path in configurations where we combine a PMEM
device with 4k sectors, a loopback device and DAX.  The consequence of this
missed flag is that what we intend as a write actually turns into a read in
the DAX code, so no data is ever written.

The very simplest test case is to create a loopback device and try and
write a small string to it, then hexdump a few bytes of the device to see
if the write took.  Without this patch you read back all zeros, with this
you read back the string you wrote.

For XFS this causes us to fail or panic during the following xfstests:

	xfs/074 xfs/078 xfs/216 xfs/217 xfs/250

For ext4 we have a similar issue where writes never happen, but we don't
currently have any xfstests that use loopback and show this issue.

Fix this by restoring the WRITE flag argument to iov_iter_bvec().  This
causes the xfstests to all pass.

Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: stable@vger.kernel.org
Fixes: commit aa4d86163e ("block: loop: switch to VFS ITER_BVEC")
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-03-09 08:36:36 -07:00
Masahiro Yamada
bd2746f09e clocksource/atmel-st: Add 'depends on HAS_IOMEM' to fix unmet dependency
The ATMEL_ST config selects MFD_SYSCON, but does not depend on HAS_IOMEM.

Compile testing on architecture without HAS_IOMEM causes "unmet direct
dependencies" in Kconfig phase. Detected by "make ARCH=score allyesconfig".

Add the proper dependency to the ATMEL_ST config.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Link: https://lkml.kernel.org/r/1520335233-11277-1-git-send-email-yamada.masahiro@socionext.com
2018-03-09 11:11:58 +01:00