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Andy Lutomirski
f970165bee x86/compat: remove is_compat_task() 
x86's is_compat_task always checked the current syscall type, not the
task type.  It has no non-arch users any more, so just remove it to
avoid confusion.

On x86, nothing should really be checking the task ABI.  There are
legitimate users for the syscall ABI and for the mm ABI.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2016-03-22 15:36:02 -07:00
Andy Lutomirski
7365abbade drivers/hid/uhid.c: check write() bitness using in_compat_syscall 
uhid changes the format expected in write() depending on bitness.  It
should check the syscall bitness directly.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: David Herrmann <dh.herrmann@googlemail.com>
Acked-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2016-03-22 15:36:02 -07:00
Andy Lutomirski
f4056b5284 input: redefine INPUT_COMPAT_TEST as in_compat_syscall() 
The input compat code should work like all other compat code: for 32-bit
syscalls, use the 32-bit ABI and for 64-bit syscalls, use the 64-bit
ABI.  We have a helper for that (in_compat_syscall()): just use it.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2016-03-22 15:36:02 -07:00
Andy Lutomirski
10f1685fd5 drivers/gpu/drm/amd/amdkfd: use in_compat_syscall to check open() caller type 
amdkfd wants to know syscall type, not task type.  Check directly.

Unfortunately, amdkfd is making nasty assumptions that a process'
bitness is a well-defined constant thing.  This isn't the case on x86.
I don't know how much this matters, but this patch has no effect on
generated code on x86, so amdkfd is equally broken with and without this
patch.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Oded Gabbay <oded.gabbay@gmail.com>
Cc: David Airlie <airlied@linux.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2016-03-22 15:36:02 -07:00
Andy Lutomirski
4f01ed221e drivers/firmware/efi/efivars.c: use in_compat_syscall() to check for compat callers 
This should make no difference on any architecture, as x86's historical
is_compat_task behavior really did check whether the calling syscall was
a compat syscall.  x86's is_compat_task is going away, though.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Reviewed-by: Matt Fleming <matt@codeblueprint.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2016-03-22 15:36:02 -07:00
Andy Lutomirski
a25045ff32 firewire: use in_compat_syscall to check ioctl compatness 
Firewire was using is_compat_task to check whether it was in a compat
ioctl or a non-compat ioctl.  Use is_compat_syscall instead so it works
properly on all architectures.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2016-03-22 15:36:02 -07:00
Andy Lutomirski
2bf8c47626 net/xfrm_user: use in_compat_syscall to deny compat syscalls 
The code wants to prevent compat code from receiving messages.  Use
in_compat_syscall for this.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2016-03-22 15:36:02 -07:00
Andy Lutomirski
96c0e0a908 net/sctp: use in_compat_syscall for sctp_getsockopt_connectx3 
SCTP unfortunately has a different ABI for SCTP_SOCKOPT_CONNECTX3 for
32-bit and 64-bit callers.  Use in_compat_syscall to correctly
distinguish them on all architectures.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Vlad Yasevich <vyasevich@gmail.com>
Cc: Neil Horman <nhorman@tuxdriver.com>
Cc: David Miller <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2016-03-22 15:36:02 -07:00
Andy Lutomirski
121cef8f17 ext4: in ext4_dir_llseek, check syscall bitness directly 
ext4 treats directory offsets differently for 32-bit and 64-bit callers.
Check the caller type using in_compat_syscall, not is_compat_task.  This
changes behavior on SPARC slightly.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Andreas Dilger <adilger.kernel@dilger.ca>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2016-03-22 15:36:02 -07:00
Andy Lutomirski
6d8bedff92 staging/lustre: switch from is_compat_task to in_compat_syscall 
AFAICT, lustre is trying to determine syscall bitness.  Use the new
accessor.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Oleg Drokin <oleg.drokin@intel.com>
Cc: Andreas Dilger <adilger.kernel@dilger.ca>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2016-03-22 15:36:02 -07:00
Andy Lutomirski
efbc0fbf34 auditsc: for seccomp events, log syscall compat state using in_compat_syscall 
Except on SPARC, this is what the code always did.  SPARC compat seccomp
was buggy, although the impact of the bug was limited because SPARC
32-bit and 64-bit syscall numbers are the same.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Paul Moore <paul@paul-moore.com>
Cc: Eric Paris <eparis@redhat.com>
Cc: David Miller <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2016-03-22 15:36:02 -07:00
Andy Lutomirski
5c465217a9 ptrace: in PEEK_SIGINFO, check syscall bitness, not task bitness 
Users of the 32-bit ptrace() ABI expect the full 32-bit ABI.  siginfo
translation should check ptrace() ABI, not caller task ABI.

This is an ABI change on SPARC.  Let's hope that no one relied on the
old buggy ABI.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2016-03-22 15:36:02 -07:00
Andy Lutomirski
5c38065e02 seccomp: check in_compat_syscall, not is_compat_task, in strict mode 
Seccomp wants to know the syscall bitness, not the caller task bitness,
when it selects the syscall whitelist.

As far as I know, this makes no difference on any architecture, so it's
not a security problem.  (It generates identical code everywhere except
sparc, and, on sparc, the syscall numbering is the same for both ABIs.)

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2016-03-22 15:36:02 -07:00
Andy Lutomirski
203f79078f sparc/syscall: fix syscall_get_arch 
Sparc's syscall_get_arch was buggy: it returned the task arch, not the
syscall arch.  This could confuse seccomp and audit.

I don't think this is as bad for seccomp as it looks: sparc's 32-bit and
64-bit syscalls are numbered the same.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: David S. Miller <davem@davemloft.net>
Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2016-03-22 15:36:02 -07:00
Andy Lutomirski
069923d87e sparc/compat: provide an accurate in_compat_syscall implementation 
On sparc64 compat-enabled kernels, any task can make 32-bit and 64-bit
syscalls.  is_compat_task returns true in 32-bit tasks, which does not
necessarily imply that the current syscall is 32-bit.

Provide an in_compat_syscall implementation that checks whether the
current syscall is compat.

As far as I know, sparc is the only architecture on which is_compat_task
checks the compat status of the task and on which the compat status of a
syscall can differ from the compat status of the task.  On x86,
is_compat_task checks the syscall type, not the task type.

[akpm@linux-foundation.org: add comment, per Sam]
[akpm@linux-foundation.org: update comment, per Andy]
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Acked-by: David S. Miller <davem@davemloft.net>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2016-03-22 15:36:02 -07:00
Andy Lutomirski
5180e3e24f compat: add in_compat_syscall to ask whether we're in a compat syscall 
A lot of code currently abuses is_compat_task to determine this.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Andreas Dilger <adilger.kernel@dilger.ca>
Cc: Clemens Ladisch <clemens@ladisch.de>
Cc: David Airlie <airlied@linux.ie>
Cc: David Herrmann <dh.herrmann@googlemail.com>
Cc: David Miller <davem@davemloft.net>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Eric Paris <eparis@redhat.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Ingo Molnar <mingo@elte.hu>
Acked-by: Jiri Kosina <jkosina@suse.cz>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Neil Horman <nhorman@tuxdriver.com>
Cc: Oded Gabbay <oded.gabbay@gmail.com>
Cc: Oleg Drokin <oleg.drokin@intel.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Paul Moore <paul@paul-moore.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2016-03-22 15:36:02 -07:00
Tetsuo Handa
b4aa14a63c kernel/hung_task.c: use timeout diff when timeout is updated 
When new timeout is written to /proc/sys/kernel/hung_task_timeout_secs,
khungtaskd is interrupted and again sleeps for full timeout duration.

This means that hang task will not be checked if new timeout is written
periodically within old timeout duration and/or checking of hang task
will be delayed for up to previous timeout duration.  Fix this by
remembering last time khungtaskd checked hang task.

This change will allow other watchdog tasks (if any) to share khungtaskd
by sleeping for minimal timeout diff of all watchdog tasks.  Doing more
watchdog tasks from khungtaskd will reduce the possibility of printk()
collisions by multiple watchdog threads.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Aaron Tomlin <atomlin@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2016-03-22 15:36:02 -07:00
Minchan Kim
3f2b1a04f4 zram: revive swap_slot_free_notify 
Commit b430e9d1c6 ("remove compressed copy from zram in-memory")
applied swap_slot_free_notify call in *end_swap_bio_read* to remove
duplicated memory between zram and memory.

However, with the introduction of rw_page in zram: 8c7f01025f ("zram:
implement rw_page operation of zram"), it became void because rw_page
doesn't need bio.

Memory footprint is really important in embedded platforms which have
small memory, for example, 512M) recently because it could start to kill
processes if memory footprint exceeds some threshold by LMK or some
similar memory management modules.

This patch restores the function for rw_page, thereby eliminating this
duplication.

Signed-off-by: Minchan Kim <minchan@kernel.org>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: karam.lee <karam.lee@lge.com>
Cc: <sangseok.lee@lge.com>
Cc: Chan Jeong <chan.jeong@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2016-03-22 15:36:02 -07:00
Gang He
d750c42ac2 ocfs2: add feature document for online file check 
This document will describe OCFS2 online file check feature.  OCFS2 is
often used in high-availaibility systems.  However, OCFS2 usually
converts the filesystem to read-only when encounters an error.  This may
not be necessary, since turning the filesystem read-only would affect
other running processes as well, decreasing availability.

Then, a mount option (errors=continue) is introduced, which would return
the -EIO errno to the calling process and terminate furhter processing
so that the filesystem is not corrupted further.  The filesystem is not
converted to read-only, and the problematic file's inode number is
reported in the kernel log.  The user can try to check/fix this file via
online filecheck feature.

