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Author SHA1 Message Date
Linus Torvalds
d6dd50e07c Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull RCU updates from Ingo Molnar:
 "The main changes in this cycle were:

   - changes related to No-CBs CPUs and NO_HZ_FULL

   - RCU-tasks implementation

   - torture-test updates

   - miscellaneous fixes

   - locktorture updates

   - RCU documentation updates"

* 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (81 commits)
  workqueue: Use cond_resched_rcu_qs macro
  workqueue: Add quiescent state between work items
  locktorture: Cleanup header usage
  locktorture: Cannot hold read and write lock
  locktorture: Fix __acquire annotation for spinlock irq
  locktorture: Support rwlocks
  rcu: Eliminate deadlock between CPU hotplug and expedited grace periods
  locktorture: Document boot/module parameters
  rcutorture: Rename rcutorture_runnable parameter
  locktorture: Add test scenario for rwsem_lock
  locktorture: Add test scenario for mutex_lock
  locktorture: Make torture scripting account for new _runnable name
  locktorture: Introduce torture context
  locktorture: Support rwsems
  locktorture: Add infrastructure for torturing read locks
  torture: Address race in module cleanup
  locktorture: Make statistics generic
  locktorture: Teach about lock debugging
  locktorture: Support mutexes
  locktorture: Add documentation
  ...
 2014-10-13 15:44:12 +02:00
Linus Torvalds
5ff0b9e1a1 xfs: update for 3.18-rc1 
This update contains:
 o various cleanups
 o log recovery debug hooks
 o seek hole/data implementation merge
 o extent shift rework to fix collapse range bugs
 o various sparse warning fixes
 o log recovery transaction processing rework to fix use after free bugs
 o metadata buffer IO infrastructuer rework to ensure all buffers under IO have
   valid reference counts
 o various fixes for ondisk flags, writeback and zero range corner cases
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Merge tag 'xfs-for-linus-3.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc/linux-xfs

Pull xfs update from Dave Chinner:
 "This update contains:
   - various cleanups
   - log recovery debug hooks
   - seek hole/data implementation merge
   - extent shift rework to fix collapse range bugs
   - various sparse warning fixes
   - log recovery transaction processing rework to fix use after free
     bugs
   - metadata buffer IO infrastructuer rework to ensure all buffers
     under IO have valid reference counts
   - various fixes for ondisk flags, writeback and zero range corner
     cases"

* tag 'xfs-for-linus-3.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc/linux-xfs: (56 commits)
  xfs: fix agno increment in xfs_inumbers() loop
  xfs: xfs_iflush_done checks the wrong log item callback
  xfs: flush the range before zero range conversion
  xfs: restore buffer_head unwritten bit on ioend cancel
  xfs: check for null dquot in xfs_quota_calc_throttle()
  xfs: fix crc field handling in xfs_sb_to/from_disk
  xfs: don't send null bp to xfs_trans_brelse()
  xfs: check for inode size overflow in xfs_new_eof()
  xfs: only set extent size hint when asked
  xfs: project id inheritance is a directory only flag
  xfs: kill time.h
  xfs: compat_xfs_bstat does not have forkoff
  xfs: simplify xfs_zero_remaining_bytes
  xfs: check xfs_buf_read_uncached returns correctly
  xfs: introduce xfs_buf_submit[_wait]
  xfs: kill xfs_bioerror_relse
  xfs: xfs_bioerror can die.
  xfs: kill xfs_bdstrat_cb
  xfs: rework xfs_buf_bio_endio error handling
  xfs: xfs_buf_ioend and xfs_buf_iodone_work duplicate functionality
  ...
 2014-10-13 12:06:54 +02:00
Linus Torvalds
77c688ac87 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 
Pull vfs updates from Al Viro:
 "The big thing in this pile is Eric's unmount-on-rmdir series; we
  finally have everything we need for that.  The final piece of prereqs
  is delayed mntput() - now filesystem shutdown always happens on
  shallow stack.

  Other than that, we have several new primitives for iov_iter (Matt
  Wilcox, culled from his XIP-related series) pushing the conversion to
  ->read_iter()/ ->write_iter() a bit more, a bunch of fs/dcache.c
  cleanups and fixes (including the external name refcounting, which
  gives consistent behaviour of d_move() wrt procfs symlinks for long
  and short names alike) and assorted cleanups and fixes all over the
  place.

  This is just the first pile; there's a lot of stuff from various
  people that ought to go in this window.  Starting with
  unionmount/overlayfs mess...  ;-/"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (60 commits)
  fs/file_table.c: Update alloc_file() comment
  vfs: Deduplicate code shared by xattr system calls operating on paths
  reiserfs: remove pointless forward declaration of struct nameidata
  don't need that forward declaration of struct nameidata in dcache.h anymore
  take dname_external() into fs/dcache.c
  let path_init() failures treated the same way as subsequent link_path_walk()
  fix misuses of f_count() in ppp and netlink
  ncpfs: use list_for_each_entry() for d_subdirs walk
  vfs: move getname() from callers to do_mount()
  gfs2_atomic_open(): skip lookups on hashed dentry
  [infiniband] remove pointless assignments
  gadgetfs: saner API for gadgetfs_create_file()
  f_fs: saner API for ffs_sb_create_file()
  jfs: don't hash direct inode
  [s390] remove pointless assignment of ->f_op in vmlogrdr ->open()
  ecryptfs: ->f_op is never NULL
  android: ->f_op is never NULL
  nouveau: __iomem misannotations
  missing annotation in fs/file.c
  fs: namespace: suppress 'may be used uninitialized' warnings
  ...
 2014-10-13 11:28:42 +02:00
Dave Chinner
6889e783cd Merge branch 'xfs-misc-fixes-for-3.18-3' into for-next 2014-10-13 10:22:45 +11:00
Eric Sandeen
a8b1ee8baf xfs: fix agno increment in xfs_inumbers() loop 
caused a regression in xfs_inumbers, which in turn broke
xfsdump, causing incomplete dumps.

The loop in xfs_inumbers() needs to fill the user-supplied
buffers, and iterates via xfs_btree_increment, reading new
ags as needed.

But the first time through the loop, if xfs_btree_increment()
succeeds, we continue, which triggers the ++agno at the bottom
of the loop, and we skip to soon to the next ag - without
the proper setup under next_ag to read the next ag.

Fix this by removing the agno increment from the loop conditional,
and only increment agno if we have actually hit the code under
the next_ag: target.

Cc: stable@vger.kernel.org
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
 2014-10-13 10:21:53 +11:00
Eric Biggers
a457606a6f fs/file_table.c: Update alloc_file() comment 
This comment is 5 years outdated; init_file() no longer exists.

Signed-off-by: Eric Biggers <ebiggers3@gmail.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2014-10-12 17:09:10 -04:00
Eric Biggers
8cc431165d vfs: Deduplicate code shared by xattr system calls operating on paths 
The following pairs of system calls dealing with extended attributes only
differ in their behavior on whether the symbolic link is followed (when
the named file is a symbolic link):

- setxattr() and lsetxattr()
- getxattr() and lgetxattr()
- listxattr() and llistxattr()
- removexattr() and lremovexattr()

Despite this, the implementations all had duplicated code, so this commit
redirects each of the above pairs of system calls to a corresponding
function to which different lookup flags (LOOKUP_FOLLOW or 0) are passed.

For me this reduced the stripped size of xattr.o from 8824 to 8248 bytes.

Signed-off-by: Eric Biggers <ebiggers3@gmail.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2014-10-12 17:09:10 -04:00
Al Viro
50b220bbe7 reiserfs: remove pointless forward declaration of struct nameidata 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2014-10-12 17:09:07 -04:00
Al Viro
7b600f2abb don't need that forward declaration of struct nameidata in dcache.h anymore 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2014-10-12 17:09:06 -04:00
Al Viro
810bb17267 take dname_external() into fs/dcache.c 
never used outside and it's too low-level for legitimate uses outside
of fs/dcache.c anyway

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2014-10-12 17:09:05 -04:00
Al Viro
115cbfdc60 let path_init() failures treated the same way as subsequent link_path_walk() 
As it is, path_lookupat() and path_mounpoint() might end up leaking struct file
reference in some cases.

Spotted-by: Eric Biggers <ebiggers3@gmail.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2014-10-12 17:09:04 -04:00
Linus Torvalds
5e40d331bd Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 
Pull security subsystem updates from James Morris.

Mostly ima, selinux, smack and key handling updates.

