Skip to content
  1. Nov 07, 2011
  3. Nov 06, 2011
  5. Nov 05, 2011
    • Dan McGee's avatar
      VFS: fix statfs() automounter semantics regression · 5c8a0fbb
      Dan McGee authored 
      No one in their right mind would expect statfs() to not work on a
automounter managed mount point. Fix it.

[ I'm not sure about the "no one in their right mind" part.  It's not
  mounted, and you didn't ask for it to be mounted.  But nobody will
  really care, and this probably makes it match previous semantics, so..
      - Linus ]

This mirrors the fix made to the quota code in 815d405c

.

Signed-off-by: default avatarDan McGee <dpmcgee@gmail.com>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: stable@kernel.org
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      5c8a0fbb
    • Linus Torvalds's avatar
      Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dma · fba95699
      Linus Torvalds authored 
      * 'next' of git://git.infradead.org/users/vkoul/slave-dma: (63 commits)
  dmaengine: mid_dma: mask_peripheral_interrupt only when dmac is idle
  dmaengine/ep93xx_dma: add module.h include
  pch_dma: Reduce wasting memory
  pch_dma: Fix suspend issue
  dma/timberdale: free_irq() on an error path
  dma: shdma: transfer based runtime PM
  dmaengine: shdma: protect against the IRQ handler
  dmaengine i.MX DMA/SDMA: add missing include of linux/module.h
  dmaengine: delete redundant chan_id and chancnt initialization in dma drivers
  dmaengine/amba-pl08x: Check txd->llis_va before freeing dma_pool
  dmaengine/amba-pl08x: Add support for sg len greater than one for slave transfers
  serial: sh-sci: don't filter on DMA device, use only channel ID
  ARM: SAMSUNG: Remove Samsung specific enum type for dma direction
  ASoC: Samsung: Update DMA interface
  spi/s3c64xx: Merge dma control code
  spi/s3c64xx: Add support DMA engine API
  ARM: SAMSUNG: Remove S3C-PL330-DMA driver
  ARM: S5P64X0: Use generic DMA PL330 driver
  ARM: S5PC100: Use generic DMA PL330 driver
  ARM: S5PV210: Use generic DMA PL330 driver
  ...

Fix up fairly trivial conflicts in
 - arch/arm/mach-exynos4/{Kconfig,clock.c}
 - arch/arm/mach-s5p64x0/dma.c
      fba95699
    • Linus Torvalds's avatar
      Merge branch 'for-3.2/drivers' of git://git.kernel.dk/linux-block · 3d0a8d10
      Linus Torvalds authored 
      * 'for-3.2/drivers' of git://git.kernel.dk/linux-block: (30 commits)
  virtio-blk: use ida to allocate disk index
  hpsa: add small delay when using PCI Power Management to reset for kump
  cciss: add small delay when using PCI Power Management to reset for kump
  xen/blkback: Fix two races in the handling of barrier requests.
  xen/blkback: Check for proper operation.
  xen/blkback: Fix the inhibition to map pages when discarding sector ranges.
  xen/blkback: Report VBD_WSECT (wr_sect) properly.
  xen/blkback: Support 'feature-barrier' aka old-style BARRIER requests.
  xen-blkfront: plug device number leak in xlblk_init() error path
  xen-blkfront: If no barrier or flush is supported, use invalid operation.
  xen-blkback: use kzalloc() in favor of kmalloc()+memset()
  xen-blkback: fixed indentation and comments
  xen-blkfront: fix a deadlock while handling discard response
  xen-blkfront: Handle discard requests.
  xen-blkback: Implement discard requests ('feature-discard')
  xen-blkfront: add BLKIF_OP_DISCARD and discard request struct
  drivers/block/loop.c: remove unnecessary bdev argument from loop_clr_fd()
  drivers/block/loop.c: emit uevent on auto release
  drivers/block/cpqarray.c: use pci_dev->revision
  loop: always allow userspace partitions and optionally support automatic scanning
  ...

