]> git.openfabrics.org - ~shefty/rdma-dev.git/log
~shefty/rdma-dev.git
11 years agoALSA: oxygen - Add a SSID for CMI8787-HG2PCI
Takashi Iwai [Wed, 6 Oct 2010 15:28:56 +0000 (17:28 +0200)]
ALSA: oxygen - Add a SSID for CMI8787-HG2PCI

This board has a strange PCI SSID 13f6:ffff.  Works as compabile as
MODEL_CMEDIA_REF.

Reported-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
11 years agoALSA: oxygen: add PEX8111 initialization
Clemens Ladisch [Wed, 6 Oct 2010 08:58:50 +0000 (10:58 +0200)]
ALSA: oxygen: add PEX8111 initialization

Configure the PEX8111 bridge on the PCI Express cards so that the audio
DMA controller can do proper burst reads and is less likely to lose
data.  This is usually done automatically, but is required on older
cards where the user has not applied the PLX firmware update.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
11 years agoALSA: oxygen: rewrite PCIe bridge initialization
Clemens Ladisch [Wed, 6 Oct 2010 08:57:50 +0000 (10:57 +0200)]
ALSA: oxygen: rewrite PCIe bridge initialization

Change the PCIe/PCI bridge initialization code to configure only the
bridge that is actually connected to the sound chip, instead of any
bridge found in the system.  The new code also makes it easier to add
other bridges.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
11 years agoALSA: oxygen: reduce minimum period count
Clemens Ladisch [Wed, 6 Oct 2010 08:57:11 +0000 (10:57 +0200)]
ALSA: oxygen: reduce minimum period count

The interrupt counter is independent of the buffer counter, so there are
no restrictions on the period size.  Having fewer periods also makes
PulseAudio happy.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
11 years agoALSA: oxygen: fix input monitor dB scale
Clemens Ladisch [Mon, 4 Oct 2010 11:25:13 +0000 (13:25 +0200)]
ALSA: oxygen: fix input monitor dB scale

The input monitor half volume bit results in a factor of 0.5, so the
minimum scale value should be -6 dB.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
11 years agoALSA: oxygen: fix chip ID register symbols
Clemens Ladisch [Mon, 4 Oct 2010 11:24:43 +0000 (13:24 +0200)]
ALSA: oxygen: fix chip ID register symbols

Rename the symbol for the XCID pins, fix up a decimal/hex confusion for
the CMI8787 package ID, and add the other known package IDs.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
11 years agoALSA: virtuoso: fix Xonar STX anti-pop delay
Clemens Ladisch [Mon, 4 Oct 2010 11:23:26 +0000 (13:23 +0200)]
ALSA: virtuoso: fix Xonar STX anti-pop delay

The anti-pop delay for the STX should be 800 ms, not 100 ms like the ST.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
11 years agoALSA: virtuoso: add HDAV1.3 Slim PCI ID
Clemens Ladisch [Mon, 4 Oct 2010 11:22:51 +0000 (13:22 +0200)]
ALSA: virtuoso: add HDAV1.3 Slim PCI ID

Add a PCI ID for the Xonar HDAV1.3 Slim.  There is no actual support,
but the presence of the ID allows the EEPROM repair code to work for
this card.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
11 years agoALSA: oxygen: handle CD input configuration with a flag
Clemens Ladisch [Mon, 4 Oct 2010 11:21:52 +0000 (13:21 +0200)]
ALSA: oxygen: handle CD input configuration with a flag

There are more models without a CD input than with one, so handle this
explicitly with a device_config flag to avoid having to define a control
filter callback to filter it out.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
11 years agoALSA: virtuoso: fix Xonar DS chip name
Clemens Ladisch [Mon, 4 Oct 2010 11:17:26 +0000 (13:17 +0200)]
ALSA: virtuoso: fix Xonar DS chip name

The controller on the Xonar DS is labeled "AV66", not "AV200".

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
11 years agoALSA: usb-audio: add more Yamaha USB MIDI devices
Clemens Ladisch [Mon, 4 Oct 2010 11:09:12 +0000 (13:09 +0200)]
ALSA: usb-audio: add more Yamaha USB MIDI devices

Add quirks for more devices (according to driver V.3.0.4-2).

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
11 years agoMerge remote branch 'alsa/devel' into topic/misc
Takashi Iwai [Mon, 4 Oct 2010 06:46:38 +0000 (08:46 +0200)]
Merge remote branch 'alsa/devel' into topic/misc

11 years agoALSA: snd-aloop - fix "PCM Slave Active" element read value
Jaroslav Kysela [Sat, 2 Oct 2010 14:00:53 +0000 (16:00 +0200)]
ALSA: snd-aloop - fix "PCM Slave Active" element read value

Simple coding fix.

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
11 years agoMerge remote branch 'alsa/devel' into topic/misc
Takashi Iwai [Thu, 30 Sep 2010 06:42:14 +0000 (08:42 +0200)]
Merge remote branch 'alsa/devel' into topic/misc

11 years agoALSA: snd-aloop - fix capture buffer silence
Jaroslav Kysela [Wed, 29 Sep 2010 22:16:50 +0000 (00:16 +0200)]
ALSA: snd-aloop - fix capture buffer silence

In a special case, some old samples are left in the capture ring buffer.
Fix it.

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
11 years agoSOUND-OSS: Remove sh_dac_audio
John Kacur [Wed, 22 Sep 2010 11:47:01 +0000 (13:47 +0200)]
SOUND-OSS: Remove sh_dac_audio

Remove the SH DAC oss driver since there is an equivalent alsa driver.
oss has been deprecated for years. Furthermore this driver has BKL code
which we are trying to remove. Rather than attempt to fix this, simply
remove the driver.

Signed-off-by: John Kacur <jkacur@redhat.com>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
11 years agoMerge remote branch 'alsa/devel' into topic/misc
Takashi Iwai [Wed, 22 Sep 2010 08:03:28 +0000 (10:03 +0200)]
Merge remote branch 'alsa/devel' into topic/misc

11 years agoALSA: usb/mixer: remove bogus cast
Dan Carpenter [Thu, 16 Sep 2010 18:13:47 +0000 (20:13 +0200)]
ALSA: usb/mixer: remove bogus cast

"uinfo->value.enumerated.item" is an unsigned int.  If it's negative
when we do the comparison:
if ((int)uinfo->value.enumerated.item >= cval->max)
then we would read past the end of the array on the next line.