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (65 commits)
  integrity: do zero padding of the key id
  KEYS: output last portion of fingerprint in /proc/keys
  KEYS: strip 'id:' from ca_keyid
  KEYS: use swapped SKID for performing partial matching
  KEYS: Restore partial ID matching functionality for asymmetric keys
  X.509: If available, use the raw subjKeyId to form the key description
  KEYS: handle error code encoded in pointer
  selinux: normalize audit log formatting
  selinux: cleanup error reporting in selinux_nlmsg_perm()
  KEYS: Check hex2bin()'s return when generating an asymmetric key ID
  ima: detect violations for mmaped files
  ima: fix race condition on ima_rdwr_violation_check and process_measurement
  ima: added ima_policy_flag variable
  ima: return an error code from ima_add_boot_aggregate()
  ima: provide 'ima_appraise=log' kernel option
  ima: move keyring initialization to ima_init()
  PKCS#7: Handle PKCS#7 messages that contain no X.509 certs
  PKCS#7: Better handling of unsupported crypto
  KEYS: Overhaul key identification when searching for asymmetric keys
  KEYS: Implement binary asymmetric key ID handling
  ...
 2014-10-12 10:13:55 -04:00
Linus Torvalds
d0ca47575a Merge branch 'parisc-3.18-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux 
Pull parisc fix from Helge Deller:
 "This patch intentionally breaks the ABI on PARISC Linux!

  It assigns new numbers to SIGSTKFLT, SIGXCPU, SIGXFSZ and SIGSYS so
  that those are below 32 and thus leaves us with 32 RT signals like
  other Linux architectures (SIGRTMIN now becomes 32 instead of 37).

  Even if it breaks the ABI, it doesn't seem to have any visible impact
  on existing userspace applications.  I was able to mix new kernel
  and/or glibc without impacting normal bootup.  So, even if it breaks
  the ABI, the benefits (e.g.  being able to use systemd on PARISC
  Linux) outperforms the minimal (if any) impact it gives.

  The patch has been discussed on the parisc kernel mailing list and the
  coresponding glibc patch will be committed by the parisc glibc
  maintainer after this patch went into 3.18.

  Some more background information about this patch is in the commit
  message"

[ Side note: the "no regressions" rule has always been about *users*,
  not ABI's.  You can change ABI's all you like, until somebody actually
  notices.  At that point it gets reverted regardless of how good your
  reasons and excuses.

  And admittedly, with parisc, the distinct lack of many users makes
  that fairly unlikely anyway :^p    - Linus ]

* 'parisc-3.18-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: Reduce SIGRTMIN from 37 to 32 to behave like other Linux architectures
 2014-10-12 09:33:42 -04:00
Linus Torvalds
4ee9f61129 platform-drivers-x86 for 3.18 
dell-wmi: Fix access out of memory
 eeepc-laptop: Cleanups, refactoring, sysfs perms, and improved error handling
 intel-rst: ACPI and error handling cleanups
 thinkpad-acpi: Whitespace cleanup
 toshiba_acpi: HCI/SCI interface update, keyboard backlight type 2 support,
               new scancodes, cleanups
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Merge tag 'platform-drivers-x86-v3.18-1' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86

Pull x86 platform driver updates from Darren Hart:
 "The following have all spent at least a few days in linux-next, most
  for more than a week.  These are mostly cleanups and error handling
  improvements with a few updates to extend existing support to newer
  hardware.

  Details:
   - dell-wmi: fix access out of memory
   - eeepc-laptop: cleanups, refactoring, sysfs perms, and improved
     error handling
   - intel-rst: ACPI and error handling cleanups
   - thinkpad-acpi: whitespace cleanup
   - toshiba_acpi: HCI/SCI interface update, keyboard backlight type 2
     support, new scancodes, cleanups"

* tag 'platform-drivers-x86-v3.18-1' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86: (23 commits)
  toshiba_acpi: Adapt kbd_bl_timeout_store to the new kbd type
  toshiba_acpi: Change HCI/SCI functions return code type
  toshiba_acpi: Unify return codes prefix from HCI/SCI to TOS
  toshiba_acpi: Rename hci_raw to tci_raw
  dell-wmi: Fix access out of memory
  eeepc-laptop: clean up control flow in *_rfkill_notifier
  eeepc-laptop: store_cpufv: return error if set_acpi fails
  eeepc-laptop: check proper return values in get_cpufv
  eeepc-laptop: make fan1_input really read-only
  eeepc-laptop: pull out SENSOR_STORE_FUNC and SENSOR_SHOW_FUNC macros
  eeepc-laptop: tell sysfs that the disp attribute is write-only
  eeepc-laptop: pull out ACPI_STORE_FUNC and ACPI_SHOW_FUNC macros
  eeepc-laptop: use DEVICE_ATTR* to instantiate device_attributes
  eeepc-laptop: change sysfs function names to API expectations
  eeepc-laptop: clean up coding style
  eeepc-laptop: simplify parse_arg()
  intel-rst: Clean up ACPI add function
  intel-rst: Use ACPI_FAILURE() macro instead !ACPI_SUCCESS() for error checking
  x86: thinkpad_acpi.c: fixed spacing coding style issue
  toshiba_acpi: Support new keyboard backlight type
  ...
 2014-10-12 09:30:38 -04:00
Linus Torvalds
ce254b34da Fixup for 3.18: use PATCHv2 of "mm: Support compiling out madvise and fadvise" 
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Merge tag 'tiny/no-advice-fixup-3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/josh/linux

Pull tinification fix from Josh "Paper Bag" Triplett:
 "Fixup to use PATCHv2 of 'mm: Support compiling out madvise and
  fadvise'"

* tag 'tiny/no-advice-fixup-3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/josh/linux:
  mm: Support fadvise without CONFIG_MMU
 2014-10-12 09:21:57 -04:00
Linus Torvalds
47e0de1a74 kselftest Updates for 3.18 
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Merge tag 'kselftest-3.18-updates-1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

Pull kselftest updates from Shuah Khan:
 - fix for missing arguments to printf
 - fix to build failures on 32-bit systems.
 - enhancement to run memfd_test run on all architectures as most
   architectures support __NR_memfd_create

* tag 'kselftest-3.18-updates-1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  selftests/memfd: Run test on all architectures
  memfd_test: Add missing argument to printf()
  memfd_test: Make it work on 32-bit systems
 2014-10-12 09:16:43 -04:00
Linus Torvalds
90eac7eee2 This patch series starts a new selftests section in the 
tools/testing/selftest directory called "ftrace" that holds tests
 aimed at testing ftrace and subsystems that use ftrace (like kprobes).
 
 So far only a few tests were written (by Masami Hiramatsu), but more will
 be added in the near future (3.19).
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Merge tag 'ftracetest-3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull ftrace test code from Steven Rostedt:
 "This patch series starts a new selftests section in the
  tools/testing/selftest directory called "ftrace" that holds tests
  aimed at testing ftrace and subsystems that use ftrace (like kprobes).

  So far only a few tests were written (by Masami Hiramatsu), but more
  will be added in the near future (3.19)"

* tag 'ftracetest-3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing/kprobes: Add selftest scripts testing kprobe-tracer as startup test
  ftracetest: Add POSIX.3 standard and XFAIL result codes
  ftracetest: Add kprobe basic testcases
  ftracetest: Add ftrace basic testcases
  ftracetest: Initial commit for ftracetest
 2014-10-12 07:33:37 -04:00
Linus Torvalds
6bbcb1d3a2 A fix and a clean up to ktest, as well as two small features. 
A way to allow users to skip a manual bisect.
  Allowing cherry picked patches to be tested.
 
 The cherry pick worked for a test I needed, but stressing it may
 not have all the desired effects. It doesn't cause any regressions
 so I kept it in.
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Merge tag 'ktest-v3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-ktest

Pull ktest update from Steven Rostedt:
 "A fix and a clean up to ktest, as well as two small features.

   - A way to allow users to skip a manual bisect.
   - Allowing cherry picked patches to be tested.