Signed-off-by: Gang He <ghe@suse.com>
Cc: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Joseph Qi <joseph.qi@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2016-03-22 15:36:02 -07:00
Gang He
d56a8f32e4 ocfs2: check/fix inode block for online file check 
Implement online check or fix inode block during reading a inode block
to memory.

Signed-off-by: Gang He <ghe@suse.com>
Reviewed-by: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Joseph Qi <joseph.qi@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2016-03-22 15:36:02 -07:00
Gang He
a849d46816 ocfs2: create/remove sysfile for online file check 
Create online file check sysfile when ocfs2 mount, remove the related
sysfile when ocfs2 umount.

Signed-off-by: Gang He <ghe@suse.com>
Reviewed-by: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Joseph Qi <joseph.qi@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2016-03-22 15:36:02 -07:00
Gang He
a860f6eb4c ocfs2: sysfile interfaces for online file check 
Implement online file check sysfile interfaces, e.g. how to create the
related sysfile according to device name, how to display/handle file
check request from the sysfile.

Signed-off-by: Gang He <ghe@suse.com>
Reviewed-by: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Joseph Qi <joseph.qi@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2016-03-22 15:36:02 -07:00
Gang He
9dde5e4f33 ocfs2: export ocfs2_kset for online file check 
When there are errors in the ocfs2 filesystem, they are usually
accompanied by the inode number which caused the error.  This inode
number would be the input to fixing the file.  One of these options
could be considered:

A file in the sys filesytem which would accept inode numbers.  This
could be used to communication back what has to be fixed or is fixed.
You could write:

  $# echo "<inode>" > /sys/fs/ocfs2/devname/filecheck/check

or

  $# echo "<inode>" > /sys/fs/ocfs2/devname/filecheck/fix

Compare with second version, I re-design filecheck sysfs interfaces,
there are three sysfs files (check, fix and set) under filecheck
directory (see above), sysfs will accept only one argument <inode>.
Second, I adjust some code in ocfs2_filecheck_repair_inode_block()
function according to upstream feedback, we cannot just add VALID_FL
flag back as a inode block fix, then we will not fix this field
corruption currently until having a complete solution.  Compare with
first version, I use strncasecmp instead of double strncmp functions.
Second, update the source file contribution vendor.

This patch (of 4):

Export ocfs2_kset object from ocfs2_stackglue kernel module, then online
file check code will create the related sysfiles under ocfs2_kset
object.  We're exporting this because it's built in ocfs2_stackglue.ko.

Signed-off-by: Gang He <ghe@suse.com>
Reviewed-by: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Joseph Qi <joseph.qi@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2016-03-22 15:36:02 -07:00
Linus Torvalds
968f3e374f Merge branch 'for-linus-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs 
Pull btrfs updates from Chris Mason:
 "We have a good sized cleanup of our internal read ahead code, and the
  first series of commits from Chandan to enable PAGE_SIZE > sectorsize

  Otherwise, it's a normal series of cleanups and fixes, with many
  thanks to Dave Sterba for doing most of the patch wrangling this time"

* 'for-linus-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: (82 commits)
  btrfs: make sure we stay inside the bvec during __btrfs_lookup_bio_sums
  btrfs: Fix misspellings in comments.
  btrfs: Print Warning only if ENOSPC_DEBUG is enabled
  btrfs: scrub: silence an uninitialized variable warning
  btrfs: move btrfs_compression_type to compression.h
  btrfs: rename btrfs_print_info to btrfs_print_mod_info
  Btrfs: Show a warning message if one of objectid reaches its highest value
  Documentation: btrfs: remove usage specific information
  btrfs: use kbasename in btrfsic_mount
  Btrfs: do not collect ordered extents when logging that inode exists
  Btrfs: fix race when checking if we can skip fsync'ing an inode
  Btrfs: fix listxattrs not listing all xattrs packed in the same item
  Btrfs: fix deadlock between direct IO reads and buffered writes
  Btrfs: fix extent_same allowing destination offset beyond i_size
  Btrfs: fix file loss on log replay after renaming a file and fsync
  Btrfs: fix unreplayable log after snapshot delete + parent dir fsync
  Btrfs: fix lockdep deadlock warning due to dev_replace
  btrfs: drop unused argument in btrfs_ioctl_get_supported_features
  btrfs: add GET_SUPPORTED_FEATURES to the control device ioctls
  btrfs: change max_inline default to 2048
  ...
 2016-03-21 18:12:42 -07:00
Linus Torvalds
e531cdf50a MMC core: 
- Fix ABI regression of MMC BLK ioctl
  - Remove the unused MMC_DATA_STREAM flag
  - Enable asynchronous system PM for the host device
  - Minor fixes and clean-ups
 
 SDHCI host:
 Throughout the years, the numbers of SDHCI variants have increased and so
 has also the numbers of SDHCI callbacks/quirks. The purpose of these
 callbacks/quirks were to enable SDHCI to deal with variant specific
 requirements, but unfortunate this method didn't scale. Instead we have
 ended up with a mess. Not only did the code become suboptimal but also
 highly fragile.
 
 Lately many discussions of how to move forward with SDHCI has taken place
 at the MMC mailing list. Step by step, we aim to turn SDHCI's common code
 into a set of library functions. This will enable for optimizations and
 allow some of the existing callbacks/quirks to be removed, which also
 should help to make the code less fragile.
 
 Therefore I am also really pleased to announce that Adrian Hunter (Intel)
 has volunteered to step in as the maintainer for SDHCI.
 
 Future wise, I hope the community around SDHCI will continue to grow and
 that this release cycle can be the starting point of moving SDHCI into a
 better shape. As a matter of fact, already in this cycle the re-factoring
 has begun, but of course there are also fixes and new features included.
 Some highlights:
 
  - sdhci-iproc: Add support for Broadcom's BCM2835 eMMC IP
  - sdhci-acpi: Add support for QCOM controllers
  - sdhci-pic32: Add new SDHCI variant for PIC32MZDA
 
 Other hosts:
  - atmel-mci: Fix a NULL pointer dereference
  - mediatek: Add SD write-protect support
  - mmc_spi: Fix card detect in GPIO case
  - tmio/sdhi: Add r8a7795 support
  - tmio/sdhi: Some fixes and clean-ups
  - dw_mmc: Add HW reset support
  - dw_mmc: Some fixes and clean-ups
  - sunxi: Add support for MMC DDR52 mode
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Merge tag 'mmc-v4.6' of git://git.linaro.org/people/ulf.hansson/mmc

Pull MMC updates from Ulf Hansson:
 "MMC core:
      - Fix ABI regression of MMC BLK ioctl
      - Remove the unused MMC_DATA_STREAM flag
      - Enable asynchronous system PM for the host device
      - Minor fixes and clean-ups

  SDHCI host:
     Throughout the years, the numbers of SDHCI variants have increased
     and so has also the numbers of SDHCI callbacks/quirks.  The purpose
     of these callbacks/quirks were to enable SDHCI to deal with variant
     specific requirements, but unfortunate this method didn't scale.
     Instead we have ended up with a mess.  Not only did the code become
     suboptimal but also highly fragile.

     Lately many discussions of how to move forward with SDHCI has taken
     place at the MMC mailing list.  Step by step, we aim to turn
     SDHCI's common code into a set of library functions.  This will
     enable for optimizations and allow some of the existing callbacks
     and quirks to be removed, which also should help to make the code
     less fragile.

     Therefore I am also really pleased to announce that Adrian Hunter
     (Intel) has volunteered to step in as the maintainer for SDHCI.

     Future wise, I hope the community around SDHCI will continue to
     grow and that this release cycle can be the starting point of
     moving SDHCI into a better shape.  As a matter of fact, already in
     this cycle the re-factoring has begun, but of course there are also
     fixes and new features included.  Some highlights:

      - sdhci-iproc: Add support for Broadcom's BCM2835 eMMC IP
      - sdhci-acpi: Add support for QCOM controllers
      - sdhci-pic32: Add new SDHCI variant for PIC32MZDA

  Other hosts:
      - atmel-mci: Fix a NULL pointer dereference
      - mediatek: Add SD write-protect support
      - mmc_spi: Fix card detect in GPIO case
      - tmio/sdhi: Add r8a7795 support
      - tmio/sdhi: Some fixes and clean-ups
      - dw_mmc: Add HW reset support
      - dw_mmc: Some fixes and clean-ups
      - sunxi: Add support for MMC DDR52 mode"

* tag 'mmc-v4.6' of git://git.linaro.org/people/ulf.hansson/mmc: (123 commits)
  mmc: sdhci-of-at91: fix wake-up issue when using runtime pm
  mmc: sdhci-pci: Do not set DMA mask in enable_dma()
  mmc: sdhci-acpi: Remove enable_dma() hook
  mmc: sdhci: Set DMA mask when adding host
  mmc: block: fix ABI regression of mmc_blk_ioctl
  mmc: atmel-mci: Check pdata for NULL before dereferencing it at DMA config
  mmc: core: remove redundant memset of sdio_read_cccr
  mmc: core: remove redundant memset of mmc_decode_cid
  mmc: of_mmc_spi: fix unused warning
  mmc: sdhci-of-arasan: add phy support for sdhci-of-arasan
  mmc: sdhci-of-arasan: fix missing sdhci_pltfm_free for err handling
  mmc: sdhci-of-arasan: remove disable clk_ahb from sdhci_arasan_resume
  Documentation: bindings: add description of phy for sdhci-of-arasan
  mmc: sdhci: Fix override of timeout clk wrt max_busy_timeout
  mmc: mmci: Remove unnecessary header file
  mmc: sdhci-acpi: add QCOM controllers
  mmc: tegra: implement memcomp pad calibration
  mmc: mediatek: Use mmc_regulator_set_vqmmc in start_signal_voltage_switch
  mmc: mediatek: Change signal voltage error to dev_dbg()
  mmc: sh_mmcif, tmio: Use ARCH_RENESAS
  ...
 2016-03-21 14:35:52 -07:00
Linus Torvalds
4526b710c1 Merge tag 'md/4.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md 
Pull MD updates from Shaohua Li:
 "This update mainly fixes bugs.