I also changed the strcpy() to strlcpy() out of paranoia.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
11 years agoALSA: core: Allow card id change to the same string
Peter Ujfalusi [Thu, 16 Sep 2010 07:26:54 +0000 (10:26 +0300)]
ALSA: core: Allow card id change to the same string

When user want to change the card id to the same string
on the card via /sys/class/sound/cardX/id, do not
report error. Instead return with success without
doing anything.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
11 years agoALSA: usb-audio - Fix an unused-variable compile warning
Takashi Iwai [Thu, 16 Sep 2010 05:42:34 +0000 (07:42 +0200)]
ALSA: usb-audio - Fix an unused-variable compile warning

Used only when CONFIG_SND_DEBUG=y
  sound/usb/mixer.c: In function 'get_min_max':
  sound/usb/mixer.c:762: warning: unused variable 'chip'

Reported-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
11 years agoALSA: snd-aloop - fix the "PCM Playback Channels" kcontrol
Jaroslav Kysela [Wed, 15 Sep 2010 06:01:57 +0000 (08:01 +0200)]
ALSA: snd-aloop - fix the "PCM Playback Channels" kcontrol

Obvious copy-and-paste error.

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
11 years agosound: autoconvert trivial BKL users to private mutex
Arnd Bergmann [Tue, 14 Sep 2010 19:53:41 +0000 (21:53 +0200)]
sound: autoconvert trivial BKL users to private mutex

The usage of the BKL in the OSS sound drivers is
trivial, and each of them only locks against itself,
so it can be turned into per-driver mutexes.

This is the script that was used for the conversion:

file=$1
name=$2
if grep -q lock_kernel ${file} ; then
    if grep -q 'include.*linux.mutex.h' ${file} ; then
            sed -i '/include.*<linux\/smp_lock.h>/d' ${file}
    else
            sed -i 's/include.*<linux\/smp_lock.h>.*$/include <linux\/mutex.h>/g' ${file}
    fi
    sed -i ${file} \
        -e "/^#include.*linux.mutex.h/,$ {
                1,/^\(static\|int\|long\)/ {
                     /^\(static\|int\|long\)/istatic DEFINE_MUTEX(${name}_mutex);

} }"  \
    -e "s/\(un\)*lock_kernel\>[ ]*()/mutex_\1lock(\&${name}_mutex)/g" \
    -e '/[      ]*cycle_kernel_lock();/d'
else
    sed -i -e '/include.*\<smp_lock.h\>/d' ${file}  \
                -e '/cycle_kernel_lock()/d'
fi

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
11 years agoALSA: sound/ppc/powermac: remove undefined operations
Andreas Schwab [Sat, 11 Sep 2010 11:16:41 +0000 (13:16 +0200)]
ALSA: sound/ppc/powermac: remove undefined operations

Modifying an object twice without an intervening sequence point is
undefined.

Signed-off-by: Andreas Schwab <schwab@linux-m68k.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
11 years agoALSA: emux: Add trivial compat ioctl handler
Ben Hutchings [Sun, 12 Sep 2010 01:41:47 +0000 (02:41 +0100)]
ALSA: emux: Add trivial compat ioctl handler

Reported-by: Carmen Cru <carmen.cru@belgacom.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
11 years agosound: Use static const char * const where possible
Joe Perches [Tue, 14 Sep 2010 04:24:02 +0000 (21:24 -0700)]
sound: Use static const char * const where possible

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
11 years agoMerge branch 'fix/misc' into topic/misc
Takashi Iwai [Tue, 14 Sep 2010 14:15:29 +0000 (16:15 +0200)]
Merge branch 'fix/misc' into topic/misc

11 years agosound: Remove pr_<level> uses of KERN_<level>
Joe Perches [Sun, 12 Sep 2010 05:10:59 +0000 (22:10 -0700)]
sound: Remove pr_<level> uses of KERN_<level>

Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Geoff Levand <geoff@infradead.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
11 years agoLinux 2.6.36-rc4 v2.6.36-rc4
Linus Torvalds [Sun, 12 Sep 2010 23:07:37 +0000 (16:07 -0700)]
Linux 2.6.36-rc4

11 years agodocbook: skip files with no docs since they generate scary warnings
Randy Dunlap [Sat, 11 Sep 2010 22:55:26 +0000 (15:55 -0700)]
docbook: skip files with no docs since they generate scary warnings

Fix docbook templates that reference files that do not contain the
expected kernel-doc notation.

Fixes these warnings:

  Warning(arch/x86/include/asm/unaligned.h): no structured comments found
  Warning(lib/vsprintf.c): no structured comments found

These cause errors in the generated html output, like below, so drop
these lines.

  Name
  arch/x86/include/asm/unaligned.h - Document generation inconsistency
  Oops
  Warning
  The template for this document tried to insert the structured comment from the file arch/x86/include/asm/unaligned.h at this point, but none was found. This dummy section is inserted to allow generation to continue.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agodocbook: warn on unused doc entries
Johannes Berg [Sat, 11 Sep 2010 22:55:22 +0000 (15:55 -0700)]
docbook: warn on unused doc entries

When you don't use !E or !I but only !F, then it's very easy to miss
including some functions, structs etc.  in documentation.  To help
finding which ones were missed, allow printing out the unused ones as
warnings.

For example, using this on mac80211 yields a lot of warnings like this:

  Warning: didn't use docs for DOC: mac80211 workqueue
  Warning: didn't use docs for ieee80211_max_queues
  Warning: didn't use docs for ieee80211_bss_change
  Warning: didn't use docs for ieee80211_bss_conf

when generating the documentation for it.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agokernel-doc: ignore case when stripping attributes
Johannes Berg [Sat, 11 Sep 2010 22:55:12 +0000 (15:55 -0700)]
kernel-doc: ignore case when stripping attributes

There are valid attributes that could have upper case letters, but we
still want to remove, like for example
__attribute__((aligned(NETDEV_ALIGN)))
as encountered in the wireless code.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agoMerge branch 'pm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspe...
Linus Torvalds [Sat, 11 Sep 2010 22:50:53 +0000 (15:50 -0700)]
Merge branch 'pm-fixes' of git://git./linux/kernel/git/rafael/suspend-2.6

* 'pm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6:
  PM / Hibernate: Avoid hitting OOM during preallocation of memory
  PM QoS: Correct pr_debug() misuse and improve parameter checks
  PM: Prevent waiting forever on asynchronous resume after failing suspend