  The cherry pick worked for a test I needed, but stressing it may not
  have all the desired effects.  It doesn't cause any regressions so I
  kept it in"

* tag 'ktest-v3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-ktest:
  ktest: Don't bother with bisect good or bad on replay
  ktest: Fix check for new kernel success on rebooting to good kernel
  ktest: add ability to skip during BISECT_MANUAL
  ktest: Add PATCHCHECK_CHERRY
 2014-10-12 07:32:26 -04:00
Linus Torvalds
8df6be116c Seems that Peter Zijlstra added a new check that is making old 
code screem nasty warnings:
 
 WARNING: CPU: 0 PID: 91 at kernel/sched/core.c:7253 __might_sleep+0x9a/0x378()
 do not call blocking ops when !TASK_RUNNING; state=1 set at [<ffffffff8d79b511>] event_test_thread+0x48/0x93
 Modules linked in:
 CPU: 0 PID: 91 Comm: test-events Not tainted 3.17.0-rc7-00109-g2f85d18 #37
 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014
  0000000000000000 ffff880010ec3c80 ffffffff8c696943 ffff880010ec3cb8
  ffffffff8be7cae5 ffffffff8bead236 0000000000000001 ffff88001161fa01
  0000000000000001 0000000000000000 ffff880010ec3d20 ffffffff8be7cb46
 Call Trace:
  [<ffffffff8c696943>] dump_stack+0x19/0x1b
  [<ffffffff8be7cae5>] warn_slowpath_common+0x8f/0xa8
  [<ffffffff8bead236>] ? __might_sleep+0x9a/0x378
  [<ffffffff8be7cb46>] warn_slowpath_fmt+0x48/0x50
  [<ffffffff8be0dd55>] ? sched_clock+0x9/0xd
  [<ffffffff8d79b511>] ? event_test_thread+0x48/0x93
  [<ffffffff8d79b511>] ? event_test_thread+0x48/0x93
  [<ffffffff8bead236>] __might_sleep+0x9a/0x378
  [<ffffffff8c6a0227>] down_read+0x26/0x98
  [<ffffffff8be8f503>] exit_signals+0x27/0x1c2
  [<ffffffff8be7fedd>] do_exit+0x193/0x10bd
  [<ffffffff8bfd1969>] ? kfree+0x4a0/0x4d7
  [<ffffffff8d79b4c9>] ? event_trace_self_tests+0x6d7/0x6d7
  [<ffffffff8d79b4c9>] ? event_trace_self_tests+0x6d7/0x6d7
  [<ffffffff8bea4b65>] kthread+0x156/0x156
  [<ffffffff8c69c0f8>] ? wait_for_common+0x3e/0x224
  [<ffffffff8bea4a0f>] ? insert_kthread_work+0xe7/0xe7
  [<ffffffff8c6a353a>] ret_from_fork+0x7a/0xb0
  [<ffffffff8bea4a0f>] ? insert_kthread_work+0xe7/0xe7
 ---[ end trace 14d02ef17adbc114 ]---
 
 These are triggered by some self tests that run at start up when
 configure in. Although the code is technically correct, they are a little
 sloppy and not very robust. They work now because it runs at boot up
 and the tests do not call anything that might trigger a spurious
 wake up. But that doesn't mean those tests wont change in the future.
 
 It's best to clean them now to make sure the tests used to test the
 internal workings of the system don't cause breakage themselves.
 
 This also quiets the warnings made by the new checks.
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Merge tag 'trace-3.18-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull tracing fixes from Steven Rostedt:
 "Seems that Peter Zijlstra added a new check that is making old code
  scream nasty warnings:

    WARNING: CPU: 0 PID: 91 at kernel/sched/core.c:7253 __might_sleep+0x9a/0x378()
    do not call blocking ops when !TASK_RUNNING; state=1 set at [<ffffffff8d79b511>] event_test_thread+0x48/0x93
    Call Trace:
      __might_sleep+0x9a/0x378
      down_read+0x26/0x98
      exit_signals+0x27/0x1c2
      do_exit+0x193/0x10bd
      kthread+0x156/0x156
      ret_from_fork+0x7a/0xb0

  These are triggered by some self tests that run at start up when
  configure in.  Although the code is technically correct, they are a
  little sloppy and not very robust.  They work now because it runs at
  boot up and the tests do not call anything that might trigger a
  spurious wake up.  But that doesn't mean those tests wont change in
  the future.

  It's best to clean them now to make sure the tests used to test the
  internal workings of the system don't cause breakage themselves.

  This also quiets the warnings made by the new checks"

* tag 'trace-3.18-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing: Clean up scheduling in trace_wakeup_test_thread()
  tracing: Robustify wait loop
 2014-10-12 07:28:55 -04:00
Linus Torvalds
9837acff77 This set has a few minor updates, but the big change is the redesign 
of the trampoline logic.
 
 The trampoline logic of 3.17 required a descriptor for every function
 that is registered to be traced and uses a trampoline. Currently,
 only the function graph tracer uses a trampoline, but if you were
 to trace all 32,000 (give or take a few thousand) functions with the
 function graph tracer, it would create 32,000 descriptors to let us
 know that there's a trampoline associated with it. This takes up a bit
 of memory when there's a better way to do it.
 
 The redesign now reuses the ftrace_ops' (what registers the function graph
 tracer) hash tables. The hash tables tell ftrace what the tracer
 wants to trace or doesn't want to trace. There's two of them: one
 that tells us what to trace, the other tells us what not to trace.
 If the first one is empty, it means all functions should be traced,
 otherwise only the ones that are listed should be. The second hash table
 tells us what not to trace, and if it is empty, all functions may be
 traced, and if there's any listed, then those should not be traced
 even if they exist in the first hash table.
 
 It took a bit of massaging, but now these hashes can be used to
 keep track of what has a trampoline and what does not, and allows
 the ftrace accounting to work. Now we can trace all functions when using
 the function graph trampoline, and avoid needing to create any special
 descriptors to hold all the functions that are being traced.
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Merge tag 'trace-3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull tracing updates from Steven Rostedt:
 "This set has a few minor updates, but the big change is the redesign
  of the trampoline logic.

  The trampoline logic of 3.17 required a descriptor for every function
  that is registered to be traced and uses a trampoline.  Currently,
  only the function graph tracer uses a trampoline, but if you were to
  trace all 32,000 (give or take a few thousand) functions with the
  function graph tracer, it would create 32,000 descriptors to let us
  know that there's a trampoline associated with it.  This takes up a
  bit of memory when there's a better way to do it.

  The redesign now reuses the ftrace_ops' (what registers the function
  graph tracer) hash tables.  The hash tables tell ftrace what the
  tracer wants to trace or doesn't want to trace.  There's two of them:
  one that tells us what to trace, the other tells us what not to trace.
  If the first one is empty, it means all functions should be traced,
  otherwise only the ones that are listed should be.  The second hash
  table tells us what not to trace, and if it is empty, all functions
  may be traced, and if there's any listed, then those should not be
  traced even if they exist in the first hash table.

  It took a bit of massaging, but now these hashes can be used to keep
  track of what has a trampoline and what does not, and allows the
  ftrace accounting to work.  Now we can trace all functions when using
  the function graph trampoline, and avoid needing to create any special
  descriptors to hold all the functions that are being traced"

* tag 'trace-3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  ftrace: Only disable ftrace_enabled to test buffer in selftest
  ftrace: Add sanity check when unregistering last ftrace_ops
  kernel: trace_syscalls: Replace rcu_assign_pointer() with RCU_INIT_POINTER()
  tracing: generate RCU warnings even when tracepoints are disabled
  ftrace: Replace tramp_hash with old_*_hash to save space
  ftrace: Annotate the ops operation on update
  ftrace: Grab any ops for a rec for enabled_functions output
  ftrace: Remove freeing of old_hash from ftrace_hash_move()
  ftrace: Set callback to ftrace_stub when no ops are registered
  ftrace: Add helper function ftrace_ops_get_func()
  ftrace: Add separate function for non recursive callbacks
 2014-10-12 07:27:19 -04:00
Helge Deller
1f25df2eff parisc: Reduce SIGRTMIN from 37 to 32 to behave like other Linux architectures 
This patch reduces the value of SIGRTMIN on PARISC from 37 to 32, thus
increasing the number of available RT signals and bring it in sync with other
Linux architectures.

Historically we wanted to natively support HP-UX 32bit binaries with the
PA-RISC Linux port.  Because of that we carried the various available signals
from HP-UX (e.g. SIGEMT and SIGLOST) and folded them in between the native
Linux signals.  Although this was the right decision at that time, this
required us to increase SIGRTMIN to at least 37 which left us with 27 (64-37)
RT signals.

Those 27 RT signals haven't been a problem in the past, but with the upcoming
importance of systemd we now got the problem that systemd alloctes (hardcoded)
signals up to SIGRTMIN+29 which is beyond our NSIG of 64. Because of that we
have not been able to use systemd on the PARISC Linux port yet.

Of course we could ask the systemd developers to not use those hardcoded
values, but this change is very unlikely, esp. with PA-RISC being a niche
architecture.

The other possibility would be to increase NSIG to e.g. 128, but this would
mean to duplicate most of the existing Linux signal handling code into the
parisc specific Linux kernel tree which would most likely introduce lots of new
bugs beside the code duplication.

The third option is to drop some HP-UX signals and shuffle some other signals
around to bring SIGRTMIN to 32.  This is of course an ABI change, but testing
has shown that existing Linux installations are not visibly affected by this
change - most likely because we move those signals around which are rarely used
and move them to slots which haven't been used in Linux yet. In an existing
installation I was able to exchange either the Linux kernel or glibc (or both)
without affecting the boot process and installed applications.

Dropping the HP-UX signals isn't an issue either, since support for HP-UX was
basically dropped a few months back with Kernel 3.14 in commit
f5a408d53e already, when we changed EWOULDBLOCK
to be equal to EAGAIN.