   - a raid5 discard related fix from Jes
   - a MD multipath bio clone fix from Ming
   - raid1 error handling deadlock fix from Nate and corresponding
     raid10 fix from myself
   - a raid5 stripe batch fix from Neil
   - a patch from Sebastian to avoid unnecessary uevent
   - several cleanup/debug patches"

* tag 'md/4.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md:
  md/raid5: Cleanup cpu hotplug notifier
  raid10: include bio_end_io_list in nr_queued to prevent freeze_array hang
  raid1: include bio_end_io_list in nr_queued to prevent freeze_array hang
  md: fix typos for stipe
  md/bitmap: remove redundant return in bitmap_checkpage
  md/raid1: remove unnecessary BUG_ON
  md: multipath: don't hardcopy bio in .make_request path
  md/raid5: output stripe state for debug
  md/raid5: preserve STRIPE_PREREAD_ACTIVE in break_stripe_batch_list
  Update MD git tree URL
  md/bitmap: remove redundant check
  MD: warn for potential deadlock
  md: Drop sending a change uevent when stopping
  RAID5: revert e9e4c377e2 to fix a livelock
  RAID5: check_reshape() shouldn't call mddev_suspend
  md/raid5: Compare apples to apples (or sectors to sectors)
 2016-03-21 14:18:10 -07:00
Linus Torvalds
770c4c1119 [media] vsp1: use proper dma alloc/free functions 
I noticed this while merging the drm tree and checking for stragglers:
the vsp1 driver still used dma_[alloc|free]_writecombine() that got
renamed in commit f6e45661f9 ("dma, mm/pat: Rename
dma_*_writecombine() to dma_*_wc()")

I should have noticed back in the media merge (commit bace3db5da), but
better late than never.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2016-03-21 13:49:01 -07:00
Linus Torvalds
266c73b777 Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux 
Pull drm updates from Dave Airlie:
 "This is the main drm pull request for 4.6 kernel.

  Overall the coolest thing here for me is the nouveau maxwell signed
  firmware support from NVidia, it's taken a long while to extract this
  from them.

  I also wish the ARM vendors just designed one set of display IP, ARM
  display block proliferation is definitely increasing.

  Core:
     - drm_event cleanups
     - Internal API cleanup making mode_fixup optional.
     - Apple GMUX vga switcheroo support.
     - DP AUX testing interface

  Panel:
     - Refactoring of DSI core for use over more transports.

  New driver:
     - ARM hdlcd driver

  i915:
     - FBC/PSR (framebuffer compression, panel self refresh) enabled by default.
     - Ongoing atomic display support work
     - Ongoing runtime PM work
     - Pixel clock limit checks
     - VBT DSI description support
     - GEM fixes
     - GuC firmware scheduler enhancements

  amdkfd:
     - Deferred probing fixes to avoid make file or link ordering.

  amdgpu/radeon:
     - ACP support for i2s audio support.
     - Command Submission/GPU scheduler/GPUVM optimisations
     - Initial GPU reset support for amdgpu

  vmwgfx:
     - Support for DX10 gen mipmaps
     - Pageflipping and other fixes.

  exynos:
     - Exynos5420 SoC support for FIMD
     - Exynos5422 SoC support for MIPI-DSI

  nouveau:
     - GM20x secure boot support - adds acceleration for Maxwell GPUs.
     - GM200 support
     - GM20B clock driver support
     - Power sensors work

  etnaviv:
     - Correctness fixes for GPU cache flushing
     - Better support for i.MX6 systems.

  imx-drm:
     - VBlank IRQ support
     - Fence support
     - OF endpoint support

  msm:
     - HDMI support for 8996 (snapdragon 820)
     - Adreno 430 support
     - Timestamp queries support

  virtio-gpu:
     - Fixes for Android support.

  rockchip:
     - Add support for Innosilicion HDMI

  rcar-du:
     - Support for 4 crtcs
     - R8A7795 support
     - RCar Gen 3 support

  omapdrm:
     - HDMI interlace output support
     - dma-buf import support
     - Refactoring to remove a lot of legacy code.

  tilcdc:
     - Rewrite of pageflipping code
     - dma-buf support
     - pinctrl support

  vc4:
     - HDMI modesetting bug fixes
     - Significant 3D performance improvement.

  fsl-dcu (FreeScale):
     - Lots of fixes

  tegra:
     - Two small fixes

  sti:
     - Atomic support for planes
     - Improved HDMI support"

* 'drm-next' of git://people.freedesktop.org/~airlied/linux: (1063 commits)
  drm/amdgpu: release_pages requires linux/pagemap.h
  drm/sti: restore mode_fixup callback
  drm/amdgpu/gfx7: add MTYPE definition
  drm/amdgpu: removing BO_VAs shouldn't be interruptible
  drm/amd/powerplay: show uvd/vce power gate enablement for tonga.
  drm/amd/powerplay: show uvd/vce power gate info for fiji
  drm/amdgpu: use sched fence if possible
  drm/amdgpu: move ib.fence to job.fence
  drm/amdgpu: give a fence param to ib_free
  drm/amdgpu: include the right version of gmc header files for iceland
  drm/radeon: fix indentation.
  drm/amd/powerplay: add uvd/vce dpm enabling flag to fix the performance issue for CZ
  drm/amdgpu: switch back to 32bit hw fences v2
  drm/amdgpu: remove amdgpu_fence_is_signaled
  drm/amdgpu: drop the extra fence range check v2
  drm/amdgpu: signal fences directly in amdgpu_fence_process
  drm/amdgpu: cleanup amdgpu_fence_wait_empty v2
  drm/amdgpu: keep all fences in an RCU protected array v2
  drm/amdgpu: add number of hardware submissions to amdgpu_fence_driver_init_ring
  drm/amdgpu: RCU protected amd_sched_fence_release
  ...
 2016-03-21 13:48:00 -07:00
Linus Torvalds
2c856e14da arm[64] perf updates for 4.6: 
- Initial support for ARMv8.1 CPU PMUs
 
 - Support for the CPU PMU in Cavium ThunderX
 
 - CPU PMU support for systems running 32-bit Linux in secure mode
 
 - Support for the system PMU in ARM CCI-550 (Cache Coherent Interconnect)
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Merge tag 'arm64-perf' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm[64] perf updates from Will Deacon:
 "I have another mixed bag of ARM-related perf patches here.

  It's about 25% CPU and 75% interconnect, but with drivers/bus/
  languishing without an obvious maintainer or tree, Olof and I agreed
  to keep all of these PMU patches together.  I suspect a whole load of
  code from drivers/bus/arm-* can be moved under drivers/perf/, so
  that's on the radar for the future.

  Summary:

   - Initial support for ARMv8.1 CPU PMUs

   - Support for the CPU PMU in Cavium ThunderX

   - CPU PMU support for systems running 32-bit Linux in secure mode

   - Support for the system PMU in ARM CCI-550 (Cache Coherent Interconnect)"

* tag 'arm64-perf' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (26 commits)
  drivers/perf: arm_pmu: avoid NULL dereference when not using devicetree
  arm64: perf: Extend ARMV8_EVTYPE_MASK to include PMCR.LC
  arm-cci: remove unused variable
  arm-cci: don't return value from void function
  arm-cci: make private functions static
  arm-cci: CoreLink CCI-550 PMU driver
  arm-cci500: Rearrange PMU driver for code sharing with CCI-550 PMU
  arm-cci: CCI-500: Work around PMU counter writes
  arm-cci: Provide hook for writing to PMU counters
  arm-cci: Add helper to enable PMU without synchornising counters
  arm-cci: Add routines to save/restore all counters
  arm-cci: Get the status of a counter
  arm-cci: write_counter: Remove redundant check
  arm-cci: Delay PMU counter writes to pmu::pmu_enable
  arm-cci: Refactor CCI PMU enable/disable methods
  arm-cci: Group writes to counter
  arm-cci: fix handling cpumask_any_but return value
  arm-cci: simplify sysfs attr handling
  drivers/perf: arm_pmu: implement CPU_PM notifier
  arm64: dts: Add Cavium ThunderX specific PMU
  ...
 2016-03-21 13:14:16 -07:00
Linus Torvalds
d34687ab97 ARC updates for 4.6-rc1 
- Big Endian io accessors fix [Lada]
 - Spellos fixes [Adam]
 - Fix for DW GMAC breakage [Alexey]
 - Making DMA API 64-bit ready
 - Shutting up -Wmaybe-uninitialized noise for ARC
 - Other minor fixes here and there, comments update
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Merge tag 'arc-4.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc

Pull ARC architecture updates from Vineet Gupta:
 - Big Endian io accessors fix [Lada]
 - Spellos fixes [Adam]
 - Fix for DW GMAC breakage [Alexey]
 - Making DMA API 64-bit ready
 - Shutting up -Wmaybe-uninitialized noise for ARC
 - Other minor fixes here and there, comments update