11 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6
Linus Torvalds [Sat, 11 Sep 2010 19:17:02 +0000 (12:17 -0700)]
Merge git://git./linux/kernel/git/jejb/scsi-rc-fixes-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6:
  [SCSI] fix use-after-free in scsi_init_io()
  [SCSI] sd: fix medium-removal bug
  [SCSI] qla2xxx: Update version number to 8.03.04-k0.
  [SCSI] qla2xxx: Check for empty slot in request queue before posting Command type 6 request.
  [SCSI] qla2xxx: Cover UNDERRUN case where SCSI status is set.
  [SCSI] qla2xxx: Correctly set fw hung and complete only waiting mbx.
  [SCSI] qla2xxx: Reset seconds_since_last_heartbeat correctly.
  [SCSI] qla2xxx: make rport deletions explicit during vport removal
  [SCSI] qla2xxx: Fix vport delete issues
  [SCSI] sd, sym53c8xx: Remove warnings after vsprintf %pV introducation.
  [SCSI] Fix warning: zero-length gnu_printf format string
  [SCSI] hpsa: disable doorbell reset on reset_devices
  [SCSI] be2iscsi: Fix for Login failure
  [SCSI] fix bio.bi_rw handling

11 years agoPM / Hibernate: Avoid hitting OOM during preallocation of memory
Rafael J. Wysocki [Sat, 11 Sep 2010 18:58:27 +0000 (20:58 +0200)]
PM / Hibernate: Avoid hitting OOM during preallocation of memory

There is a problem in hibernate_preallocate_memory() that it calls
preallocate_image_memory() with an argument that may be greater than
the total number of available non-highmem memory pages.  If that's
the case, the OOM condition is guaranteed to trigger, which in turn
can cause significant slowdown to occur during hibernation.

To avoid that, make preallocate_image_memory() adjust its argument
before calling preallocate_image_pages(), so that the total number of
saveable non-highem pages left is not less than the minimum size of
a hibernation image.  Change hibernate_preallocate_memory() to try to
allocate from highmem if the number of pages allocated by
preallocate_image_memory() is too low.

Modify free_unnecessary_pages() to take all possible memory
allocation patterns into account.

Reported-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Tested-by: M. Vefa Bicakci <bicave@superonline.com>
11 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
Linus Torvalds [Sat, 11 Sep 2010 15:06:38 +0000 (08:06 -0700)]
Merge git://git./linux/kernel/git/davem/net-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (28 commits)
  ipheth: remove incorrect devtype to WWAN
  MAINTAINERS: Add CAIF
  sctp: fix test for end of loop
  KS8851: Correct RX packet allocation
  udp: add rehash on connect()
  net: blackhole route should always be recalculated
  ipv4: Suppress lockdep-RCU false positive in FIB trie (3)
  niu: Fix kernel buffer overflow for ETHTOOL_GRXCLSRLALL
  ipvs: fix active FTP
  gro: Re-fix different skb headrooms
  via-velocity: Turn scatter-gather support back off.
  ipv4: Fix reverse path filtering with multipath routing.
  UNIX: Do not loop forever at unix_autobind().
  PATCH: b44 Handle RX FIFO overflow better (simplified)
  irda: off by one
  3c59x: Fix deadlock in vortex_error()
  netfilter: discard overlapping IPv6 fragment
  ipv6: discard overlapping fragment
  net: fix tx queue selection for bridged devices implementing select_queue
  bonding: Fix jiffies overflow problems (again)
  ...

Fix up trivial conflicts due to the same cgroup API thinko fix going
through both Andrew and the networking tree.  However, there were small
differences between the two, with Andrew's version generally being the
nicer one, and the one I merged first. So pick that one.

Conflicts in: include/linux/cgroup.h and kernel/cgroup.c

11 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
Linus Torvalds [Sat, 11 Sep 2010 15:01:09 +0000 (08:01 -0700)]
Merge git://git./linux/kernel/git/davem/sparc-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
  sparc: Kill all BKL usage.

11 years agoMerge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 11 Sep 2010 14:59:49 +0000 (07:59 -0700)]
Merge branch 'sched-fixes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, tsc: Fix a preemption leak in restore_sched_clock_state()
  sched: Move sched_avg_update() to update_cpu_load()

11 years agox86, tsc: Fix a preemption leak in restore_sched_clock_state()
Peter Zijlstra [Fri, 10 Sep 2010 20:32:53 +0000 (22:32 +0200)]
x86, tsc: Fix a preemption leak in restore_sched_clock_state()

Doh, a real life genuine preemption leak..

This caused a suspend failure.

Reported-bisected-and-tested-by-the-invaluable: Jeff Chua <jeff.chua.linux@gmail.com>
Acked-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Nico Schottelius <nico-linux-20100709@schottelius.org>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Florian Pritz <flo@xssn.at>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Len Brown <lenb@kernel.org>
Cc: <stable@kernel.org> # Greg, please apply after: cd7240c ("x86, tsc, sched: Recompute cyc2ns_offset's during resume from")
sleep states
LKML-Reference: <1284150773.402.122.camel@laptop>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
11 years agoMerge branch 'drm-intel-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/ickle...
Linus Torvalds [Sat, 11 Sep 2010 01:19:43 +0000 (18:19 -0700)]
Merge branch 'drm-intel-fixes' of git://git./linux/kernel/git/ickle/drm-intel

* 'drm-intel-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/ickle/drm-intel:
  drm/i915: don't enable self-refresh on Ironlake
  drm/i915: Double check that the wait_request is not pending before warning
  Revert "drm/i915: Warn if we run out of FIFO space for a mode"
  Revert "drm/i915: Allow LVDS on pipe A on gen4+"
  Revert "drm/i915: Enable RC6 on Ironlake."

11 years agoMerge branch 'for-linus' of git://oss.sgi.com/xfs/xfs
Linus Torvalds [Sat, 11 Sep 2010 01:19:26 +0000 (18:19 -0700)]
Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs

* 'for-linus' of git://oss.sgi.com/xfs/xfs:
  xfs: log IO completion workqueue is a high priority queue
  xfs: prevent reading uninitialized stack memory

11 years agox86, tsc: Fix a preemption leak in restore_sched_clock_state()
Peter Zijlstra [Fri, 10 Sep 2010 20:32:53 +0000 (22:32 +0200)]
x86, tsc: Fix a preemption leak in restore_sched_clock_state()

A real life genuine preemption leak..

Reported-and-tested-by: Jeff Chua <jeff.chua.linux@gmail.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agoPM QoS: Correct pr_debug() misuse and improve parameter checks
mark gross [Thu, 9 Sep 2010 21:20:09 +0000 (23:20 +0200)]
PM QoS: Correct pr_debug() misuse and improve parameter checks

Correct some pr_debug() misuse and add a stronger parameter check to
pm_qos_write() for the ASCII hex value case.  Thanks to Dan Carpenter
for pointing out the problem!