Fic up trivial header file includsion conflict in drivers/block/loop.c
      3d0a8d10
    • Linus Torvalds's avatar
      Merge branch 'for-3.2/core' of git://git.kernel.dk/linux-block · b4fdcb02
      Linus Torvalds authored 
      * 'for-3.2/core' of git://git.kernel.dk/linux-block: (29 commits)
  block: don't call blk_drain_queue() if elevator is not up
  blk-throttle: use queue_is_locked() instead of lockdep_is_held()
  blk-throttle: Take blkcg->lock while traversing blkcg->policy_list
  blk-throttle: Free up policy node associated with deleted rule
  block: warn if tag is greater than real_max_depth.
  block: make gendisk hold a reference to its queue
  blk-flush: move the queue kick into
  blk-flush: fix invalid BUG_ON in blk_insert_flush
  block: Remove the control of complete cpu from bio.
  block: fix a typo in the blk-cgroup.h file
  block: initialize the bounce pool if high memory may be added later
  block: fix request_queue lifetime handling by making blk_queue_cleanup() properly shutdown
  block: drop @tsk from attempt_plug_merge() and explain sync rules
  block: make get_request[_wait]() fail if queue is dead
  block: reorganize throtl_get_tg() and blk_throtl_bio()
  block: reorganize queue draining
  block: drop unnecessary blk_get/put_queue() in scsi_cmd_ioctl() and blk_get_tg()
  block: pass around REQ_* flags instead of broken down booleans during request alloc/free
  block: move blk_throtl prototypes to block/blk.h
  block: fix genhd refcounting in blkio_policy_parse_and_set()
  ...

Fix up trivial conflicts due to "mddev_t" -> "struct mddev" conversion
and making the request functions be of type "void" instead of "int" in
 - drivers/md/{faulty.c,linear.c,md.c,md.h,multipath.c,raid0.c,raid1.c,raid10.c,raid5.c}
 - drivers/staging/zram/zram_drv.c
      b4fdcb02
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/pkl/squashfs-next · 044595d4
      Linus Torvalds authored 
      * git://git.kernel.org/pub/scm/linux/kernel/git/pkl/squashfs-next:
  Squashfs: Add an option to set dev block size to 4K
      044595d4
    • Tejun Heo's avatar
      PM / Freezer: Revert 27920651 "PM / Freezer: Make fake_signal_wake_up() wake... · d6cc7685
      Tejun Heo authored 
      PM / Freezer: Revert 27920651 "PM / Freezer: Make fake_signal_wake_up() wake TASK_KILLABLE tasks too"

Commit 27920651

 "PM / Freezer: Make fake_signal_wake_up() wake
TASK_KILLABLE tasks too" updated fake_signal_wake_up() used by freezer
to wake up KILLABLE tasks.  Sending unsolicited wakeups to tasks in
killable sleep is dangerous as there are code paths which depend on
tasks not waking up spuriously from KILLABLE sleep.

For example. sys_read() or page can sleep in TASK_KILLABLE assuming
that wait/down/whatever _killable can only fail if we can not return
to the usermode.  TASK_TRACED is another obvious example.

The previous patch updated wait_event_freezekillable() such that it
doesn't depend on the spurious wakeup.  This patch reverts the
offending commit.

Note that the spurious KILLABLE wakeup had other implicit effects in
KILLABLE sleeps in nfs and cifs and those will need further updates to
regain freezekillable behavior.

Signed-off-by: default avatarTejun Heo <tj@kernel.org>
Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
      d6cc7685
    • Oleg Nesterov's avatar
      PM / Freezer: Reimplement wait_event_freezekillable using freezer_do_not_count/freezer_count · 6f35c4ab
      Oleg Nesterov authored 
      Commit 27920651 "PM / Freezer: Make fake_signal_wake_up() wake
TASK_KILLABLE tasks too" updated fake_signal_wake_up() used by freezer
to wake up KILLABLE tasks.  Sending unsolicited wakeups to tasks in
killable sleep is dangerous as there are code paths which depend on
tasks not waking up spuriously from KILLABLE sleep.

For example. sys_read() or page can sleep in TASK_KILLABLE assuming
that wait/down/whatever _killable can only fail if we can not return
to the usermode.  TASK_TRACED is another obvious example.

The offending commit was to resolve freezer hang during system PM
operations caused by KILLABLE sleeps in network filesystems.
wait_event_freezekillable(), which depends on the spurious KILLABLE
wakeup, was added by f06ac72e "cifs, freezer: add
wait_event_freezekillable and have cifs use it" to be used to
implement killable & freezable sleeps in network filesystems.