* tag 'arc-4.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: (21 commits)
  ARCv2: ioremap: Support dynamic peripheral address space
  ARC: dma: reintroduce platform specific dma<->phys
  ARC: dma: ioremap: use phys_addr_t consistenctly in code paths
  ARC: dma: pass_phys() not sg_virt() to cache ops
  ARC: dma: non-coherent pages need V-P mapping if in HIGHMEM
  ARC: dma: Use struct page based page allocator helpers
  ARC: build: Turn off -Wmaybe-uninitialized for ARC gcc 4.8
  ARC: [plat-axs10x] add Ethernet PHY description in .dts
  arc: use of_platform_default_populate() to populate default bus
  ARC: thp: unbork !CONFIG_TRANSPARENT_HUGEPAGE build
  arc: [plat-nsimosci*] use ezchip network driver
  ARCv2: LLSC: software backoff is NOT needed starting HS2.1c
  ARC: mm: Use virt_to_pfn() for addr >> PAGE_SHIFT pattern
  ARC: [plat-nsim] document ranges
  ARC: build: Better way to detect ISA compatible toolchain
  ARCv2: Allow enabling PAE40 w/o HIGHMEM
  ARC: [BE] readl()/writel() to work in Big Endian CPU configuration
  ARC: [*defconfig] No need to specify CONFIG_CROSS_COMPILE
  ARC: [BE] Select correct CROSS_COMPILE prefix
  ARC: bitops: Remove non relevant comments
  ...
 2016-03-21 13:00:46 -07:00
Linus Torvalds
77d913178c Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs 
Pull UDF and quota updates from Jan Kara:
 "This contains a rewrite of UDF handling of filename encoding to fix
  remaining overflow issues from Andrew Gabbasov and quota changes to
  support new Q_[X]GETNEXTQUOTA quotactl for VFS quota formats"

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  quota: Fix possible GPF due to uninitialised pointers
  ext4: Make Q_GETNEXTQUOTA work for quota in hidden inodes
  quota: Forbid Q_GETQUOTA and Q_GETNEXTQUOTA for frozen filesystem
  quota: Fix possible races during quota loading
  ocfs2: Implement get_next_id()
  quota_v2: Implement get_next_id() for V2 quota format
  quota: Add support for ->get_nextdqblk() for VFS quota
  udf: Merge linux specific translation into CS0 conversion function
  udf: Remove struct ustr as non-needed intermediate storage
  udf: Use separate buffer for copying split names
  udf: Adjust UDF_NAME_LEN to better reflect actual restrictions
  udf: Join functions for UTF8 and NLS conversions
  udf: Parameterize output length in udf_put_filename
  quota: Allow Q_GETQUOTA for frozen filesystem
  quota: Fixup comments about return value of Q_[X]GETNEXTQUOTA
 2016-03-21 12:22:37 -07:00
Linus Torvalds
53d2e6976b xfs: Changes for 4.6-rc1 
Change summary:
 o error propagation for direct IO failures fixes for both XFS and ext4
 o new quota interfaces and XFS implementation for iterating all the quota IDs
   in the filesystem
 o locking fixes for real-time device extent allocation
 o reduction of duplicate information in the xfs and vfs inode, saving roughly
   100 bytes of memory per cached inode.
 o buffer flag cleanup
 o rework of the writepage code to use the generic write clustering mechanisms
 o several fixes for inode flag based DAX enablement
 o rework of remount option parsing
 o compile time verification of on-disk format structure sizes
 o delayed allocation reservation overrun fixes
 o lots of little error handling fixes
 o small memory leak fixes
 o enable xfsaild freezing again
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Merge tag 'xfs-for-linus-4.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc/linux-xfs

Pull xfs updates from Dave Chinner:
 "There's quite a lot in this request, and there's some cross-over with
  ext4, dax and quota code due to the nature of the changes being made.

  As for the rest of the XFS changes, there are lots of little things
  all over the place, which add up to a lot of changes in the end.

  The major changes are that we've reduced the size of the struct
  xfs_inode by ~100 bytes (gives an inode cache footprint reduction of
  >10%), the writepage code now only does a single set of mapping tree
  lockups so uses less CPU, delayed allocation reservations won't
  overrun under random write loads anymore, and we added compile time
  verification for on-disk structure sizes so we find out when a commit
  or platform/compiler change breaks the on disk structure as early as
  possible.

  Change summary:

   - error propagation for direct IO failures fixes for both XFS and
     ext4
   - new quota interfaces and XFS implementation for iterating all the
     quota IDs in the filesystem
   - locking fixes for real-time device extent allocation
   - reduction of duplicate information in the xfs and vfs inode, saving
     roughly 100 bytes of memory per cached inode.
   - buffer flag cleanup
   - rework of the writepage code to use the generic write clustering
     mechanisms
   - several fixes for inode flag based DAX enablement
   - rework of remount option parsing
   - compile time verification of on-disk format structure sizes
   - delayed allocation reservation overrun fixes
   - lots of little error handling fixes
   - small memory leak fixes
   - enable xfsaild freezing again"

* tag 'xfs-for-linus-4.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc/linux-xfs: (66 commits)
  xfs: always set rvalp in xfs_dir2_node_trim_free
  xfs: ensure committed is initialized in xfs_trans_roll
  xfs: borrow indirect blocks from freed extent when available
  xfs: refactor delalloc indlen reservation split into helper
  xfs: update freeblocks counter after extent deletion
  xfs: debug mode forced buffered write failure
  xfs: remove impossible condition
  xfs: check sizes of XFS on-disk structures at compile time
  xfs: ioends require logically contiguous file offsets
  xfs: use named array initializers for log item dumping
  xfs: fix computation of inode btree maxlevels
  xfs: reinitialise per-AG structures if geometry changes during recovery
  xfs: remove xfs_trans_get_block_res
  xfs: fix up inode32/64 (re)mount handling
  xfs: fix format specifier , should be %llx and not %llu
  xfs: sanitize remount options
  xfs: convert mount option parsing to tokens
  xfs: fix two memory leaks in xfs_attr_list.c error paths
  xfs: XFS_DIFLAG2_DAX limited by PAGE_SIZE
  xfs: dynamically switch modes when XFS_DIFLAG2_DAX is set/cleared
  ...
 2016-03-21 11:53:05 -07:00
Linus Torvalds
d407574e79 Merge tag 'for-f2fs-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs 
Pull f2fs updates from Jaegeuk Kim:
 "New Features:
   - uplift filesystem encryption into fs/crypto/
   - give sysfs entries to control memroy consumption

  Enhancements:
   - aio performance by preallocating blocks in ->write_iter
   - use writepages lock for only WB_SYNC_ALL
   - avoid redundant inline_data conversion
   - enhance forground GC
   - use wait_for_stable_page as possible
   - speed up SEEK_DATA and fiiemap

  Bug Fixes:
   - corner case in terms of -ENOSPC for inline_data
   - hung task caused by long latency in shrinker
   - corruption between atomic write and f2fs_trace_pid
   - avoid garbage lengths in dentries
   - revoke atomicly written pages if an error occurs

  In addition, there are various minor bug fixes and clean-ups"

* tag 'for-f2fs-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (81 commits)
  f2fs: submit node page write bios when really required
  f2fs: add missing argument to f2fs_setxattr stub
  f2fs: fix to avoid unneeded unlock_new_inode
  f2fs: clean up opened code with f2fs_update_dentry
  f2fs: declare static functions
  f2fs: use cryptoapi crc32 functions
  f2fs: modify the readahead method in ra_node_page()
  f2fs crypto: sync ext4_lookup and ext4_file_open
  fs crypto: move per-file encryption from f2fs tree to fs/crypto
  f2fs: mutex can't be used by down_write_nest_lock()
  f2fs: recovery missing dot dentries in root directory
  f2fs: fix to avoid deadlock when merging inline data
  f2fs: introduce f2fs_flush_merged_bios for cleanup
  f2fs: introduce f2fs_update_data_blkaddr for cleanup
  f2fs crypto: fix incorrect positioning for GCing encrypted data page
  f2fs: fix incorrect upper bound when iterating inode mapping tree
  f2fs: avoid hungtask problem caused by losing wake_up
  f2fs: trace old block address for CoWed page
  f2fs: try to flush inode after merging inline data
  f2fs: show more info about superblock recovery
  ...
 2016-03-21 11:03:02 -07:00
Linus Torvalds
5518f66b5a Merge branch 'for-4.6-ns' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup 
Pull cgroup namespace support from Tejun Heo:
 "These are changes to implement namespace support for cgroup which has
  been pending for quite some time now.  It is very straight-forward and
  only affects what part of cgroup hierarchies are visible.

  After unsharing, mounting a cgroup fs will be scoped to the cgroups
  the task belonged to at the time of unsharing and the cgroup paths
  exposed to userland would be adjusted accordingly"

* 'for-4.6-ns' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
  cgroup: fix and restructure error handling in copy_cgroup_ns()
  cgroup: fix alloc_cgroup_ns() error handling in copy_cgroup_ns()
  Add FS_USERNS_FLAG to cgroup fs
  cgroup: Add documentation for cgroup namespaces
  cgroup: mount cgroupns-root when inside non-init cgroupns
  kernfs: define kernfs_node_dentry
  cgroup: cgroup namespace setns support
  cgroup: introduce cgroup namespaces
  sched: new clone flag CLONE_NEWCGROUP for cgroup namespace
  kernfs: Add API to generate relative kernfs path
 2016-03-21 10:05:13 -07:00
Chris Mason
389f239c53 btrfs: make sure we stay inside the bvec during __btrfs_lookup_bio_sums 
Commit c40a3d38af (Btrfs: Compute and look up csums based on
sectorsized blocks) changes around how we walk the bios while looking up
crcs.  There's an inner loop that is jumping to the next bvec based on
sectors and before it derefs the next bvec, it needs to make sure we're
still in the bio.