So, even if this is an ABI change, it's better to change it now and thus bring
PARISC Linux in sync with other architectures to avoid other issues in the
future.

Signed-off-by: Helge Deller <deller@gmx.de>
Cc: Carlos O'Donell <carlos@systemhalted.org>
Cc: John David Anglin <dave.anglin@bell.net>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: PARISC Linux Kernel Mailinglist <linux-parisc@vger.kernel.org>
Tested-by: Aaro Koskinen <aaro.koskinen@iki.fi>
 2014-10-12 11:44:25 +02:00
Linus Torvalds
ca321885b0 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 
Pull networking fixes from David Miller:
 "This set fixes a bunch of fallout from the changes that went in during
  this merge window, particularly:

   - Fix fsl_pq_mdio (Claudiu Manoil) and fm10k (Pranith Kumar) build
     failures.

   - Several networking drivers do atomic_set() on page counts where
     that's not exactly legal.  From Eric Dumazet.

   - Make __skb_flow_get_ports() work cleanly with unaligned data, from
     Alexander Duyck.

   - Fix some kernel-doc buglets in rfkill and netlabel, from Fabian
     Frederick.

   - Unbalanced enable_irq_wake usage in bcmgenet and systemport
     drivers, from Florian Fainelli.

   - pxa168_eth needs to depend on HAS_DMA, from Geert Uytterhoeven.

   - Multi-dequeue in the qdisc layer severely bypasses the fairness
     limits the previous code used to enforce, reintroduce in a way that
     at the same time doesn't compromise bulk dequeue opportunities.
     From Jesper Dangaard Brouer.

   - macvlan receive path unnecessarily hops through a softirq by using
     netif_rx() instead of netif_receive_skb().  From Jason Baron"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (51 commits)
  net: systemport: avoid unbalanced enable_irq_wake calls
  net: bcmgenet: avoid unbalanced enable_irq_wake calls
  net: bcmgenet: fix off-by-one in incrementing read pointer
  net: fix races in page->_count manipulation
  mlx4: fix race accessing page->_count
  ixgbe: fix race accessing page->_count
  igb: fix race accessing page->_count
  fm10k: fix race accessing page->_count
  net/phy: micrel: Add clock support for KSZ8021/KSZ8031
  flow-dissector: Fix alignment issue in __skb_flow_get_ports
  net: filter: fix the comments
  Documentation: replace __sk_run_filter with __bpf_prog_run
  macvlan: optimize the receive path
  macvlan: pass 'bool' type to macvlan_count_rx()
  drivers: net: xgene: Add 10GbE ethtool support
  drivers: net: xgene: Add 10GbE support
  drivers: net: xgene: Preparing for adding 10GbE support
  dtb: Add 10GbE node to APM X-Gene SoC device tree
  Documentation: dts: Update section header for APM X-Gene
  MAINTAINERS: Update APM X-Gene section
  ...
 2014-10-11 21:19:00 -04:00
Linus Torvalds
052db7ec86 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc 
Pull sparc updates from David Miller:

 1) Move to 4-level page tables on sparc64 and support up to 53-bits of
    physical addressing.  Kernel static image BSS size reduced by
    several megabytes.

 2) M6/M7 cpu support, from Allan Pais.

 3) Move to sparse IRQs, handle hypervisor TLB call errors more
    gracefully, and add T5 perf_event support.  From Bob Picco.

 4) Recognize cdroms and compute geometry from capacity in virtual disk
    driver, also from Allan Pais.

 5) Fix memset() return value on sparc32, from Andreas Larsson.

 6) Respect gfp flags in dma_alloc_coherent on sparc32, from Daniel
    Hellstrom.

 7) Fix handling of compound pages in virtual disk driver, from Dwight
    Engen.

 8) Fix lockdep warnings in LDC layer by moving IRQ requesting to
    ldc_alloc() from ldc_bind().

 9) Increase boot string length to 1024 bytes, from Dave Kleikamp.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc: (31 commits)
  sparc64: Fix lockdep warnings on reboot on Ultra-5
  sparc64: Increase size of boot string to 1024 bytes
  sparc64: Kill unnecessary tables and increase MAX_BANKS.
  sparc64: sparse irq
  sparc64: Adjust vmalloc region size based upon available virtual address bits.
  sparc64: Increase MAX_PHYS_ADDRESS_BITS to 53.
  sparc64: Use kernel page tables for vmemmap.
  sparc64: Fix physical memory management regressions with large max_phys_bits.
  sparc64: Adjust KTSB assembler to support larger physical addresses.
  sparc64: Define VA hole at run time, rather than at compile time.
  sparc64: Switch to 4-level page tables.
  sparc64: Fix reversed start/end in flush_tlb_kernel_range()
  sparc64: Add vio_set_intr() to enable/disable Rx interrupts
  vio: fix reuse of vio_dring slot
  sunvdc: limit each sg segment to a page
  sunvdc: compute vdisk geometry from capacity
  sunvdc: add cdrom and v1.1 protocol support
  sparc: VIO protocol version 1.6
  sparc64: Fix hibernation code refrence to PAGE_OFFSET.
  sparc64: Move request_irq() from ldc_bind() to ldc_alloc()
  ...
 2014-10-11 20:36:34 -04:00
Linus Torvalds
fd9879b9bb Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux 
Pull powerpc updates from Michael Ellerman:
 "Here's a first pull request for powerpc updates for 3.18.

  The bulk of the additions are for the "cxl" driver, for IBM's Coherent
  Accelerator Processor Interface (CAPI).  Most of it's in drivers/misc,
  which Greg & Arnd maintain, Greg said he was happy for us to take it
  through our tree.

  There's the usual minor cleanups and fixes, including a bit of noise
  in drivers from some of those.  A bunch of updates to our EEH code,
  which has been getting more testing.  Several nice speedups from
  Anton, including 20% in clear_page().

  And a bunch of updates for freescale from Scott"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux: (130 commits)
  cxl: Fix afu_read() not doing finish_wait() on signal or non-blocking
  cxl: Add documentation for userspace APIs
  cxl: Add driver to Kbuild and Makefiles
  cxl: Add userspace header file
  cxl: Driver code for powernv PCIe based cards for userspace access
  cxl: Add base builtin support
  powerpc/mm: Add hooks for cxl
  powerpc/opal: Add PHB to cxl mode call
  powerpc/mm: Add new hash_page_mm()
  powerpc/powerpc: Add new PCIe functions for allocating cxl interrupts
  cxl: Add new header for call backs and structs
  powerpc/powernv: Split out set MSI IRQ chip code
  powerpc/mm: Export mmu_kernel_ssize and mmu_linear_psize
  powerpc/msi: Improve IRQ bitmap allocator
  powerpc/cell: Make spu_flush_all_slbs() generic
  powerpc/cell: Move data segment faulting code out of cell platform
  powerpc/cell: Move spu_handle_mm_fault() out of cell platform
  powerpc/pseries: Use new defines when calling H_SET_MODE
  powerpc: Update contact info in Documentation files
  powerpc/perf/hv-24x7: Simplify catalog_read()
  ...
 2014-10-11 20:34:00 -04:00
Linus Torvalds
81ae31d782 xen: features and fixes for 3.18-rc0 
- Add pvscsi frontend and backend drivers.
 - Remove _PAGE_IOMAP PTE flag, freeing it for alternate uses.
 - Try and keep memory contiguous during PV memory setup (reduces
   SWIOTLB usage).
 - Allow front/back drivers to use threaded irqs.
 - Support large initrds in PV guests.
 - Fix PVH guests in preparation for Xen 4.5
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Merge tag 'stable/for-linus-3.18-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull Xen updates from David Vrabel:
 "Features and fixes:

   - Add pvscsi frontend and backend drivers.
   - Remove _PAGE_IOMAP PTE flag, freeing it for alternate uses.
   - Try and keep memory contiguous during PV memory setup (reduces
     SWIOTLB usage).
   - Allow front/back drivers to use threaded irqs.
   - Support large initrds in PV guests.
   - Fix PVH guests in preparation for Xen 4.5"

* tag 'stable/for-linus-3.18-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: (22 commits)
  xen: remove DEFINE_XENBUS_DRIVER() macro
  xen/xenbus: Remove BUG_ON() when error string trucated
  xen/xenbus: Correct the comments for xenbus_grant_ring()
  x86/xen: Set EFER.NX and EFER.SCE in PVH guests
  xen: eliminate scalability issues from initrd handling
  xen: sync some headers with xen tree
  xen: make pvscsi frontend dependant on xenbus frontend
  arm{,64}/xen: Remove "EXPERIMENTAL" in the description of the Xen options
  xen-scsifront: don't deadlock if the ring becomes full
  x86: remove the Xen-specific _PAGE_IOMAP PTE flag
  x86/xen: do not use _PAGE_IOMAP PTE flag for I/O mappings
  x86: skip check for spurious faults for non-present faults
  xen/efi: Directly include needed headers
  xen-scsiback: clean up a type issue in scsiback_make_tpg()
  xen-scsifront: use GFP_ATOMIC under spin_lock
  MAINTAINERS: Add xen pvscsi maintainer
  xen-scsiback: Add Xen PV SCSI backend driver
  xen-scsifront: Add Xen PV SCSI frontend driver
  xen: Add Xen pvSCSI protocol description
  xen/events: support threaded irqs for interdomain event channels
  ...
 2014-10-11 20:29:01 -04:00
Linus Torvalds
ef4a48c513 File locking related changes for v3.18 (pile #1) 
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Merge tag 'locks-v3.18-1' of git://git.samba.org/jlayton/linux

Pull file locking related changes from Jeff Layton:
 "This release is a little more busy for file locking changes than the
  last:

   - a set of patches from Kinglong Mee to fix the lockowner handling in
     knfsd
   - a pile of cleanups to the internal file lease API.  This should get
     us a bit closer to allowing for setlease methods that can block.