To prepare for reverting of 27920651

, this patch reimplements
wait_event_freezekillable() using freezer_do_not_count/freezer_count()
so that it doesn't depend on the spurious KILLABLE wakeup.  This isn't
very nice but should do for now.

[tj: Refreshed patch to apply to linus/master and updated commit
    description on Rafael's request.]

Signed-off-by: default avatarOleg Nesterov <oleg@redhat.com>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
      6f35c4ab
    • Alan Stern's avatar
      USB: Update last_busy time after autosuspend fails · b2c0a863
      Alan Stern authored 
      Originally, the runtime PM core would send an idle notification
whenever a suspend attempt failed.  The idle callback routine could
then schedule a delayed suspend for some time later.

However this behavior was changed by commit
f71648d7

 (PM / Runtime: Remove idle
notification after failing suspend).  No notifications were sent, and
there was no clear mechanism to retry failed suspends.

This caused problems for the usbhid driver, because it fails
autosuspend attempts as long as a key is being held down.  A companion
patch changes the PM core's behavior, but we also need to change the
USB core.  In particular, this patch (as1493) updates the device's
last_busy time when an autosuspend fails, so that the PM core will
retry the autosuspend in the future when the delay time expires
again.

Signed-off-by: default avatarAlan Stern <stern@rowland.harvard.edu>
Tested-by: default avatarHenrik Rydberg <rydberg@euromail.se>
Cc: <stable@kernel.org>
Acked-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
      b2c0a863
    • Alan Stern's avatar
      PM / Runtime: Automatically retry failed autosuspends · 886486b7
      Alan Stern authored 
      Originally, the runtime PM core would send an idle notification
whenever a suspend attempt failed.  The idle callback routine could
then schedule a delayed suspend for some time later.

However this behavior was changed by commit
f71648d7

 (PM / Runtime: Remove idle
notification after failing suspend).  No notifications were sent, and
there was no clear mechanism to retry failed suspends.

This caused problems for the usbhid driver, because it fails
autosuspend attempts as long as a key is being held down.  Therefore
this patch (as1492) adds a mechanism for retrying failed
autosuspends.  If the callback routine updates the last_busy field so
that the next autosuspend expiration time is in the future, the
autosuspend will automatically be rescheduled.

Signed-off-by: default avatarAlan Stern <stern@rowland.harvard.edu>
Tested-by: default avatarHenrik Rydberg <rydberg@euromail.se>
Cc: <stable@kernel.org>
Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
      886486b7
    • Guennadi Liakhovetski's avatar
      PM / QoS: Remove redundant check · 6513fd69
      Guennadi Liakhovetski authored 
      

Remove an "if" check, that repeats an equivalent one 6 lines above.

Signed-off-by: default avatarGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
      6513fd69
    • Tony Lindgren's avatar
      PM / OPP: Fix build when CONFIG_PM_OPP is not set · a96d69d1
      Tony Lindgren authored 
      Commit 03ca370f

 (PM / OPP: Add
OPP availability change notifier) does not compile if CONFIG_PM_OPP
is not set:

arch/arm/plat-omap/omap-pm-noop.o: In function `opp_get_notifier':
include/linux/opp.h:103: multiple definition of `opp_get_notifier'
include/linux/opp.h:103: first defined here

Also fix incorrect comment.

Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
      a96d69d1
    • venu byravarasu's avatar
      PM / Runtime: Fix runtime accounting calculation error · def0c0a3
      venu byravarasu authored 
      

With delta type being int, its value is made zero
for all values of now > 0x80000000.
Hence fixing it.

Signed-off-by: default avatarvenu byravarasu <vbyravarasu@nvidia.com>
Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
      def0c0a3
    • Srivatsa S. Bhat's avatar
      PM / Sleep: Update freezer documentation · e9db50b8
      Srivatsa S. Bhat authored 
      

This patch:
 * Substitutes some obsolete references to kernel/power/process.c by
   kernel/freezer.c.
 * Mentions kernel/freezer.c as being part of the "freezer" code along
   with the rest of the files.
 * Fixes a trivial typo.