In this case, the outer loop would have decided to stop moving forward
too, and the bvec deref is never actually used for anything.  But
CONFIG_DEBUG_PAGEALLOC catches it because we're outside our bio.

Signed-off-by: Chris Mason <clm@fb.com>
Reviewed-by: David Sterba <dsterba@suse.com>
 2016-03-21 07:25:44 -07:00
Will Deacon
357b565d5d drivers/perf: arm_pmu: avoid NULL dereference when not using devicetree 
Commit c6b90653f1 ("drivers/perf: arm_pmu: make info messages more
verbose") breaks booting on systems where the PMU is probed without
devicetree (e.g by inspecting the MIDR of the current CPU). In this case,
pdev->dev.of_node is NULL and we shouldn't try to access its ->fullname
field when printing probe error messages.

This patch fixes the probing code to use of_node_full_name, which safely
handles NULL nodes and removes the "Error %i" part of the string, since
it's not terribly useful.

Reported-by: Guenter Roeck <private@roeck-us.net>
Signed-off-by: Will Deacon <will.deacon@arm.com>
 2016-03-21 11:36:17 +00:00
Stephen Rothwell
568d7c764a drm/amdgpu: release_pages requires linux/pagemap.h 
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Reviewed-by: Christian König <christian.koenig@amd.com.
Signed-off-by: Dave Airlie <airlied@redhat.com>
 2016-03-21 13:22:52 +10:00
Linus Torvalds
643ad15d47 Merge branch 'mm-pkeys-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull x86 protection key support from Ingo Molnar:
 "This tree adds support for a new memory protection hardware feature
  that is available in upcoming Intel CPUs: 'protection keys' (pkeys).

  There's a background article at LWN.net:

      https://lwn.net/Articles/643797/

  The gist is that protection keys allow the encoding of
  user-controllable permission masks in the pte.  So instead of having a
  fixed protection mask in the pte (which needs a system call to change
  and works on a per page basis), the user can map a (handful of)
  protection mask variants and can change the masks runtime relatively
  cheaply, without having to change every single page in the affected
  virtual memory range.

  This allows the dynamic switching of the protection bits of large
  amounts of virtual memory, via user-space instructions.  It also
  allows more precise control of MMU permission bits: for example the
  executable bit is separate from the read bit (see more about that
  below).

  This tree adds the MM infrastructure and low level x86 glue needed for
  that, plus it adds a high level API to make use of protection keys -
  if a user-space application calls:

        mmap(..., PROT_EXEC);

  or

        mprotect(ptr, sz, PROT_EXEC);

  (note PROT_EXEC-only, without PROT_READ/WRITE), the kernel will notice
  this special case, and will set a special protection key on this
  memory range.  It also sets the appropriate bits in the Protection
  Keys User Rights (PKRU) register so that the memory becomes unreadable
  and unwritable.

  So using protection keys the kernel is able to implement 'true'
  PROT_EXEC on x86 CPUs: without protection keys PROT_EXEC implies
  PROT_READ as well.  Unreadable executable mappings have security
  advantages: they cannot be read via information leaks to figure out
  ASLR details, nor can they be scanned for ROP gadgets - and they
  cannot be used by exploits for data purposes either.

  We know about no user-space code that relies on pure PROT_EXEC
  mappings today, but binary loaders could start making use of this new
  feature to map binaries and libraries in a more secure fashion.

  There is other pending pkeys work that offers more high level system
  call APIs to manage protection keys - but those are not part of this
  pull request.

  Right now there's a Kconfig that controls this feature
  (CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS) that is default enabled
  (like most x86 CPU feature enablement code that has no runtime
  overhead), but it's not user-configurable at the moment.  If there's
  any serious problem with this then we can make it configurable and/or
  flip the default"

* 'mm-pkeys-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (38 commits)
  x86/mm/pkeys: Fix mismerge of protection keys CPUID bits
  mm/pkeys: Fix siginfo ABI breakage caused by new u64 field
  x86/mm/pkeys: Fix access_error() denial of writes to write-only VMA
  mm/core, x86/mm/pkeys: Add execute-only protection keys support
  x86/mm/pkeys: Create an x86 arch_calc_vm_prot_bits() for VMA flags
  x86/mm/pkeys: Allow kernel to modify user pkey rights register
  x86/fpu: Allow setting of XSAVE state
  x86/mm: Factor out LDT init from context init
  mm/core, x86/mm/pkeys: Add arch_validate_pkey()
  mm/core, arch, powerpc: Pass a protection key in to calc_vm_flag_bits()
  x86/mm/pkeys: Actually enable Memory Protection Keys in the CPU
  x86/mm/pkeys: Add Kconfig prompt to existing config option
  x86/mm/pkeys: Dump pkey from VMA in /proc/pid/smaps
  x86/mm/pkeys: Dump PKRU with other kernel registers
  mm/core, x86/mm/pkeys: Differentiate instruction fetches
  x86/mm/pkeys: Optimize fault handling in access_error()
  mm/core: Do not enforce PKEY permissions on remote mm access
  um, pkeys: Add UML arch_*_access_permitted() methods
  mm/gup, x86/mm/pkeys: Check VMAs and PTEs for protection keys
  x86/mm/gup: Simplify get_user_pages() PTE bit handling
  ...
 2016-03-20 19:08:56 -07:00
Linus Torvalds
24b5e20f11 Merge branch 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull EFI updates from Ingo Molnar:
 "The main changes are:

   - Use separate EFI page tables when executing EFI firmware code.
     This isolates the EFI context from the rest of the kernel, which
     has security and general robustness advantages.  (Matt Fleming)

   - Run regular UEFI firmware with interrupts enabled.  This is already
     the status quo under other OSs.  (Ard Biesheuvel)

   - Various x86 EFI enhancements, such as the use of non-executable
     attributes for EFI memory mappings.  (Sai Praneeth Prakhya)

   - Various arm64 UEFI enhancements.  (Ard Biesheuvel)

   - ... various fixes and cleanups.

  The separate EFI page tables feature got delayed twice already,
  because it's an intrusive change and we didn't feel confident about
  it - third time's the charm we hope!"

* 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (37 commits)
  x86/mm/pat: Fix boot crash when 1GB pages are not supported by the CPU
  x86/efi: Only map kernel text for EFI mixed mode
  x86/efi: Map EFI_MEMORY_{XP,RO} memory region bits to EFI page tables
  x86/mm/pat: Don't implicitly allow _PAGE_RW in kernel_map_pages_in_pgd()
  efi/arm*: Perform hardware compatibility check
  efi/arm64: Check for h/w support before booting a >4 KB granular kernel
  efi/arm: Check for LPAE support before booting a LPAE kernel
  efi/arm-init: Use read-only early mappings
  efi/efistub: Prevent __init annotations from being used
  arm64/vmlinux.lds.S: Handle .init.rodata.xxx and .init.bss sections
  efi/arm64: Drop __init annotation from handle_kernel_image()
  x86/mm/pat: Use _PAGE_GLOBAL bit for EFI page table mappings
  efi/runtime-wrappers: Run UEFI Runtime Services with interrupts enabled
  efi: Reformat GUID tables to follow the format in UEFI spec
  efi: Add Persistent Memory type name
  efi: Add NV memory attribute
  x86/efi: Show actual ending addresses in efi_print_memmap
  x86/efi/bgrt: Don't ignore the BGRT if the 'valid' bit is 0
  efivars: Use to_efivar_entry
  efi: Runtime-wrapper: Get rid of the rtc_lock spinlock
  ...
 2016-03-20 18:58:18 -07:00
Linus Torvalds
26660a4046 Merge branch 'core-objtool-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull 'objtool' stack frame validation from Ingo Molnar:
 "This tree adds a new kernel build-time object file validation feature
  (ONFIG_STACK_VALIDATION=y): kernel stack frame correctness validation.
  It was written by and is maintained by Josh Poimboeuf.

  The motivation: there's a category of hard to find kernel bugs, most
  of them in assembly code (but also occasionally in C code), that
  degrades the quality of kernel stack dumps/backtraces.  These bugs are
  hard to detect at the source code level.  Such bugs result in
  incorrect/incomplete backtraces most of time - but can also in some
  rare cases result in crashes or other undefined behavior.

  The build time correctness checking is done via the new 'objtool'
  user-space utility that was written for this purpose and which is
  hosted in the kernel repository in tools/objtool/.  The tool's (very
  simple) UI and source code design is shaped after Git and perf and
  shares quite a bit of infrastructure with tools/perf (which tooling
  infrastructure sharing effort got merged via perf and is already
  upstream).  Objtool follows the well-known kernel coding style.

  Objtool does not try to check .c or .S files, it instead analyzes the
  resulting .o generated machine code from first principles: it decodes
  the instruction stream and interprets it.  (Right now objtool supports
  the x86-64 architecture.)

  From tools/objtool/Documentation/stack-validation.txt:

   "The kernel CONFIG_STACK_VALIDATION option enables a host tool named
    objtool which runs at compile time.  It has a "check" subcommand
    which analyzes every .o file and ensures the validity of its stack
    metadata.  It enforces a set of rules on asm code and C inline
    assembly code so that stack traces can be reliable.

    Currently it only checks frame pointer usage, but there are plans to
    add CFI validation for C files and CFI generation for asm files.

    For each function, it recursively follows all possible code paths
    and validates the correct frame pointer state at each instruction.

    It also follows code paths involving special sections, like
    .altinstructions, __jump_table, and __ex_table, which can add
    alternative execution paths to a given instruction (or set of
    instructions).  Similarly, it knows how to follow switch statements,
    for which gcc sometimes uses jump tables."