  There are some dependencies between mine and Bruce's trees this cycle,
  and I based my tree on top of the requisite patches in Bruce's tree"

* tag 'locks-v3.18-1' of git://git.samba.org/jlayton/linux: (26 commits)
  locks: fix fcntl_setlease/getlease return when !CONFIG_FILE_LOCKING
  locks: flock_make_lock should return a struct file_lock (or PTR_ERR)
  locks: set fl_owner for leases to filp instead of current->files
  locks: give lm_break a return value
  locks: __break_lease cleanup in preparation of allowing direct removal of leases
  locks: remove i_have_this_lease check from __break_lease
  locks: move freeing of leases outside of i_lock
  locks: move i_lock acquisition into generic_*_lease handlers
  locks: define a lm_setup handler for leases
  locks: plumb a "priv" pointer into the setlease routines
  nfsd: don't keep a pointer to the lease in nfs4_file
  locks: clean up vfs_setlease kerneldoc comments
  locks: generic_delete_lease doesn't need a file_lock at all
  nfsd: fix potential lease memory leak in nfs4_setlease
  locks: close potential race in lease_get_mtime
  security: make security_file_set_fowner, f_setown and __f_setown void return
  locks: consolidate "nolease" routines
  locks: remove lock_may_read and lock_may_write
  lockd: rip out deferred lock handling from testlock codepath
  NFSD: Get reference of lockowner when coping file_lock
  ...
 2014-10-11 13:21:34 -04:00
Linus Torvalds
90d0c376f5 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs 
Pull btrfs updates from Chris Mason:
 "The largest set of changes here come from Miao Xie.  He's cleaning up
  and improving read recovery/repair for raid, and has a number of
  related fixes.

  I've merged another set of fsync fixes from Filipe, and he's also
  improved the way we handle metadata write errors to make sure we force
  the FS readonly if things go wrong.

  Otherwise we have a collection of fixes and cleanups.  Dave Sterba
  gets a cookie for removing the most lines (thanks Dave)"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: (139 commits)
  btrfs: Fix compile error when CONFIG_SECURITY is not set.
  Btrfs: fix compiles when CONFIG_BTRFS_FS_RUN_SANITY_TESTS is off
  btrfs: Make btrfs handle security mount options internally to avoid losing security label.
  Btrfs: send, don't delay dir move if there's a new parent inode
  btrfs: add more superblock checks
  Btrfs: fix race in WAIT_SYNC ioctl
  Btrfs: be aware of btree inode write errors to avoid fs corruption
  Btrfs: remove redundant btrfs_verify_qgroup_counts declaration.
  btrfs: fix shadow warning on cmp
  Btrfs: fix compilation errors under DEBUG
  Btrfs: fix crash of btrfs_release_extent_buffer_page
  Btrfs: add missing end_page_writeback on submit_extent_page failure
  btrfs: Fix the wrong condition judgment about subset extent map
  Btrfs: fix build_backref_tree issue with multiple shared blocks
  Btrfs: cleanup error handling in build_backref_tree
  btrfs: move checks for DUMMY_ROOT into a helper
  btrfs: new define for the inline extent data start
  btrfs: kill extent_buffer_page helper
  btrfs: drop constant param from btrfs_release_extent_buffer_page
  btrfs: hide typecast to definition of BTRFS_SEND_TRANS_STUB
  ...
 2014-10-11 08:03:52 -04:00
Linus Torvalds
ac0c49396d 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:
 "A few UDF fixes and also a few patches which are preparing filesystems
  for support of project quotas in VFS"

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  udf: Fix loading of special inodes
  ocfs2: Back out change to use OCFS2_MAXQUOTAS in ocfs2_setattr()
  udf: remove redundant sys_tz declaration
  ocfs2: Don't use MAXQUOTAS value
  reiserfs: Don't use MAXQUOTAS value
  ext3: Don't use MAXQUOTAS value
  udf: Fix race between write(2) and close(2)
 2014-10-11 08:02:31 -04:00
Linus Torvalds
eca9fdf32d Minor code cleanups and a fix for when eCryptfs metadata is stored in xattrs 
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Merge tag 'ecryptfs-3.18-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tyhicks/ecryptfs

Pull eCryptfs updates from Tyler Hicks:
 "Minor code cleanups and a fix for when eCryptfs metadata is stored in
  xattrs"

* tag 'ecryptfs-3.18-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tyhicks/ecryptfs:
  ecryptfs: remove unneeded buggy code in ecryptfs_do_create()
  ecryptfs: avoid to access NULL pointer when write metadata in xattr
  ecryptfs: remove unnecessary break after goto
  ecryptfs: Remove unnecessary include of syscall.h in keystore.c
  fs/ecryptfs/messaging.c: remove null test before kfree
  ecryptfs: Drop cast
  Use %pd in eCryptFS
 2014-10-11 08:01:27 -04:00
Linus Torvalds
41e46ac0fa This time we have a couple of bug fixes, one relating to bad i_goal values 
which are now ignored (i_goal is basically a hint so it is safe to so this)
 and another relating to the saving of the dirent location during rename.
 
 There is one performance improvement, which is an optimisation in rgblk_free
 so that multiple block deallocations will now be more efficient,
 and one clean up patch to use _RET_IP_ rather than writing it out longhand.
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Merge tag 'gfs2-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-3.0-nmw

Pull gfs2 updates from Steven Whitehouse:
 "This time we have a couple of bug fixes, one relating to bad i_goal
  values which are now ignored (i_goal is basically a hint so it is safe
  to so this) and another relating to the saving of the dirent location
  during rename.

  There is one performance improvement, which is an optimisation in
  rgblk_free so that multiple block deallocations will now be more
  efficient, and one clean up patch to use _RET_IP_ rather than writing
  it out longhand"

* tag 'gfs2-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-3.0-nmw:
  GFS2: use _RET_IP_ instead of (unsigned long)__builtin_return_address(0)
  GFS2: Use gfs2_rbm_incr in rgblk_free
  GFS2: Make rename not save dirent location
  GFS2: fix bad inode i_goal values during block allocation
 2014-10-11 08:00:16 -04:00
Linus Torvalds
27a9716bc8 VFIO updates for v3.18-rc1 
- Nested IOMMU extension to type1 (Will Deacon)
  - Restore MSIx message before enabling (Gavin Shan)
  - Fix remove path locking (Alex Williamson)
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Merge tag 'vfio-v3.18-rc1' of git://github.com/awilliam/linux-vfio

Pull VFIO updates from Alex Williamson:
 - Nested IOMMU extension to type1 (Will Deacon)
 - Restore MSIx message before enabling (Gavin Shan)
 - Fix remove path locking (Alex Williamson)

* tag 'vfio-v3.18-rc1' of git://github.com/awilliam/linux-vfio:
  vfio-pci: Fix remove path locking
  drivers/vfio: Export vfio_spapr_iommu_eeh_ioctl() with GPL
  vfio/pci: Restore MSIx message prior to enabling
  PCI: Export MSI message relevant functions
  vfio/iommu_type1: add new VFIO_TYPE1_NESTING_IOMMU IOMMU type
  iommu: introduce domain attribute for nesting IOMMUs
 2014-10-11 06:49:24 -04:00
Linus Torvalds
e98d6e7f76 Devicetree changes for v3.18 
This branch contains bug fixes and new features for the devicetree code.
 Most of the changes are either new testcases for the selftest code or
 documentation changes. The most notable change is the addition of a
 phandle resolver for use when grafting in a second device tree blob into
 the core tree. The resolver isn't currently used by anything other than
 the selftest module, but it will be used to support device tree
 overlays; probably in the v3.19 timeframe.
 