Signed-off-by: mark gross <markgross@thegnar.org>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
11 years agoxfs: log IO completion workqueue is a high priority queue
Dave Chinner [Wed, 8 Sep 2010 09:00:22 +0000 (09:00 +0000)]
xfs: log IO completion workqueue is a high priority queue

The workqueue implementation in 2.6.36-rcX has changed, resulting
in the workqueues no longer having dedicated threads for work
processing. This has caused severe livelocks under heavy parallel
create workloads because the log IO completions have been getting
held up behind metadata IO completions.  Hence log commits would
stall, memory allocation would stall because pages could not be
cleaned, and lock contention on the AIL during inode IO completion
processing was being seen to slow everything down even further.

By making the log Io completion workqueue a high priority workqueue,
they are queued ahead of all data/metadata IO completions and
processed before the data/metadata completions. Hence the log never
gets stalled, and operations needed to clean memory can continue as
quickly as possible. This avoids the livelock conditions and allos
the system to keep running under heavy load as per normal.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Alex Elder <aelder@sgi.com>
11 years agoexecve: make responsive to SIGKILL with large arguments
Roland McGrath [Wed, 8 Sep 2010 02:37:06 +0000 (19:37 -0700)]
execve: make responsive to SIGKILL with large arguments

An execve with a very large total of argument/environment strings
can take a really long time in the execve system call.  It runs
uninterruptibly to count and copy all the strings.  This change
makes it abort the exec quickly if sent a SIGKILL.

Note that this is the conservative change, to interrupt only for
SIGKILL, by using fatal_signal_pending().  It would be perfectly
correct semantics to let any signal interrupt the string-copying in
execve, i.e. use signal_pending() instead of fatal_signal_pending().
We'll save that change for later, since it could have user-visible
consequences, such as having a timer set too quickly make it so that
an execve can never complete, though it always happened to work before.

Signed-off-by: Roland McGrath <roland@redhat.com>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agoexecve: improve interactivity with large arguments
Roland McGrath [Wed, 8 Sep 2010 02:36:28 +0000 (19:36 -0700)]
execve: improve interactivity with large arguments

This adds a preemption point during the copying of the argument and
environment strings for execve, in copy_strings().  There is already
a preemption point in the count() loop, so this doesn't add any new
points in the abstract sense.

When the total argument+environment strings are very large, the time
spent copying them can be much more than a normal user time slice.
So this change improves the interactivity of the rest of the system
when one process is doing an execve with very large arguments.

Signed-off-by: Roland McGrath <roland@redhat.com>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agosetup_arg_pages: diagnose excessive argument size
Roland McGrath [Wed, 8 Sep 2010 02:35:49 +0000 (19:35 -0700)]
setup_arg_pages: diagnose excessive argument size

The CONFIG_STACK_GROWSDOWN variant of setup_arg_pages() does not
check the size of the argument/environment area on the stack.
When it is unworkably large, shift_arg_pages() hits its BUG_ON.
This is exploitable with a very large RLIMIT_STACK limit, to
create a crash pretty easily.

Check that the initial stack is not too large to make it possible
to map in any executable.  We're not checking that the actual
executable (or intepreter, for binfmt_elf) will fit.  So those
mappings might clobber part of the initial stack mapping.  But
that is just userland lossage that userland made happen, not a
kernel problem.

Signed-off-by: Roland McGrath <roland@redhat.com>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agoMerge branch 'kvm-updates/2.6.36' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Linus Torvalds [Fri, 10 Sep 2010 15:02:45 +0000 (08:02 -0700)]
Merge branch 'kvm-updates/2.6.36' of git://git./virt/kvm/kvm

* 'kvm-updates/2.6.36' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: x86: Perform hardware_enable in CPU_STARTING callback
  KVM: i8259: fix migration
  KVM: fix i8259 oops when no vcpus are online
  KVM: x86 emulator: fix regression with cmpxchg8b on i386 hosts

11 years agoMerge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 10 Sep 2010 14:31:24 +0000 (07:31 -0700)]
Merge branch 'perf-fixes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  tracing: t_start: reset FTRACE_ITER_HASH in case of seek/pread
  perf symbols: Fix multiple initialization of symbol system
  perf: Fix CPU hotplug
  perf, trace: Fix module leak
  tracing/kprobe: Fix handling of C-unlike argument names
  tracing/kprobes: Fix handling of argument names
  perf probe: Fix handling of arguments names
  perf probe: Fix return probe support
  tracing/kprobe: Fix a memory leak in error case
  tracing: Do not allow llseek to set_ftrace_filter

11 years agoKEYS: Fix bug in keyctl_session_to_parent() if parent has no session keyring
David Howells [Fri, 10 Sep 2010 08:59:51 +0000 (09:59 +0100)]
KEYS: Fix bug in keyctl_session_to_parent() if parent has no session keyring

Fix a bug in keyctl_session_to_parent() whereby it tries to check the ownership
of the parent process's session keyring whether or not the parent has a session
keyring [CVE-2010-2960].

This results in the following oops:

  BUG: unable to handle kernel NULL pointer dereference at 00000000000000a0
  IP: [<ffffffff811ae4dd>] keyctl_session_to_parent+0x251/0x443
  ...
  Call Trace:
   [<ffffffff811ae2f3>] ? keyctl_session_to_parent+0x67/0x443
   [<ffffffff8109d286>] ? __do_fault+0x24b/0x3d0
   [<ffffffff811af98c>] sys_keyctl+0xb4/0xb8
   [<ffffffff81001eab>] system_call_fastpath+0x16/0x1b

if the parent process has no session keyring.

If the system is using pam_keyinit then it mostly protected against this as all
processes derived from a login will have inherited the session keyring created
by pam_keyinit during the log in procedure.

To test this, pam_keyinit calls need to be commented out in /etc/pam.d/.