  When this new kernel option is enabled (it's disabled by default), the
  tool, if it finds any suspicious assembly code pattern, outputs
  warnings in compiler warning format:

    warning: objtool: rtlwifi_rate_mapping()+0x2e7: frame pointer state mismatch
    warning: objtool: cik_tiling_mode_table_init()+0x6ce: call without frame pointer save/setup
    warning: objtool:__schedule()+0x3c0: duplicate frame pointer save
    warning: objtool:__schedule()+0x3fd: sibling call from callable instruction with changed frame pointer

  ... so that scripts that pick up compiler warnings will notice them.
  All known warnings triggered by the tool are fixed by the tree, most
  of the commits in fact prepare the kernel to be warning-free.  Most of
  them are bugfixes or cleanups that stand on their own, but there are
  also some annotations of 'special' stack frames for justified cases
  such entries to JIT-ed code (BPF) or really special boot time code.

  There are two other long-term motivations behind this tool as well:

   - To improve the quality and reliability of kernel stack frames, so
     that they can be used for optimized live patching.

   - To create independent infrastructure to check the correctness of
     CFI stack frames at build time.  CFI debuginfo is notoriously
     unreliable and we cannot use it in the kernel as-is without extra
     checking done both on the kernel side and on the build side.

  The quality of kernel stack frames matters to debuggability as well,
  so IMO we can merge this without having to consider the live patching
  or CFI debuginfo angle"

* 'core-objtool-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (52 commits)
  objtool: Only print one warning per function
  objtool: Add several performance improvements
  tools: Copy hashtable.h into tools directory
  objtool: Fix false positive warnings for functions with multiple switch statements
  objtool: Rename some variables and functions
  objtool: Remove superflous INIT_LIST_HEAD
  objtool: Add helper macros for traversing instructions
  objtool: Fix false positive warnings related to sibling calls
  objtool: Compile with debugging symbols
  objtool: Detect infinite recursion
  objtool: Prevent infinite recursion in noreturn detection
  objtool: Detect and warn if libelf is missing and don't break the build
  tools: Support relative directory path for 'O='
  objtool: Support CROSS_COMPILE
  x86/asm/decoder: Use explicitly signed chars
  objtool: Enable stack metadata validation on 64-bit x86
  objtool: Add CONFIG_STACK_VALIDATION option
  objtool: Add tool to perform compile-time stack metadata validation
  x86/kprobes: Mark kretprobe_trampoline() stack frame as non-standard
  sched: Always inline context_switch()
  ...
 2016-03-20 18:23:21 -07:00
Linus Torvalds
46e595a17d ARM: SoC driver updates for v4.6 
Driver updates for ARM SoCs, these contain various things that touch
 the drivers/ directory but got merged through arm-soc for practical
 reasons:
 
 - Rockchip rk3368 gains power domain support
 - Small updates for the ARM spmi driver
 - The Atmel PMC driver saw a larger rework, touching both
   arch/arm/mach-at91 and drivers/clk/at91
 - All reset controller driver changes alway get merged through
   arm-soc, though this time the largest change is the addition
   of a MIPS pistachio reset driver
 - One bugfix for the NXP (formerly Freescale) i.MX weim bus driver
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Merge tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC driver updates from Arnd Bergmann:
 "Driver updates for ARM SoCs, these contain various things that touch
  the drivers/ directory but got merged through arm-soc for practical
  reasons:

   - Rockchip rk3368 gains power domain support
   - Small updates for the ARM spmi driver
   - The Atmel PMC driver saw a larger rework, touching both
     arch/arm/mach-at91 and drivers/clk/at91
   - All reset controller driver changes alway get merged through
     arm-soc, though this time the largest change is the addition of a
     MIPS pistachio reset driver
   - One bugfix for the NXP (formerly Freescale) i.MX weim bus driver"

* tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (43 commits)
  bus: imx-weim: Take the 'status' property value into account
  clk: at91: remove useless includes
  clk: at91: pmc: remove useless capacities handling
  clk: at91: pmc: drop at91_pmc_base
  usb: gadget: atmel: access the PMC using regmap
  ARM: at91: remove useless includes and function prototypes
  ARM: at91: pm: move idle functions to pm.c
  ARM: at91: pm: find and remap the pmc
  ARM: at91: pm: simply call at91_pm_init
  clk: at91: pmc: move pmc structures to C file
  clk: at91: pmc: merge at91_pmc_init in atmel_pmc_probe
  clk: at91: remove IRQ handling and use polling
  clk: at91: make use of syscon/regmap internally
  clk: at91: make use of syscon to share PMC registers in several drivers
  hwmon: (scpi) add energy meter support
  firmware: arm_scpi: add support for 64-bit sensor values
  firmware: arm_scpi: decrease Tx timeout to 20ms
  firmware: arm_scpi: fix send_message and sensor_get_value for big-endian
  reset: sti: Make reset_control_ops const
  reset: zynq: Make reset_control_ops const
  ...
 2016-03-20 15:40:32 -07:00
Linus Torvalds
e3b1f64e04 ARM: SoC defconfig updates for v4.6 
As usual, a bunch of commits, mostly adding drivers and other options to
 defconfigs.
 
 The realview_smp_defconfig and realview_defconfig got merged into one,
 so we are now down to 110 files.
 
 For stm32, we have now added a Kconfig fragment, the first such
 file on arch/arm. The purpose here is to have a shared defconfig
 file that works for all boards, while the DRAM offset has to be
 hardwired on NOMMU machines at compile time.
 
 The Exynos defconfig changes depend on changes in the RTC tree,
 so this is pulled in here, but has already been merged into 4.6 now.
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Merge tag 'armsoc-defconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC defconfig updates from Arnd Bergmann:
 "As usual, a bunch of commits, mostly adding drivers and other options
  to defconfigs.

  The realview_smp_defconfig and realview_defconfig got merged into one,
  so we are now down to 110 files.

  For stm32, we have now added a Kconfig fragment, the first such file
  on arch/arm.  The purpose here is to have a shared defconfig file that
  works for all boards, while the DRAM offset has to be hardwired on
  NOMMU machines at compile time.

  The Exynos defconfig changes depend on changes in the RTC tree, so
  this is pulled in here, but has already been merged into 4.6 now"

* tag 'armsoc-defconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (45 commits)
  ARM: imx_v4_v5_defconfig: Enable initramfs support
  ARM: imx_v4_v5_defconfig: Cleanup imx_v4_v5_defconfig
  ARM: multi_v7_defconfig: Enable LP872x regulator support
  ARM: omap2plus_defconfig: Enable LP872x regulator support
  ARM: mxs_defconfig: Enable initramfs support
  ARM: mxs_defconfig: Cleanup mxs_defconfig
  ARM: multi_v5_defconfig: Enable initramfs support
  ARM: multi_v5_defconfig: Cleanup multi_v5_defconfig
  ARM: multi_v7_defconfig: enable useful configurations for Vybrid
  ARM: multi_v7_defconfig: add MACH_ARTPEC6
  ARM: omap2plus_defconfig: Enable AT24 eeprom
  ARM: omap2plus_defconfig: Enable TI TVP5150 video decoder support
  ARM: omap2plus_defconfig: Enable ISP support and dependencies
  ARM: omap2plus_defconfig: Enable OMAP IOMMU support
  ARM: socfpga_defconfig: enable support for initramfs/initrd support
  ARM: at91/defconfig: add sama5d2 adc support in sama5_defconfig
  ARM: multi_v7_defconfig: Enable BCM283x
  ARM: bcm2835_defconfig: Enable RPi power domain driver
  ARM: bcm2835_defconfig: Enable RPi firmware driver
  ARM: bcm2835_defconfig: enable ARMv7 support
  ...
 2016-03-20 15:32:14 -07:00
Linus Torvalds
915c56bc01 ARM: 64-bit DT updates for v4.6 
The arm64 device tree changes make up an increasing portion of
 the overall changes, so they are kept separate from the 32-bit
 devicetree changes and from the other arm64 updates.
 
 Newly added SoCs and boards are:
  - 96Boards Husky board
  - AMD Overdrive board
  - Amlogic S905 SoC and related Tronsmart boxes
  - Annapurna Labs Alpine family and development board
  - Broadcom Vulcan servers
  - Broadcom Northstar 2 SoC
  - Marvell Armada 3700 family and development board
  - Qualcomm MSM8996 SoC
 
 Additional devices are enabled for existing platforms from
 Applied Micro, Hisilicon, Mediatek, Qualcomm, and Renesas and
 there are a couple of other updates for Rockchip, Xilinx and
 NXP/Freescale.
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Merge tag 'armsoc-dt64' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM 64-bit DT updates from Arnd Bergmann:
 "The arm64 device tree changes make up an increasing portion of the
  overall changes, so they are kept separate from the 32-bit devicetree
  changes and from the other arm64 updates.