Signed-off-by: default avatarSrivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
      e9db50b8
    • Srivatsa S. Bhat's avatar
      PM / Sleep: Remove unused symbol 'suspend_cpu_hotplug' · 4e71c954
      Srivatsa S. Bhat authored 
      

Remove the suspend_cpu_hotplug declaration, which doesn't correspond
to an existing variable.

[rjw: Added the changelog.]

Signed-off-by: default avatarSrivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
      4e71c954
    • Srivatsa S. Bhat's avatar
      PM / Sleep: Fix race between CPU hotplug and freezer · 79cfbdfa
      Srivatsa S. Bhat authored 
      

The CPU hotplug notifications sent out by the _cpu_up() and _cpu_down()
functions depend on the value of the 'tasks_frozen' argument passed to them
(which indicates whether tasks have been frozen or not).
(Examples for such CPU hotplug notifications: CPU_ONLINE, CPU_ONLINE_FROZEN,
CPU_DEAD, CPU_DEAD_FROZEN).

Thus, it is essential that while the callbacks for those notifications are
running, the state of the system with respect to the tasks being frozen or
not remains unchanged, *throughout that duration*. Hence there is a need for
synchronizing the CPU hotplug code with the freezer subsystem.

Since the freezer is involved only in the Suspend/Hibernate call paths, this
patch hooks the CPU hotplug code to the suspend/hibernate notifiers
PM_[SUSPEND|HIBERNATE]_PREPARE and PM_POST_[SUSPEND|HIBERNATE] to prevent
the race between CPU hotplug and freezer, thus ensuring that CPU hotplug
notifications will always be run with the state of the system really being
what the notifications indicate, _throughout_ their execution time.

Signed-off-by: default avatarSrivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
      79cfbdfa
    • Dave Jones's avatar
      ACPI / PM: Add Sony VPCEB17FX to nonvs blacklist · ddf6ce45
      Dave Jones authored 
      Another entry for the nonvs blacklist, as noted by a user in
https://bugzilla.redhat.com/show_bug.cgi?id=641789#c12



Signed-off-by: default avatarDave Jones <davej@redhat.com>
Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
      ddf6ce45
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://github.com/cmetcalf-tilera/linux-tile · 15831714
      Linus Torvalds authored 
      * 'for-linus' of git://github.com/cmetcalf-tilera/linux-tile:
  arch/tile: factor out <arch/opcode.h> header
  arch/tile: add the <arch> headers to the set of installed kernel headers
  arch/tile: avoid exporting a symbol no longer used by gcc
  arch/tile: avoid ISO namespace pollution with <asm/sigcontext.h>
      15831714
    • Linus Torvalds's avatar
      Merge branch 'nfs-for-3.2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs · 6736c047
      Linus Torvalds authored 
      * 'nfs-for-3.2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (25 commits)
  nfs: set vs_hidden on nfs4_callback_version4 (try #2)
  pnfs-obj: Support for RAID5 read-4-write interface.
  pnfs-obj: move to ore 03: Remove old raid engine
  pnfs-obj: move to ore 02: move to ORE
  pnfs-obj: move to ore 01: ore_layout & ore_components
  pnfs-obj: Rename objlayout_io_state => objlayout_io_res
  pnfs-obj: Get rid of objlayout_{alloc,free}_io_state
  pnfs-obj: Return PNFS_NOT_ATTEMPTED in case of read/write_pagelist
  pnfs-obj: Remove redundant EOF from objlayout_io_state
  nfs: Remove unused variable from write.c
  nfs: Fix unused variable warning from file.c
  NFS: Remove no-op less-than-zero checks on unsigned variables.
  NFS: Clean up nfs4_xdr_dec_secinfo()
  NFS: Fix documenting comment for nfs_create_request()
  NFS4: fix cb_recallany decode error
  nfs4: serialize layoutcommit
  SUNRPC: remove rpcbind clients destruction on module cleanup
  SUNRPC: remove rpcbind clients creation during service registering
  NFSd: call svc rpcbind cleanup explicitly
  SUNRPC: cleanup service destruction
  ...
      6736c047
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband · 16dfd1fa
      Linus Torvalds authored 
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband:
  IB/qib: Fix panic in RC error flushing logic
  IB/iser: DMA unmap TX bufs used for iSCSI/iSER headers
  IB/iser: Use separate buffers for the login request/response
  IB/mthca: Fix buddy->num_free allocation size
      16dfd1fa