Reported-by: Tavis Ormandy <taviso@cmpxchg8b.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Tavis Ormandy <taviso@cmpxchg8b.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agoKEYS: Fix RCU no-lock warning in keyctl_session_to_parent()
David Howells [Fri, 10 Sep 2010 08:59:46 +0000 (09:59 +0100)]
KEYS: Fix RCU no-lock warning in keyctl_session_to_parent()

There's an protected access to the parent process's credentials in the middle
of keyctl_session_to_parent().  This results in the following RCU warning:

  ===================================================
  [ INFO: suspicious rcu_dereference_check() usage. ]
  ---------------------------------------------------
  security/keys/keyctl.c:1291 invoked rcu_dereference_check() without protection!

  other info that might help us debug this:

  rcu_scheduler_active = 1, debug_locks = 0
  1 lock held by keyctl-session-/2137:
   #0:  (tasklist_lock){.+.+..}, at: [<ffffffff811ae2ec>] keyctl_session_to_parent+0x60/0x236

  stack backtrace:
  Pid: 2137, comm: keyctl-session- Not tainted 2.6.36-rc2-cachefs+ #1
  Call Trace:
   [<ffffffff8105606a>] lockdep_rcu_dereference+0xaa/0xb3
   [<ffffffff811ae379>] keyctl_session_to_parent+0xed/0x236
   [<ffffffff811af77e>] sys_keyctl+0xb4/0xb6
   [<ffffffff81001eab>] system_call_fastpath+0x16/0x1b

The code should take the RCU read lock to make sure the parents credentials
don't go away, even though it's holding a spinlock and has IRQ disabled.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agoMerge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block
Linus Torvalds [Fri, 10 Sep 2010 14:26:27 +0000 (07:26 -0700)]
Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block

* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
  block: Range check cpu in blk_cpu_to_group
  scatterlist: prevent invalid free when alloc fails
  writeback: Fix lost wake-up shutting down writeback thread
  writeback: do not lose wakeup events when forking bdi threads
  cciss: fix reporting of max queue depth since init
  block: switch s390 tape_block and mg_disk to elevator_change()
  block: add function call to switch the IO scheduler from a driver
  fs/bio-integrity.c: return -ENOMEM on kmalloc failure
  bio-integrity.c: remove dependency on __GFP_NOFAIL
  BLOCK: fix bio.bi_rw handling
  block: put dev->kobj in blk_register_queue fail path
  cciss: handle allocation failure
  cfq-iosched: Documentation help for new tunables
  cfq-iosched: blktrace print per slice sector stats
  cfq-iosched: Implement tunable group_idle
  cfq-iosched: Do group share accounting in IOPS when slice_idle=0
  cfq-iosched: Do not idle if slice_idle=0
  cciss: disable doorbell reset on reset_devices
  blkio: Fix return code for mkdir calls

11 years agoMerge branch 'at91-fixes-for-linus' of git://github.com/at91linux/linux-2.6-at91
Linus Torvalds [Fri, 10 Sep 2010 14:24:51 +0000 (07:24 -0700)]
Merge branch 'at91-fixes-for-linus' of git://github.com/at91linux/linux-2.6-at91

* 'at91-fixes-for-linus' of git://github.com/at91linux/linux-2.6-at91:
  AT91: at91sam9261ek: remove C99 comments but keep information
  AT91: at91sam9261ek board: remove warnings related to use of SPI or SD/MMC
  AT91: dm9000 initialization update
  AT91: SAM9G45 - add a separate clock entry for every single TC block
  AT91: clock: peripheral clocks can have other parent than mck
  AT91: change dma resource index

11 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6
Linus Torvalds [Fri, 10 Sep 2010 14:23:45 +0000 (07:23 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/tiwai/sound-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6:
  ALSA: rawmidi: fix the get next midi device ioctl
  ALSA: hda - Fix wrong HP pin detection in snd_hda_parse_pin_def_config()
  ALSA: seq/oss - Fix double-free at error path of snd_seq_oss_open()
  ALSA: msnd-classic: Fix invalid cfg parameter
  ALSA: hda - Enable PC-beep for EeePC with ALC269 codec
  ALSA: hda - Add errata initverb sequence for CS42xx codecs
  ALSA: usb - Release capture substream URBs properly
  ALSA: virtuoso: fix setting of Xonar DS line-in/mic-in controls
  ALSA: virtuoso: work around missing reset in the Xonar DS Windows driver
  ALSA: hda - Add quirk for Lenovo T400s
  ALSA: usb-audio: fix detection of vendor-specific device protocol settings
  ALSA: usb-audio: Assume first control interface is for audio
  ALSA: hda - Add a new hp-laptop model for Conexant 5066, tested on HP G60

11 years agodrm/i915: don't enable self-refresh on Ironlake
Jesse Barnes [Thu, 9 Sep 2010 18:58:02 +0000 (11:58 -0700)]
drm/i915: don't enable self-refresh on Ironlake

We don't know how to enable it safely, especially as outputs turn on and
off.  When disabling LP1 we also need to make sure LP2 and 3 are already
disabled.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=29173
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=29082
Reported-by: Chris Lord <chris@linux.intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Tested-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: stable@kernel.org
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
11 years agoxfs: prevent reading uninitialized stack memory
Dan Rosenberg [Mon, 6 Sep 2010 22:24:57 +0000 (18:24 -0400)]
xfs: prevent reading uninitialized stack memory

The XFS_IOC_FSGETXATTR ioctl allows unprivileged users to read 12
bytes of uninitialized stack memory, because the fsxattr struct
declared on the stack in xfs_ioc_fsgetxattr() does not alter (or zero)
the 12-byte fsx_pad member before copying it back to the user.  This
patch takes care of it.

Signed-off-by: Dan Rosenberg <dan.j.rosenberg@gmail.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Alex Elder <aelder@sgi.com>
11 years agoAT91: at91sam9261ek: remove C99 comments but keep information
Nicolas Ferre [Fri, 10 Sep 2010 12:36:06 +0000 (14:36 +0200)]
AT91: at91sam9261ek: remove C99 comments but keep information

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
11 years agoAT91: at91sam9261ek board: remove warnings related to use of SPI or SD/MMC
Nicolas Ferre [Fri, 10 Sep 2010 09:26:42 +0000 (11:26 +0200)]
AT91: at91sam9261ek board: remove warnings related to use of SPI or SD/MMC

The sd/mmc data structure is not used if SPI is selected. The configuration
of PIO on the board prevent from using both interfaces at the same time
(board dependent).
Remove the warnings at compilation time adding a preprocessor condition.

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
11 years agoAT91: dm9000 initialization update
Nicolas Ferre [Fri, 10 Sep 2010 09:38:43 +0000 (11:38 +0200)]
AT91: dm9000 initialization update

Add information in dm9000 mac/phy chip initialization:
- irq resource details
- platform data details

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
11 years agoALSA: snd-usb-caiaq: Add support for Traktor Kontrol S4
Daniel Mack [Fri, 10 Sep 2010 09:04:57 +0000 (17:04 +0800)]
ALSA: snd-usb-caiaq: Add support for Traktor Kontrol S4

This patch adds support for the new Traktor Kontrol S4 by Native
Instruments. It features a new audio data streaming model, MIDI
in and out ports, a huge number of 174 dimmable LEDs, 96 buttons
and 46 absolute encoder axis, including some rotary encoders.

All features are supported by the driver now.

Did some code refactoring along the way.