  Newly added SoCs and boards are:
   - 96Boards Husky board
   - AMD Overdrive board
   - Amlogic S905 SoC and related Tronsmart boxes
   - Annapurna Labs Alpine family and development board
   - Broadcom Vulcan servers
   - Broadcom Northstar 2 SoC
   - Marvell Armada 3700 family and development board
   - Qualcomm MSM8996 SoC

  Additional devices are enabled for existing platforms from Applied
  Micro, Hisilicon, Mediatek, Qualcomm, and Renesas and there are a
  couple of other updates for Rockchip, Xilinx and NXP/Freescale"

* tag 'armsoc-dt64' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (102 commits)
  ARM64: dts: amlogic: Add Tronsmart Vega S95 configs
  Documentation: devicetree: amlogic: Document Tronsmart Vega S95 boards
  ARM64: dts: Prepare configs for Amlogic Meson GXBaby
  Documentation: devicetree: amlogic: Document Meson GXBaby
  devicetree: bindings: Add vendor prefix for Tronsmart
  arm64: dts: qcom: Fix MPP's function used for LED control
  arm64: dts: alpine: add the MSIX node in the Alpine v2 dtsi
  arm64: dts: add the Alpine v2 EVP
  arm64: dts: marvell: re-order Device Tree nodes for Armada AP806
  arm64: dts: marvell: update Armada AP806 clock description
  arm64: dts: marvell: add Device Tree files for Armada 7K/8K
  arm64: dts: apm: Add DT node for X-Gene v2 SLIMpro Mailbox I2C Driver
  arm64: dts: apm: Mailbox device tree node for APM X-Gene v2 platform.
  arm64: dts: apm: Add DT node for X-Gene v1 SLIMpro Mailbox I2C Driver
  arm64: dts: apm: mailbox device tree node for APM X-Gene platform.
  arm64: dts: apm: Update GPIO to control power-off on X-Gene v2 platforms
  arm64: dts: apm: Update GPIO standby controller DT node for X-Gene v2 platforms
  arm64: dts: apm: Update GPIO to control power-off on X-Gene v1 platforms
  arm64: dts: salvator-x: enable USB 2.0 Host of channel 1 and 2
  arm64: dts: salvator-x: enable usb2_phy of channel 1 and 2
  ...
 2016-03-20 15:26:57 -07:00
Linus Torvalds
5a6b7e53d0 ARM: DT updates for v4.6 
These are all the updates to device tree files for 32-bit platforms,
 plus a couple of related 64-bit updates:
 
 New SoC support:
  - Allwinner A83T
  - Axis Artpec-6 SoC
  - Mediatek MT7623 SoC
  - TI Keystone K2G SoC
  - ST Microelectronics stm32f469
 
 New board or machine support:
  - ARM Juno R2
  - Buffalo Linkstation LS-QVL and LS-GL
  - Cubietruck plus
  - D-Link DIR-885L
  - DT support for ARM RealView PB1176 and PB11MPCore
  - Google Nexus 7
  - Homlet v2
  - Itead Ibox
  - Lamobo R1
  - LG Optimus Black
  - Logicpd dm3730
  - Raspberry Pi Model A
 
 Other changes include
  - Lots of updates for Qualcomm APQ8064, MSM8974 and others
  - Improved support for Nokia N900 and other OMAP machines
  - Common clk support for lpc32xx
  - HDLCD display on ARM
  - Improved stm32f429 support
  - Improved Renesas device support, r8a779x and others
  - Lots of Rockchip updates
  - Samsung cleanups
  - ADC support for Atmel SAMA5D2
  - BCM2835 (Raspberry Pi) improvements
  - Broadcom Northstar Plus enhancements
  - OMAP GPMC rework
  - Several improvements for Atmel SAMA5D2 / Xplained
  - Global change to remove inofficial "arm,amba-bus" compatible string
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Merge tag 'armsoc-dt' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM DT updates from Arnd Bergmann:
 "These are all the updates to device tree files for 32-bit platforms,
  plus a couple of related 64-bit updates:

  New SoC support:
   - Allwinner A83T
   - Axis Artpec-6 SoC
   - Mediatek MT7623 SoC
   - TI Keystone K2G SoC
   - ST Microelectronics stm32f469

  New board or machine support:
   - ARM Juno R2
   - Buffalo Linkstation LS-QVL and LS-GL
   - Cubietruck plus
   - D-Link DIR-885L
   - DT support for ARM RealView PB1176 and PB11MPCore
   - Google Nexus 7
   - Homlet v2
   - Itead Ibox
   - Lamobo R1
   - LG Optimus Black
   - Logicpd dm3730
   - Raspberry Pi Model A

  Other changes include
   - Lots of updates for Qualcomm APQ8064, MSM8974 and others
   - Improved support for Nokia N900 and other OMAP machines
   - Common clk support for lpc32xx
   - HDLCD display on ARM
   - Improved stm32f429 support
   - Improved Renesas device support, r8a779x and others
   - Lots of Rockchip updates
   - Samsung cleanups
   - ADC support for Atmel SAMA5D2
   - BCM2835 (Raspberry Pi) improvements
   - Broadcom Northstar Plus enhancements
   - OMAP GPMC rework
   - Several improvements for Atmel SAMA5D2 / Xplained
   - Global change to remove inofficial "arm,amba-bus" compatible
     string"

* tag 'armsoc-dt' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (350 commits)
  ARM, ARM64: dts: drop "arm,amba-bus" in favor of "simple-bus"
  ARM: dts: artpec: dual-license on artpec6.dtsi
  ARM: dts: ux500: add synaptics RMI4 for Ux500 TVK DT
  arm64: dts: juno/vexpress: fix node name unit-address presence warnings
  arm64: dts: foundation-v8: add SBSA Generic Watchdog device node
  ARM: dts: at91: sama5d2 Xplained: add leds node
  ARM: dts: at91: sama5d2 Xplained: add user push button
  ARM: dts: at91: sama5d2 Xplained: set pin muxing for usb gadget and usb host
  ARM: dts: stm32f429: Enable Ethernet on Eval board
  ARM: dts: omap3-sniper: TWL4030 keypad support
  Revert "ARM: dts: DRA7: Add dt nodes for PWMSS"
  ARM: dts: dm814x: dra62x: Disable wait pin monitoring for NAND
  ARM: dts: dm814x: dra62x: Fix NAND device nodes
  ARM: dts: stm32f429: Add Ethernet support
  ARM: dts: stm32f429: Add system config bank node
  ARM: dts: at91: sama5d2: add nand0 and nfc0 nodes
  ARM: dts: at91: sama5d2: add dma properties to UART nodes
  ARM: dts: at91: sama5d2 Xplained: Correct the macb irq pinctrl node
  ARM: dts: exynos: Don't overheat the Odroid XU3-Lite on high load
  ARM: dts: exynos: Add cooling levels for Exynos5422/5800 CPUs
  ...
 2016-03-20 15:15:48 -07:00
Linus Torvalds
8c6d4082fc ARM: SoC 64-bit changes for v4.6 
Here's our branch of ARM64 contents for this merge window, now
 containing all ARM64 changes other than device tree files.
 
 - Various new platforms get added
   - Allwinner A64 SoC
   - Annapurna Labs Alpine SoCs
   - Broadcom Vulcan
   - Marvell Armada 3700 SoCs
   - Amlogic S905
 
 - Various defconfig changes to enable platform specific drivers
 
 This branch includes the clk git tree to resolve a build-time
 dependency.
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Merge tag 'armsoc-arm64' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC 64-bit changes from Arnd Bergmann:
 "Here's our branch of ARM64 contents for this merge window, now
  containing all ARM64 changes other than device tree files.

   - Various new platforms get added:
      * Allwinner A64 SoC
      * Annapurna Labs Alpine SoCs
      * Broadcom Vulcan
      * Marvell Armada 3700 SoCs
      * Amlogic S905

   - Various defconfig changes to enable platform specific drivers

  This branch includes the clk git tree to resolve a build-time
  dependency"

* tag 'armsoc-arm64' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (48 commits)
  arm64: defconfig: Increase MMC_BLOCK_MINORS to 16
  arm64: defconfig: Add Qualcomm sdhci and restart functionality
  ARM64: Enable Amlogic Meson GXBaby platform
  arm64: defconfig: Enable Samsung MFD and related configs
  arm64: alpine: select the Alpine MSI controller driver
  arm64: defconfig: enable the Alpine family
  arm64: add Alpine SoC family
  arm64: defconfig: Enable exynos thermal config
  arm64: add defconfig options for Allwinner SoCs
  arm64: defconfig: Enable DesignWare APB GPIO controller
  arm64: defconfig: Add Renesas R-Car Gen3 USB 2.0 phy driver support
  arm64: EXYNOS: Consolidate ARCH_EXYNOS7 symbol into ARCH_EXYNOS
  clk: samsung: Don't build ARMv8 clock drivers on ARMv7
  MAINTAINERS: Add entry for Broadcom Vulcan SoC
  arm64: cputype info for Broadcom Vulcan
  arm64: Broadcom Vulcan support
  arm64: defconfig: Add Broadcom Vulcan to defconfig
  arm64: update ARCH_MVEBU for Marvell Armada 7K/8K support
  Documentation: arm: add Marvell Armada 7K and 8K families
  Documentation: arm: add link to Armada 38x Functional Spec
  ...
 2016-03-20 15:08:45 -07:00
Linus Torvalds
33b3d2e88c ARM: SoC platform updates for v4.6 
Newly added support for additional SoCs:
 
 - Axis Artpec-6 SoC family
 - Allwinner A83T SoC
 - Mediatek MT7623
 - NXP i.MX6QP SoC
 - ST Microelectronics stm32f469 microcontroller
 
 New features:
 - SMP support for Mediatek mt2701
 - Big-endian support for NXP i.MX
 - DaVinci now uses the new DMA engine dma_slave_map
 - OMAP now uses the new DMA engine dma_slave_map
 - earlyprintk support for palmchip uart on mach-tango
 - delay timer support for orion
 
 Other:
 - Exynos PMU driver moved out to drivers/soc/
 - Various smaller updates for Renesas, Xilinx, PXA, AT91, OMAP, uniphier
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Merge tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC platform updates from Arnd Bergmann:
 "Newly added support for additional SoCs:
   - Axis Artpec-6 SoC family
   - Allwinner A83T SoC
   - Mediatek MT7623
   - NXP i.MX6QP SoC
   - ST Microelectronics stm32f469 microcontroller