 Also note that I've moved my normal tree from git.secretlab.ca to
 git.kernel.org.
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Merge tag 'devicetree-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/glikely/linux

Pull devicetree changes from Grant Likely:
 "This branch contains bug fixes and new features for the devicetree
  code.

  Most of the changes are either new testcases for the selftest code or
  documentation changes.  The most notable change is the addition of a
  phandle resolver for use when grafting in a second device tree blob
  into the core tree.  The resolver isn't currently used by anything
  other than the selftest module, but it will be used to support device
  tree overlays; probably in the v3.19 timeframe.

  Also note that I've moved my normal tree from git.secretlab.ca to
  git.kernel.org"

* tag 'devicetree-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/glikely/linux:
  of/selftest: Move hash table off stack to fix large frame size
  To remove non-ascii characters in of_selftest.txt
  of/selftest: Use the resolver to fixup phandles
  of: Introduce Device Tree resolve support.
  of/selftest: Add a test for duplicate phandles
  of: Don't try to search when phandle == 0
  of/selftest: Test structure of device tree
  of: Fix NULL dereference in selftest removal code
  of: add vendor prefix for Chipidea
  of: Add vendor prefix for Innolux Corporation
  of: Add vendor prefix for Sitronix
  devicetree: bindings: Document Gateworks vendor prefix
  of: Add vendor prefix for Energy Micro
  dt/documentation: add specification of dma bus information
 2014-10-11 06:47:50 -04:00
Linus Torvalds
4e0b7fe383 Changes to existing drivers 
- Checkpatch fixes
   - Removal of unused code in generic_bl
   - Removal of superfluous .owner attribute
 
 New drivers/supported devices
   - None
 
 (Re-)moved drivers
   - None
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Merge tag 'backlight-for-linus-3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight

Pull backlight driver updates from Lee Jones:
 "Changes to existing drivers:
   - Checkpatch fixes
   - Removal of unused code in generic_bl
   - Removal of superfluous .owner attribute

  No new or removed drivers/supported devices"

* tag 'backlight-for-linus-3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight:
  backlight: omap1: add blank line after declarations
  backlight: jornada720: Remove 'else' after a return
  backlight: jornada720: Remove 'else' after a return
  backlight: wm831x_bl: Add blank line after declarations
  backlight: tdo24m: Add blank line after declarations
  backlight: s6e63m0: Remove 'else' after a return
  backlight: pcf50633: Add blank line after declarations
  backlight: lp855x: Add blank line after declarations
  backlight: lms501kf03: Remove 'else' after a return
  backlight: lm3639: Remove unnecessary return statements
  backlight: ld9040: Remove 'else' after a return
  backlight: ili922x: Remove 'else' after a return
  backlight: cr_bllcd: Add blank line after declarations
  backlight: corgi_lcd: Add blank line after declarations
  backlight: ams369fg06: Remove 'else' after a return
  backlight: adp8870: Add blank line after declarations
  backlight: adp8860: Add blank line after declarations
  backlight: adp5520: Add blank line after declarations
  backlight: generic_bl: Remove unused function
  backlight: Remove .owner field for drivers using module_platform_driver
 2014-10-11 06:38:33 -04:00
Linus Torvalds
f43b179bbd MMC core: 
- Fix SDIO IRQ bug.
  - MMC regulator improvements.
  - Fix slot-gpio card detect bug.
  - Add support for Driver Stage Register.
  - Convert the common MMC OF parser to use GPIO descriptors.
  - Convert MMC_CAP2_NO_MULTI_READ into a callback, ->multi_io_quirk().
  - Some additional minor fixes.
 
 MMC host:
  - mmci: Support Qualcomm specific DML layer for DMA.
  - dw_mmc: Use common MMC regulators.
  - dw_mmc: Add support for Rock-chips RK3288.
  - tmio: Enable runtime PM support.
  - tmio: Add support for R-Car Gen2 SoCs.
  - tmio: Several fixes and improvements.
  - omap_hsmmc: Removed Balaji from MAINTAINERS.
  - jz4740: add DMA and pre/post support.
  - sdhci: Add support for Intel Braswell.
  - sdhci: Several fixes and improvements.
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Merge tag 'mmc-v3.18-1' of git://git.linaro.org/people/ulf.hansson/mmc

Pull MMC updates from Ulf Hansson:
 "MMC core:
   - Fix SDIO IRQ bug
   - MMC regulator improvements
   - Fix slot-gpio card detect bug
   - Add support for Driver Stage Register
   - Convert the common MMC OF parser to use GPIO descriptors
   - Convert MMC_CAP2_NO_MULTI_READ into a callback, ->multi_io_quirk()
   - Some additional minor fixes

  MMC host:
   - mmci: Support Qualcomm specific DML layer for DMA
   - dw_mmc: Use common MMC regulators
   - dw_mmc: Add support for Rock-chips RK3288
   - tmio: Enable runtime PM support
   - tmio: Add support for R-Car Gen2 SoCs
   - tmio: Several fixes and improvements
   - omap_hsmmc: Removed Balaji from MAINTAINERS
   - jz4740: add DMA and pre/post support
   - sdhci: Add support for Intel Braswell
   - sdhci: Several fixes and improvements"

* tag 'mmc-v3.18-1' of git://git.linaro.org/people/ulf.hansson/mmc: (119 commits)
  ARM: dts: fix MMC2 regulators for Exynos5420 Arndale Octa board
  mmc: sdhci-acpi: Fix Braswell eMMC timeout clock frequency
  mmc: sdhci-acpi: Pass HID and UID to probe_slot
  mmc: sdhci-acpi: Get UID directly from acpi_device
  mmc, sdhci, bcm-kona, LLVMLinux: Remove use of __initconst
  mmc: sdhci-pci: Fix Braswell eMMC timeout clock frequency
  mmc: sdhci: Let a driver override timeout clock frequency
  mmc: sdhci-pci: Add Bay Trail and Braswell SD card detect
  mmc: sdhci-pci: Set SDHCI_QUIRK2_STOP_WITH_TC for Intel BYT host controllers
  mmc: sdhci-acpi: Add a HID and UID for a SD Card host controller
  mmc: sdhci-acpi: Set SDHCI_QUIRK2_STOP_WITH_TC for Intel host controllers
  mmc: sdhci: Add quirk for always getting TC with stop cmd
  mmc: core: restore detect line inversion semantics
  mmc: Fix incorrect warning when setting 0 Hz via debugfs
  mmc: Fix use of wrong device in mmc_gpiod_free_cd()
  mmc: atmel-mci: fix mismatched section on atmci_cleanup_slot
  mmc: rtsx_pci: Set power related cap2 macros
  mmc: core: Add new power_mode MMC_POWER_UNDEFINED
  mmc: sdhci: execute tuning when device is not busy
  mmc: atmel-mci: Release mmc resources on failure in probe
  ..
 2014-10-11 06:34:22 -04:00
Linus Torvalds
a2ce35273c sound updates for 3.18-rc1 
This time it's a relatively calm update batch, but the amount isn't
 too small in the end.  Here we go over some highlights:
 
 - ALSA core
   - One major change is the support of nonatomic PCM operations.
     This allows the trigger and other callbacks to call schedule(),
     which would be useful for mailbox type communications.  Already
     some drivers (Digigram ones) have been converted to use together
     with threaded irqs as an example.
   - Improvement / fixes of DSD PCM format support
 
 - HD-audio
   - Large volume of rewrites are found in Realtek codec driver for
     converting Dell and HP quirks to generic forms.
   - Inverted dmic code cleanup from David.
   - Realtek COEF access has been optimized.
   - Now HD-audio jack infrastructure allows multiple callbacks, which
     fixes / simplifies the jack-dependent power controls on STAC/IDT
     and VIA codecs.
   - Many additional device-specific fixups as usual
   - A few deadcode cleanups, CA0132 code cleanup, etc.
 
 - ASoC
   - More componentization work from Lars-Peter, this time mainly
     cleaning up the suspend and bias level transition callbacks.
   - Real system support for the Intel drivers and a bunch of fixes
     and enhancements for the associated CODEC drivers, this is going
     to need a lot quirks over time due to the lack of any firmware
     description of the boards.
   - Jack detect support for simple card from Dylan Reid.
   - A bunch of small fixes and enhancements for the Freescale
     drivers.
   - New drivers for Analog Devices SSM4567, Cirrus Logic CS35L32,
     Everest Semiconductor ES8328 and Freescale cards using the ASRC
     in newer i.MX processors.
   - A few simple-card fixes, mostly cleanups but also a fix for
   - interaction between GPIO 0 and simple-card.
 