Signed-off-by: Daniel Mack <daniel@caiaq.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
11 years agoALSA: snd-usb-caiaq: drop version number
Daniel Mack [Fri, 10 Sep 2010 08:12:34 +0000 (16:12 +0800)]
ALSA: snd-usb-caiaq: drop version number

Let git do the job.

Signed-off-by: Daniel Mack <daniel@caiaq.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
11 years agoblock: Range check cpu in blk_cpu_to_group
Brian King [Fri, 10 Sep 2010 07:03:21 +0000 (09:03 +0200)]
block: Range check cpu in blk_cpu_to_group

While testing CPU DLPAR, the following problem was discovered.
We were DLPAR removing the first CPU, which in this case was
logical CPUs 0-3. CPUs 0-2 were already marked offline and
we were in the process of offlining CPU 3. After marking
the CPU inactive and offline in cpu_disable, but before the
cpu was completely idle (cpu_die), we ended up in __make_request
on CPU 3. There we looked at the topology map to see which CPU
to complete the I/O on and found no CPUs in the cpu_sibling_map.
This resulted in the block layer setting the completion cpu
to be NR_CPUS, which then caused an oops when we tried to
complete the I/O.

Fix this by sanity checking the value we return from blk_cpu_to_group
to be a valid cpu value.

Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
11 years agoMerge branch 'fix/hda' into for-linus
Takashi Iwai [Fri, 10 Sep 2010 06:27:00 +0000 (08:27 +0200)]
Merge branch 'fix/hda' into for-linus

11 years agoMerge branch 'tip/perf/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/roste...
Ingo Molnar [Fri, 10 Sep 2010 06:05:34 +0000 (08:05 +0200)]
Merge branch 'tip/perf/urgent' of git://git./linux/kernel/git/rostedt/linux-2.6-trace into perf/urgent

11 years agoMerge branch 'perf/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/acme...
Ingo Molnar [Fri, 10 Sep 2010 05:34:14 +0000 (07:34 +0200)]
Merge branch 'perf/urgent' of git://git./linux/kernel/git/acme/linux-2.6 into perf/urgent

11 years agoMerge branch 'vhost-net' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
David S. Miller [Fri, 10 Sep 2010 04:59:51 +0000 (21:59 -0700)]
Merge branch 'vhost-net' of git://git./linux/kernel/git/mst/vhost

11 years agoipheth: remove incorrect devtype to WWAN
Dan Williams [Wed, 8 Sep 2010 07:50:47 +0000 (07:50 +0000)]
ipheth: remove incorrect devtype to WWAN

The 'wwan' devtype is meant for devices that require preconfiguration
and *every* time setup before the ethernet interface can be used, like
cellular modems which require a series of setup commands on serial ports
or other mechanisms before the ethernet interface will handle packets.

As ipheth only requires one-per-hotplug pairing setup with no
preconfiguration (like APN, phone #, etc) and the network interface is
usable at any time after that initial setup, remove the incorrect
devtype wwan.

Signed-off-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
11 years agoMAINTAINERS: Add CAIF
Joe Perches [Tue, 7 Sep 2010 20:33:24 +0000 (20:33 +0000)]
MAINTAINERS: Add CAIF

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
11 years agoMerge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzi...
Linus Torvalds [Fri, 10 Sep 2010 03:28:19 +0000 (20:28 -0700)]
Merge branch 'upstream-linus' of git://git./linux/kernel/git/jgarzik/libata-dev

* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev:
  libata-sff: Reenable Port Multiplier after libata-sff remodeling.
  libata: skip EH autopsy and recovery during suspend
  ahci: AHCI and RAID mode SATA patch for Intel Patsburg DeviceIDs
  ata_piix: IDE Mode SATA patch for Intel Patsburg DeviceIDs
  libata,pata_via: revert ata_wait_idle() removal from ata_sff/via_tf_load()
  ahci: fix hang on failed softreset
  pata_artop: Fix device ID parity check

11 years agotracing: t_start: reset FTRACE_ITER_HASH in case of seek/pread
Chris Wright [Thu, 9 Sep 2010 23:34:59 +0000 (16:34 -0700)]
tracing: t_start: reset FTRACE_ITER_HASH in case of seek/pread

Be sure to avoid entering t_show() with FTRACE_ITER_HASH set without
having properly started the iterator to iterate the hash.  This case is
degenerate and, as discovered by Robert Swiecki, can cause t_hash_show()
to misuse a pointer.  This causes a NULL ptr deref with possible security
implications.  Tracked as CVE-2010-3079.

Cc: Robert Swiecki <swiecki@google.com>
Cc: Eugene Teo <eugene@redhat.com>
Cc: <stable@kernel.org>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
11 years agolibata-sff: Reenable Port Multiplier after libata-sff remodeling.
Gwendal Grignou [Tue, 31 Aug 2010 23:20:36 +0000 (16:20 -0700)]
libata-sff: Reenable Port Multiplier after libata-sff remodeling.

Keep track of the link on the which the current request is in progress.
It allows support of links behind port multiplier.

Not all libata-sff is PMP compliant. Code for native BMDMA controller
does not take in accound PMP.

Tested on Marvell 7042 and Sil7526.

Signed-off-by: Gwendal Grignou <gwendal@google.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
11 years agolibata: skip EH autopsy and recovery during suspend
Tejun Heo [Tue, 7 Sep 2010 12:05:31 +0000 (14:05 +0200)]
libata: skip EH autopsy and recovery during suspend

For some mysterious reason, certain hardware reacts badly to usual EH
actions while the system is going for suspend.  As the devices won't
be needed until the system is resumed, ask EH to skip usual autopsy
and recovery and proceed directly to suspend.

Signed-off-by: Tejun Heo <tj@kernel.org>
Tested-by: Stephan Diestelhorst <stephan.diestelhorst@amd.com>
Cc: stable@kernel.org
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
11 years agoahci: AHCI and RAID mode SATA patch for Intel Patsburg DeviceIDs
Seth Heasley [Thu, 9 Sep 2010 16:44:56 +0000 (09:44 -0700)]
ahci: AHCI and RAID mode SATA patch for Intel Patsburg DeviceIDs

This patch adds the Intel Patsburg (PCH) SATA AHCI and RAID Controller
DeviceIDs.

Signed-off-by: Seth Heasley <seth.heasley@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
11 years agoata_piix: IDE Mode SATA patch for Intel Patsburg DeviceIDs
Seth Heasley [Thu, 9 Sep 2010 16:42:40 +0000 (09:42 -0700)]
ata_piix: IDE Mode SATA patch for Intel Patsburg DeviceIDs

This patch adds the Intel Patsburg (PCH) IDE mode SATA Controller DeviceIDs.