  New features:
   - SMP support for Mediatek mt2701
   - Big-endian support for NXP i.MX
   - DaVinci now uses the new DMA engine dma_slave_map
   - OMAP now uses the new DMA engine dma_slave_map
   - earlyprintk support for palmchip uart on mach-tango
   - delay timer support for orion

  Other:
   - Exynos PMU driver moved out to drivers/soc/
   - Various smaller updates for Renesas, Xilinx, PXA, AT91, OMAP,
     uniphier"

* tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (83 commits)
  ARM: uniphier: rework SMP code to support new System Bus binding
  ARM: uniphier: add missing of_node_put()
  ARM: at91: avoid defining CONFIG_* symbols in source code
  ARM: DRA7: hwmod: Add data for eDMA tpcc, tptc0, tptc1
  ARM: imx: Make reset_control_ops const
  ARM: imx: Do L2 errata only if the L2 cache isn't enabled
  ARM: imx: select ARM_CPU_SUSPEND only for imx6
  dmaengine: pxa_dma: fix the maximum requestor line
  ARM: alpine: select the Alpine MSI controller driver
  ARM: pxa: add the number of DMA requestor lines
  dmaengine: mmp-pdma: add number of requestors
  dma: mmp_pdma: Add the #dma-requests DT property documentation
  ARM: OMAP2+: Add rtc hwmod configuration for ti81xx
  ARM: s3c24xx: Avoid warning for inb/outb
  ARM: zynq: Move early printk virtual address to vmalloc area
  ARM: DRA7: hwmod: Add custom reset handler for PCIeSS
  ARM: SAMSUNG: Remove unused register offset definition
  ARM: EXYNOS: Cleanup header files inclusion
  drivers: soc: samsung: Enable COMPILE_TEST
  MAINTAINERS: Add maintainers entry for drivers/soc/samsung
  ...
 2016-03-20 14:57:08 -07:00
Linus Torvalds
e88fa1b8b0 ARM: SoC cleanups for v4.6 
A few simple cleanups across multiple platforms, not much standing out:
 
 - lpc32xx removes its private implementation of the clk API, after
   generic code was merged in 4.5
 - all unused Makefile.boot files get removed
 - a number of simplifications for shmobile
 - asm/clkdev.h gets replaced with the asm-generic version after
   all mach/clkdev.h implementations are gone
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Merge tag 'armsoc-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC cleanups from Arnd Bergmann:
 "A few simple cleanups across multiple platforms, not much standing
  out:

   - lpc32xx removes its private implementation of the clk API, after
     generic code was merged in 4.5
   - all unused Makefile.boot files get removed
   - a number of simplifications for shmobile
   - asm/clkdev.h gets replaced with the asm-generic version after all
     mach/clkdev.h implementations are gone"

* tag 'armsoc-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  ARM: shmobile: Kconfig: Get rid of old comment
  ARM: shmobile: Consolidate SCU mapping code
  arm: lpc32xx: remove direct control of GPIOs from shared mach file
  arm: lpc32xx: remove selected HAVE_IDE
  arm: lpc32xx: switch to common clock framework
  ARM: Use generic clkdev.h header
  ARM: plat-versatile: Remove unused clock.c file
  ARM: netx: remove redundant "depends on ARCH_NETX"
  ARM: integrator: remove redundant select in Kconfig
  ARM: drop unused Makefile.boot of Multiplatform SoCs
  ARM: mvebu: add missing of_node_put()
  ARM: shmobile: r8a7779: Remove remainings of removed SCU boot setup code
  ARM: shmobile: Typo s/MIPDR/MPIDR/
  ARM: shmobile: Add includes providing forward declarations
  ARM: shmobile: rcar-gen2: Make rcar_gen2_dma_contiguous static
  ARM: mv78xx0: use "depends on" instead of "if" after prompt
 2016-03-20 14:37:22 -07:00
Linus Torvalds
dae0b74eb7 ARM: SoC non-urgent fixes for v4.6 
As usual, we queue up a few fixes that don't seem urgent enough to go in
 through -rc.
 
  - a number of randconfig warning fixes from Arnd
  - various small fixes for OMAP
  - one somewhat larger patch to restore the OMAP3 cpuidle
    tuning that was lost in a cleanup
  - a small regression fix for cns3xxx PCI
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Merge tag 'armsoc-fixes-nc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC non-urgent fixes from Arnd Bergmann:
 "As usual, we queue up a few fixes that don't seem urgent enough to go
  in through -rc.

   - a number of randconfig warning fixes from Arnd
   - various small fixes for OMAP
   - one somewhat larger patch to restore the OMAP3 cpuidle tuning that
     was lost in a cleanup
   - a small regression fix for cns3xxx PCI"

* tag 'armsoc-fixes-nc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (26 commits)
  CNS3xxx: Fix PCI cns3xxx_write_config()
  MAINTAINERS: unify email addrs for Kevin Hilman
  CNS3xxx: remove unused *_VIRT definitions
  ARM: OMAP2+: Fix hwmod clock for l4_ls
  soc: TI knav_qmss: fix dma_addr_t printing
  ARM: prima2: always enable reset controller
  ARM: socfpga: hide unused functions
  ARM: ux500: fix ureachable iounmap()
  ARM: ks8695: fix __initdata annotation
  ARM: mvebu: mark mvebu_hwcc_pci_nb as __maybe_unused
  ARM: mv78xx0: avoid unused function warning
  ARM: orion: only select I2C_BOARDINFO when using I2C
  ARM: OMAP2+: Fix out of range register access with syscon_config.max_register
  ARM: OMAP3: Add cpuidle parameters table for omap3430
  ARM: davinci: make I2C support optional
  ARM: davinci: DA8xx+DMx combined kernels need PATCH_PHYS_VIRT
  ARM: davinci: avoid unused mityomapl138_pn_info variable
  ARM: davinci: limit DT support to DA850
  ARM: DRA7: hwmod: Add reset data for PCIe
  ARM: DRA7: hwmod: Fix OCP2SCP sysconfig
  ...
 2016-03-20 14:26:57 -07:00
Ard Biesheuvel
142b9e6c9d x86/kallsyms: fix GOLD link failure with new relative kallsyms table format 
Commit 2213e9a66b ("kallsyms: add support for relative offsets in
kallsyms address table") changed the default kallsyms symbol table
format to use relative references rather than absolute addresses.

This reduces the size of the kallsyms symbol table by 50% on 64-bit
architectures, and further reduces the size of the relocation tables
used by relocatable kernels.  Since the memory footprint of the static
kernel image is always much smaller than 4 GB, these relative references
are assumed to be representable in 32 bits, even when the native word
size is 64 bits.

On 64-bit architectures, this obviously only works if the distance
between each relative reference and the chosen anchor point is
representable in 32 bits, and so the table generation code in
scripts/kallsyms.c scans the table for the lowest value that is covered
by the kernel text, and selects it as the anchor point.

However, when using the GOLD linker rather than the default BFD linker
to build the x86_64 kernel, the symbol phys_offset_64, which is the
result of arithmetic defined in the linker script, is emitted as a 'T'
rather than an 'A' type symbol, resulting in scripts/kallsyms.c to
mistake it for a suitable anchor point, even though it is far away from
the actual kernel image in the virtual address space.  This results in
out-of-range warnings from scripts/kallsyms.c and a broken build.

So let's align with the BFD linker, and emit the phys_offset_[32|64]
symbols as absolute symbols explicitly.  Note that the out of range
issue does not exist on 32-bit x86, but this patch changes both symbols
for symmetry.

Reported-by: Markus Trippelsdorf <markus@trippelsdorf.de>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2016-03-20 13:52:37 -07:00
Linus Torvalds
f0691533b7 virtio/vhost: new features, performance improvements, cleanups 
This adds basic polling support for vhost.
 Reworks virtio to optionally use DMA API, fixing it on Xen.
 Balloon stats gained a new entry.
 Using the new napi_alloc_skb speeds up virtio net.
 virtio blk stats can now be read while another VCPU
 us busy inflating or deflating the balloon.
 Plus misc cleanups in various places.
 
 Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

Pull virtio/vhost updates from Michael Tsirkin:
 "New features, performance improvements, cleanups:

   - basic polling support for vhost
   - rework virtio to optionally use DMA API, fixing it on Xen
   - balloon stats gained a new entry
   - using the new napi_alloc_skb speeds up virtio net
   - virtio blk stats can now be read while another VCPU is busy
     inflating or deflating the balloon

  plus misc cleanups in various places"

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  virtio_net: replace netdev_alloc_skb_ip_align() with napi_alloc_skb()
  vhost_net: basic polling support
  vhost: introduce vhost_vq_avail_empty()
  vhost: introduce vhost_has_work()
  virtio_balloon: Allow to resize and update the balloon stats in parallel
  virtio_balloon: Use a workqueue instead of "vballoon" kthread
  virtio/s390: size of SET_IND payload
  virtio/s390: use dev_to_virtio
  vhost: rename vhost_init_used()
  vhost: rename cross-endian helpers
  virtio_blk: VIRTIO_BLK_F_WCE->VIRTIO_BLK_F_FLUSH
  vring: Use the DMA API on Xen
  virtio_pci: Use the DMA API if enabled
  virtio_mmio: Use the DMA API if enabled
  virtio: Add improved queue allocation API
  virtio_ring: Support DMA APIs
  vring: Introduce vring_use_dma_api()
  s390/dma: Allow per device dma ops
  alpha/dma: use common noop dma ops
  dma: Provide simple noop dma ops
 2016-03-20 13:28:18 -07:00