 - Misc
   - Virtuoso / Oxygen updates by Clemens
   - USB-audio: Yamaha MOTIF XF MIDI port name fixes
   - Conversion of kernel messages to standard dev_*() in ctxfi
     driver.
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Merge tag 'sound-3.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

Pull sound updates from Takashi Iwai:
 "This time it's a relatively calm update batch, but the amount isn't
  too small in the end.  Here we go over some highlights:

  ALSA core:
   - One major change is the support of nonatomic PCM operations.  This
     allows the trigger and other callbacks to call schedule(), which
     would be useful for mailbox type communications.  Already some
     drivers (Digigram ones) have been converted to use together with
     threaded irqs as an example.
   - Improvement / fixes of DSD PCM format support

  HD-audio:
   - Large volume of rewrites are found in Realtek codec driver for
     converting Dell and HP quirks to generic forms.
   - Inverted dmic code cleanup from David.
   - Realtek COEF access has been optimized.
   - Now HD-audio jack infrastructure allows multiple callbacks, which
     fixes / simplifies the jack-dependent power controls on STAC/IDT
     and VIA codecs.
   - Many additional device-specific fixups as usual
   - A few deadcode cleanups, CA0132 code cleanup, etc.

  ASoC:
   - More componentization work from Lars-Peter, this time mainly
     cleaning up the suspend and bias level transition callbacks.
   - Real system support for the Intel drivers and a bunch of fixes and
     enhancements for the associated CODEC drivers, this is going to
     need a lot quirks over time due to the lack of any firmware
     description of the boards.
   - Jack detect support for simple card from Dylan Reid.
   - A bunch of small fixes and enhancements for the Freescale drivers.
   - New drivers for Analog Devices SSM4567, Cirrus Logic CS35L32,
     Everest Semiconductor ES8328 and Freescale cards using the ASRC in
     newer i.MX processors.
   - A few simple-card fixes, mostly cleanups but also a fix for
     interaction between GPIO 0 and simple-card.

  Misc:
   - Virtuoso / Oxygen updates by Clemens
   - USB-audio: Yamaha MOTIF XF MIDI port name fixes
   - Conversion of kernel messages to standard dev_*() in ctxfi driver"

* tag 'sound-3.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (251 commits)
  ASoC: mc13783: Ensure we only try to dereference valid of_nodes
  ASoC: rockchip-i2s: fix infinite loop in rockchip_snd_txctrl
  ALSA: hda - Add dock port support to Thinkpad L440 (71aa:501e)
  ALSA: Allow pass NULL dev for snd_pci_quirk_lookup()
  ASoC: imx-es8328: Fix of_node_put() call with uninitialized object
  ASoC: soc-pcm: fix sig_bits determination in soc_pcm_apply_msb()
  ASoC: simple-card: Initialize headphone and mic GPIO numbers
  ASoC: imx-es8328: Fix missing return code in imx_es8328_probe()
  ALSA: hda - Add dock support for Thinkpad T440 (17aa:2212)
  ALSA: usb: caiaq: check for cdev->n_streams > 1
  ASoC: 88pm860x-codec: Fix possibly missing string termination
  ASoC: core: fix use after free in snd_soc_remove_platform()
  ASoC: soc-dapm: fix use after free
  ALSA: hda - Make the inv dmic handling for Realtek use generic parser
  ALSA: hda - Add Inverted Internal mic for Samsung Ativ book 9 (NP900X3G)
  ALSA: hda - Add inverted internal mic for Asus Aspire 4830T
  ASoC: Intel: byt-rt5640: fix coccinelle warnings
  ASoC: fsl_esai doc: Add "fsl,vf610-esai" as compatible string
  ASoC: da732x: Remove unnecessary KERN_ERR in pr_err()
  ASoC: simple-card: Fix detect gpio documentation.
  ...
 2014-10-10 22:13:25 -04:00
Linus Torvalds
bf65dea87e edac updates for v3.18-rc1 
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Merge tag 'edac/v3.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-edac

Pull edac updates from Mauro Carvalho Chehab:
 "Nothing really exiting here: just one bug fix at sb_edac, and some
  changes to allow other drivers to use some shared PCI addresses"

* tag 'edac/v3.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-edac:
  sb_edac: Claim a different PCI device
  Move Intel SNB device ids from sb_edac to pci_ids.h
  sb_edac: avoid INTERNAL ERROR message in EDAC with unspecified channel
 2014-10-10 22:07:55 -04:00
Linus Torvalds
4d9708ea5e media updates for v3.18-rc1 
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Merge tag 'media/v3.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media

Pull media updates from Mauro Carvalho Chehab:

 - new IR driver: hix5hd2-ir

 - the virtual test driver (vivi) was replaced by vivid, with has an
   almost complete set of features to emulate most v4l2 devices and
   properly test all sorts of userspace apps

 - the as102 driver had several bugs fixed and was properly split into a
   frontend and a core driver.  With that, it got promoted from staging
   into mainstream

 - one new CI driver got added for CIMaX SP2/SP2HF (sp2 driver)

 - one new frontend driver for Toshiba ISDB-T/ISDB-S demod (tc90522)

 - one new PCI driver for ISDB-T/ISDB-S (pt3 driver)

 - saa7134 driver got support for go7007-based devices

 - added a new PCI driver for Techwell 68xx chipsets (tw68)

 - a new platform driver was added (coda)

 - new tuner drivers: mxl301rf and qm1d1c0042

 - a new DVB USB driver was added for DVBSky S860 & similar devices

 - added a new SDR driver (hackrf)

 - usbtv got audio support

 - several platform drivers are now compiled with COMPILE_TEST

 - a series of compiler fixup patches, making sparse/spatch happier with
   the media stuff and removing several warnings, especially on those
   platform drivers that didn't use to compile on x86

 - Support for several new modern devices got added

 - lots of other fixes, improvements and cleanups

* tag 'media/v3.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (544 commits)
  [media] ir-hix5hd2: fix build on c6x arch
  [media] pt3: fix DTV FE I2C driver load error paths
  Revert "[media] media: em28xx - remove reset_resume interface"
  [media] exynos4-is: fix some warnings when compiling on arm64
  [media] usb drivers: use %zu instead of %zd
  [media] pci drivers: use %zu instead of %zd
  [media] dvb-frontends: use %zu instead of %zd
  [media] s5p-mfc: Fix several printk warnings
  [media] s5p_mfc_opr: Fix warnings
  [media] ti-vpe: Fix typecast
  [media] s3c-camif: fix dma_addr_t printks
  [media] s5p_mfc_opr_v6: get rid of warnings when compiled with 64 bits
  [media] s5p_mfc_opr_v5: Fix lots of warnings on x86_64
  [media] em28xx: Fix identation
  [media] drxd: remove a dead code
  [media] saa7146: remove return after BUG()
  [media] cx88: remove return after BUG()
  [media] cx88: fix cards table CodingStyle
  [media] radio-sf16fmr2: declare some structs as static
  [media] radio-sf16fmi: declare pnp_attached as static
  ...
 2014-10-10 22:04:49 -04:00
Linus Torvalds
754c780953 Merge branch 'for-v3.18' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping 
Pull dma-mapping update from Marek Szyprowski:
 "Provide the dma write coherent api (available previously on ARM
  architecture) for all other architectures, which use dma_ops-based dma
  mapping implementation.

  This lets one to use the same code in the device drivers regardless of
  the selected architecture"

* 'for-v3.18' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping:
  dma-mapping: Provide write-combine allocations
  s390: Implement dma_{alloc,free}_attrs()
 2014-10-10 16:56:08 -04:00
Linus Torvalds
40c43269cf New driver for menf21bmc. 
Convert k10temp, smsc47b397, da9052, da9055 to new hwmon API.
 Register ntc_thermistor driver with thermal subsystem.
 Add support for F15h M60h to k10temp driver.
 Add driver for MEN14F021P00 BMC HWMON driver; this required a merge
 with tag mfd-hwmon-leds-watchdog-v3.18.
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Merge tag 'hwmon-for-linus-v3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging

Pull hwmon updates from Guenter Roeck:
 - new driver for menf21bmc.
 - convert k10temp, smsc47b397, da9052, da9055 to new hwmon API.
 - register ntc_thermistor driver with thermal subsystem.
 - add support for F15h M60h to k10temp driver.
 - add driver for MEN14F021P00 BMC HWMON driver; this required a merge
   with tag mfd-hwmon-leds-watchdog-v3.18

* tag 'hwmon-for-linus-v3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: (ab8500) Call kernel_power_off instead of pm_power_off
  hwmon: (menf21bmc) Introduce MEN14F021P00 BMC HWMON driver
  leds: leds-menf21bmc: Introduce MEN 14F021P00 BMC LED driver
  watchdog: menf21bmc_wdt: Introduce MEN 14F021P00 BMC Watchdog driver
  mfd: menf21bmc: Introduce MEN 14F021P00 BMC MFD Core driver
  hwmon: (ntc_thermistor) Add ntc thermistor to thermal subsystem as a sensor.
  hwmon: (smsc47b397) Convert to devm_hwmon_device_register_with_groups
  MAINTAINERS: add entry for the PWM fan driver
  hwmon: (k10temp) Convert to devm_hwmon_device_register_with_groups
  hwmon: (k10temp) Add support for F15h M60h
  hwmon: (da9052) Convert to devm_hwmon_device_register_with_groups
  hwmon: (da9055) Convert to devm_hwmon_device_register_with_groups
  hwmon: (ads1015) Use of_property_read_u32 at appropriate places
 2014-10-10 16:40:14 -04:00
Linus Torvalds
93834c6419 Immutable branch with restart handler patches for v3.18 
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Merge tag 'restart-handler-for-v3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging

Pull restart handler infrastructure from Guenter Roeck:
 "This series was supposed to be pulled through various trees using it,
  and I did not plan to send a separate pull request.  As it turns out,
  the pinctrl tree did not merge with it, is now upstream, and uses it,
  meaning there are now build failures.