Signed-off-by: Seth Heasley <seth.heasley@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
11 years agolibata,pata_via: revert ata_wait_idle() removal from ata_sff/via_tf_load()
Tejun Heo [Thu, 9 Sep 2010 15:13:31 +0000 (17:13 +0200)]
libata,pata_via: revert ata_wait_idle() removal from ata_sff/via_tf_load()

Commit 978c0666 (libata: Remove excess delay in the tf_load path)
removed ata_wait_idle() from ata_sff_tf_load() and via_tf_load().
This caused obscure detection problems in sata_sil.

  https://bugzilla.kernel.org/show_bug.cgi?id=16606

The commit was pure performance optimization.  Revert it for now.

Reported-by: Dieter Plaetinck <dieter@plaetinck.be>
Reported-by: Jan Beulich <JBeulich@novell.com>
Bisected-by: gianluca <gianluca@sottospazio.it>
Cc: stable@kernel.org
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
11 years agominix: fix regression in minix_mkdir()
Jorge Boncompte [DTI2] [Thu, 9 Sep 2010 23:38:19 +0000 (16:38 -0700)]
minix: fix regression in minix_mkdir()

Commit 9eed1fb721c ("minix: replace inode uid,gid,mode init with helper")
broke directory creation on minix filesystems.

Fix it by passing the needed mode flag to inode init helper.

Signed-off-by: Jorge Boncompte [DTI2] <jorge@dti2.net>
Cc: Dmitry Monakhov <dmonakhov@openvz.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: <stable@kernel.org> [2.6.35.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agomm: page allocator: drain per-cpu lists after direct reclaim allocation fails
Mel Gorman [Thu, 9 Sep 2010 23:38:18 +0000 (16:38 -0700)]
mm: page allocator: drain per-cpu lists after direct reclaim allocation fails

When under significant memory pressure, a process enters direct reclaim
and immediately afterwards tries to allocate a page.  If it fails and no
further progress is made, it's possible the system will go OOM.  However,
on systems with large amounts of memory, it's possible that a significant
number of pages are on per-cpu lists and inaccessible to the calling
process.  This leads to a process entering direct reclaim more often than
it should increasing the pressure on the system and compounding the
problem.

This patch notes that if direct reclaim is making progress but allocations
are still failing that the system is already under heavy pressure.  In
this case, it drains the per-cpu lists and tries the allocation a second
time before continuing.

Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Reviewed-by: Minchan Kim <minchan.kim@gmail.com>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Reviewed-by: Christoph Lameter <cl@linux.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agomm: page allocator: calculate a better estimate of NR_FREE_PAGES when memory is low...
Christoph Lameter [Thu, 9 Sep 2010 23:38:17 +0000 (16:38 -0700)]
mm: page allocator: calculate a better estimate of NR_FREE_PAGES when memory is low and kswapd is awake

Ordinarily watermark checks are based on the vmstat NR_FREE_PAGES as it is
cheaper than scanning a number of lists.  To avoid synchronization
overhead, counter deltas are maintained on a per-cpu basis and drained
both periodically and when the delta is above a threshold.  On large CPU
systems, the difference between the estimated and real value of
NR_FREE_PAGES can be very high.  If NR_FREE_PAGES is much higher than
number of real free page in buddy, the VM can allocate pages below min
watermark, at worst reducing the real number of pages to zero.  Even if
the OOM killer kills some victim for freeing memory, it may not free
memory if the exit path requires a new page resulting in livelock.

This patch introduces a zone_page_state_snapshot() function (courtesy of
Christoph) that takes a slightly more accurate view of an arbitrary vmstat
counter.  It is used to read NR_FREE_PAGES while kswapd is awake to avoid
the watermark being accidentally broken.  The estimate is not perfect and
may result in cache line bounces but is expected to be lighter than the
IPI calls necessary to continually drain the per-cpu counters while kswapd
is awake.

Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agomm: page allocator: update free page counters after pages are placed on the free...
Mel Gorman [Thu, 9 Sep 2010 23:38:16 +0000 (16:38 -0700)]
mm: page allocator: update free page counters after pages are placed on the free list

When allocating a page, the system uses NR_FREE_PAGES counters to
determine if watermarks would remain intact after the allocation was made.
This check is made without interrupts disabled or the zone lock held and
so is race-prone by nature.  Unfortunately, when pages are being freed in
batch, the counters are updated before the pages are added on the list.
During this window, the counters are misleading as the pages do not exist
yet.  When under significant pressure on systems with large numbers of
CPUs, it's possible for processes to make progress even though they should
have been stalled.  This is particularly problematic if a number of the
processes are using GFP_ATOMIC as the min watermark can be accidentally
breached and in extreme cases, the system can livelock.

This patch updates the counters after the pages have been added to the
list.  This makes the allocator more cautious with respect to preserving
the watermarks and mitigates livelock possibilities.

[akpm@linux-foundation.org: avoid modifying incoming args]
Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Reviewed-by: Rik van Riel <riel@redhat.com>
Reviewed-by: Minchan Kim <minchan.kim@gmail.com>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Reviewed-by: Christoph Lameter <cl@linux.com>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agovmstat: update zone stat threshold when onlining a cpu
KAMEZAWA Hiroyuki [Thu, 9 Sep 2010 23:38:14 +0000 (16:38 -0700)]
vmstat: update zone stat threshold when onlining a cpu

refresh_zone_stat_thresholds() calculates parameter based on the number of
online cpus.  It's called at cpu offlining but needs to be called at
onlining, too.

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Christoph Lameter <cl@linux-foundation.org>
Acked-by: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agovfs: take O_NONBLOCK out of the O_* uniqueness test
James Bottomley [Thu, 9 Sep 2010 23:38:12 +0000 (16:38 -0700)]
vfs: take O_NONBLOCK out of the O_* uniqueness test

O_NONBLOCK on parisc has a dual value:

#define O_NONBLOCK 000200004 /* HPUX has separate NDELAY & NONBLOCK */

It is caught by the O_* bits uniqueness check and leads to a parisc
compile error.  The fix would be to take O_NONBLOCK out.

Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Cc: Jamie Lokier <jamie@shareable.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agoswap: discard while swapping only if SWAP_FLAG_DISCARD
Hugh Dickins [Thu, 9 Sep 2010 23:38:11 +0000 (16:38 -0700)]
swap: discard while swapping only if SWAP_FLAG_DISCARD

Tests with recent firmware on Intel X25-M 80GB and OCZ Vertex 60GB SSDs
show a shift since I last tested in December: in part because of firmware
updates, in part because of the necessary move from barriers to awaiting
completion at the block layer.  While discard at swapon still shows as
slightly beneficial on both, discarding 1MB swap cluster when allocating
is now disadvanteous: adds 25% overhead on Intel, adds 230% on OCZ (YMMV).