  Please pull this series directly to fix those build failures"

* tag 'restart-handler-for-v3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  arm/arm64: unexport restart handlers
  watchdog: sunxi: register restart handler with kernel restart handler
  watchdog: alim7101: register restart handler with kernel restart handler
  watchdog: moxart: register restart handler with kernel restart handler
  arm: support restart through restart handler call chain
  arm64: support restart through restart handler call chain
  power/restart: call machine_restart instead of arm_pm_restart
  kernel: add support for kernel restart handler call chain
 2014-10-10 16:38:02 -04:00
Josh Triplett
887e7019e3 mm: Support fadvise without CONFIG_MMU 
Commit d3ac21cacc ("mm: Support compiling
out madvise and fadvise") incorrectly made fadvise conditional on
CONFIG_MMU.  (The merged branch unintentionally incorporated v1 of the
patch rather than the fixed v2.)  Apply the delta from v1 to v2, to
allow fadvise without CONFIG_MMU.

Reported-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Josh Triplett <josh@joshtriplett.org>
 2014-10-10 13:12:28 -07:00
David S. Miller
bdcf81b658 sparc64: Fix lockdep warnings on reboot on Ultra-5 
Inconsistently, the raw_* IRQ routines do not interact with and update
the irqflags tracing and lockdep state, whereas the raw_* spinlock
interfaces do.

This causes problems in p1275_cmd_direct() because we disable hardirqs
by hand using raw_local_irq_restore() and then do a raw_spin_lock()
which triggers a lockdep trace because the CPU's hw IRQ state doesn't
match IRQ tracing's internal software copy of that state.

The CPU's irqs are disabled, yet current->hardirqs_enabled is true.

====================
reboot: Restarting system
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1 at kernel/locking/lockdep.c:3536 check_flags+0x7c/0x240()
DEBUG_LOCKS_WARN_ON(current->hardirqs_enabled)
Modules linked in: openpromfs
CPU: 0 PID: 1 Comm: systemd-shutdow Tainted: G        W      3.17.0-dirty #145
Call Trace:
 [000000000045919c] warn_slowpath_common+0x5c/0xa0
 [0000000000459210] warn_slowpath_fmt+0x30/0x40
 [000000000048f41c] check_flags+0x7c/0x240
 [0000000000493280] lock_acquire+0x20/0x1c0
 [0000000000832b70] _raw_spin_lock+0x30/0x60
 [000000000068f2fc] p1275_cmd_direct+0x1c/0x60
 [000000000068ed28] prom_reboot+0x28/0x40
 [000000000043610c] machine_restart+0x4c/0x80
 [000000000047d2d4] kernel_restart+0x54/0x80
 [000000000047d618] SyS_reboot+0x138/0x200
 [00000000004060b4] linux_sparc_syscall32+0x34/0x60
---[ end trace 5c439fe81c05a100 ]---
possible reason: unannotated irqs-off.
irq event stamp: 2010267
hardirqs last  enabled at (2010267): [<000000000049a358>] vprintk_emit+0x4b8/0x580
hardirqs last disabled at (2010266): [<0000000000499f08>] vprintk_emit+0x68/0x580
softirqs last  enabled at (2010046): [<000000000045d278>] __do_softirq+0x378/0x4a0
softirqs last disabled at (2010039): [<000000000042bf08>] do_softirq_own_stack+0x28/0x40
Resetting ...
====================

Use local_* variables of the hw IRQ interfaces so that IRQ tracing sees
all of our changes.

Reported-by: Meelis Roos <mroos@linux.ee>
Tested-by: Meelis Roos <mroos@linux.ee>
Signed-off-by: David S. Miller <davem@davemloft.net>
 2014-10-10 15:49:16 -04:00
David S. Miller
01d2d484e4 Merge branch 'bcmgenet_systemport' 
Florian Fainelli says:

====================
net: bcmgenet & systemport fixes

This patch series fixes an off-by-one error introduced during a previous
change, and the two other fixes fix a wake depth imbalance situation for
the Wake-on-LAN interrupt line.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
 2014-10-10 15:39:22 -04:00
Florian Fainelli
61b423a8a0 net: systemport: avoid unbalanced enable_irq_wake calls 
Multiple enable_irq_wake() calls will keep increasing the IRQ
wake_depth, which ultimately leads to the following types of
situation:

1) enable Wake-on-LAN interrupt w/o password
2) enable Wake-on-LAN interrupt w/ password
3) enable Wake-on-LAN interrupt w/o password
4) disable Wake-on-LAN interrupt

After step 4), SYSTEMPORT would always wake-up the system no matter what
wake-up device we use, which is not what we want. Fix this by making
sure there are no unbalanced enable_irq_wake() calls.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 2014-10-10 15:39:15 -04:00
Florian Fainelli
083731a8fb net: bcmgenet: avoid unbalanced enable_irq_wake calls 
Multiple enable_irq_wake() calls will keep increasing the IRQ
wake_depth, which ultimately leads to the following types of
situation:

1) enable Wake-on-LAN interrupt w/o password
2) enable Wake-on-LAN interrupt w/ password
3) enable Wake-on-LAN interrupt w/o password
4) disable Wake-on-LAN interrupt

After step 4), GENET would always wake-up the system no matter what
wake-up device we use, which is not what we want. Fix this by making
sure there are no unbalanced enable_irq_wake() calls.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 2014-10-10 15:39:15 -04:00
Florian Fainelli
cf377d886f net: bcmgenet: fix off-by-one in incrementing read pointer 
Commit b629be5c83 ("net: bcmgenet: check
harder for out of memory conditions") moved the increment of the local
read pointer *before* reading from the hardware descriptor using
dmadesc_get_length_status(), which creates an off-by-one situation.

Fix this by moving again the read_ptr increment after we have read the
hardware descriptor to get both the control block and the read pointer
back in sync.

Fixes: b629be5c83 ("net: bcmgenet: check harder for out of memory conditions")
Signed-off-by: Jaedon Shin <jaedon.shin@gmail.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Petri Gynther <pgynther@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 2014-10-10 15:39:15 -04:00
David S. Miller
35b7a1915a Merge branch 'net-drivers-pgcnt' 
Eric Dumazet says:

====================
net: fix races accessing page->_count

This is illegal to use atomic_set(&page->_count, ...) even if we 'own'
the page. Other entities in the kernel need to use get_page_unless_zero()
to get a reference to the page before testing page properties, so we could
loose a refcount increment.

The only case it is valid is when page->_count is 0, we can use this in
__netdev_alloc_frag()

Note that I never seen crashes caused by these races, the issue was reported
by Andres Lagar-Cavilla and Hugh Dickins.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
 2014-10-10 15:37:36 -04:00
Eric Dumazet
4c450583d9 net: fix races in page->_count manipulation 
This is illegal to use atomic_set(&page->_count, ...) even if we 'own'
the page. Other entities in the kernel need to use get_page_unless_zero()
to get a reference to the page before testing page properties, so we could
loose a refcount increment.

The only case it is valid is when page->_count is 0

Fixes: 540eb7bf0b ("net: Update alloc frag to reduce get/put page usage and recycle pages")
Signed-off-by: Eric Dumaze <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 2014-10-10 15:37:29 -04:00
Eric Dumazet
98226208c8 mlx4: fix race accessing page->_count 
This is illegal to use atomic_set(&page->_count, ...) even if we 'own'
the page. Other entities in the kernel need to use get_page_unless_zero()
to get a reference to the page before testing page properties, so we could
loose a refcount increment.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 2014-10-10 15:37:28 -04:00
Eric Dumazet
ec91698360 ixgbe: fix race accessing page->_count 
This is illegal to use atomic_set(&page->_count, 2) even if we 'own'
the page. Other entities in the kernel need to use get_page_unless_zero()
to get a reference to the page before testing page properties, so we could
loose a refcount increment.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 2014-10-10 15:37:28 -04:00