Surrender: discard as presently implemented is more hindrance than help
for swap; but might prove useful on other devices, or with improvements.
So continue to do the discard at swapon, but make discard while swapping
conditional on a SWAP_FLAG_DISCARD to sys_swapon() (which has been using
only the lower 16 bits of int flags).

We can add a --discard or -d to swapon(8), and a "discard" to swap in
/etc/fstab: matching the mount option for btrfs, ext4, fat, gfs2, nilfs2.

Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Nigel Cunningham <nigel@tuxonice.net>
Cc: Tejun Heo <tj@kernel.org>
Cc: Jens Axboe <jaxboe@fusionio.com>
Cc: James Bottomley <James.Bottomley@hansenpartnership.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agoswap: do not send discards as barriers
Christoph Hellwig [Thu, 9 Sep 2010 23:38:10 +0000 (16:38 -0700)]
swap: do not send discards as barriers

The swap code already uses synchronous discards, no need to add I/O
barriers.

This fixes the worst of the terrible slowdown in swap allocation for
hibernation, reported on 2.6.35 by Nigel Cunningham; but does not entirely
eliminate that regression.

[tj@kernel.org: superflous newlines removed]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Nigel Cunningham <nigel@tuxonice.net>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: Jens Axboe <jaxboe@fusionio.com>
Cc: James Bottomley <James.Bottomley@hansenpartnership.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agoswap: prevent reuse during hibernation
Hugh Dickins [Thu, 9 Sep 2010 23:38:09 +0000 (16:38 -0700)]
swap: prevent reuse during hibernation

Move the hibernation check from scan_swap_map() into try_to_free_swap():
to catch not only the common case when hibernation's allocation itself
triggers swap reuse, but also the less likely case when concurrent page
reclaim (shrink_page_list) might happen to try_to_free_swap from a page.

Hibernation already clears __GFP_IO from the gfp_allowed_mask, to stop
reclaim from going to swap: check that to prevent swap reuse too.

Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Ondrej Zary <linux@rainbow-software.org>
Cc: Andrea Gelmini <andrea.gelmini@gmail.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Nigel Cunningham <nigel@tuxonice.net>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agoswap: revert special hibernation allocation
Hugh Dickins [Thu, 9 Sep 2010 23:38:07 +0000 (16:38 -0700)]
swap: revert special hibernation allocation

Please revert 2.6.36-rc commit d2997b1042ec150616c1963b5e5e919ffd0b0ebf
"hibernation: freeze swap at hibernation".  It complicated matters by
adding a second swap allocation path, just for hibernation; without in any
way fixing the issue that it was intended to address - page reclaim after
fixing the hibernation image might free swap from a page already imaged as
swapcache, letting its swap be reallocated to store a different page of
the image: resulting in data corruption if the imaged page were freed as
clean then swapped back in.  Pages freed to si->swap_map were still in
danger of being reallocated by the alternative allocation path.

I guess it inadvertently fixed slow SSD swap allocation for hibernation,
as reported by Nigel Cunningham: by missing out the discards that occur on
the usual swap allocation path; but that was unintentional, and needs a
separate fix.

Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Ondrej Zary <linux@rainbow-software.org>
Cc: Andrea Gelmini <andrea.gelmini@gmail.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Nigel Cunningham <nigel@tuxonice.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agobounce: call flush_dcache_page() after bounce_copy_vec()
Gary King [Thu, 9 Sep 2010 23:38:05 +0000 (16:38 -0700)]
bounce: call flush_dcache_page() after bounce_copy_vec()

I have been seeing problems on Tegra 2 (ARMv7 SMP) systems with HIGHMEM
enabled on 2.6.35 (plus some patches targetted at 2.6.36 to perform cache
maintenance lazily), and the root cause appears to be that the mm bouncing
code is calling flush_dcache_page before it copies the bounce buffer into
the bio.

The bounced page needs to be flushed after data is copied into it, to
ensure that architecture implementations can synchronize instruction and
data caches if necessary.

Signed-off-by: Gary King <gking@nvidia.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Russell King <rmk@arm.linux.org.uk>
Acked-by: Jens Axboe <axboe@kernel.dk>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agodrivers/rtc/rtc-pl031.c: do not mark PL031 IRQ as shared
Linus Walleij [Thu, 9 Sep 2010 23:38:04 +0000 (16:38 -0700)]
drivers/rtc/rtc-pl031.c: do not mark PL031 IRQ as shared

It was a mistake to mark the PL031 IRQ as shared (for the U8500),
we misread the datasheet. Get rid of this.

Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Cc: Jonas Aberg <jonas.aberg@stericsson.com>
Cc: Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agoMAINTAINERS: correct entry for legacy RTC-driver
Wolfram Sang [Thu, 9 Sep 2010 23:38:04 +0000 (16:38 -0700)]
MAINTAINERS: correct entry for legacy RTC-driver

Because no one dared to remove it so far, let's keep the entry correct, at
least.

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Cc: Paul Gortmaker <p_gortmaker@yahoo.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agogpio: doc updates
David Brownell [Thu, 9 Sep 2010 23:38:03 +0000 (16:38 -0700)]
gpio: doc updates

There's been some recent confusion about error checking GPIO numbers.
briefly, it should be handled mostly during setup, when gpio_request() is
called, and NEVER by expectig gpio_is_valid to report more than
never-usable GPIO numbers.

[akpm@linux-foundation.org: terminate unterminated comment]
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: Eric Miao" <eric.y.miao@gmail.com>
Cc: "Ryan Mallon" <ryan@bluewatersys.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agogpio: sx150x: correct and refine reset-on-probe behavior
Gregory Bean [Thu, 9 Sep 2010 23:38:02 +0000 (16:38 -0700)]
gpio: sx150x: correct and refine reset-on-probe behavior

Replace the arbitrary software-reset call from the device-probe
method, because:

- It is defective.  To work correctly, it should be two byte writes,
  not a single word write.  As it stands, it does nothing.

- Some devices with sx150x expanders installed have their NRESET pins
  ganged on the same line, so resetting one causes the others to reset -
  not a nice thing to do arbitrarily!

- The probe, usually taking place at boot, implies a recent hard-reset,
  so a software reset at this point is just a waste of energy anyway.

Therefore, make it optional, defaulting to off, as this will match the
common case of probing at powerup and also matches the current broken
no-op behavior.

Signed-off-by: Gregory Bean <gbean@codeaurora.org>
Reviewed-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agomemory hotplug: fix next block calculation in is_removable
KAMEZAWA Hiroyuki [Thu, 9 Sep 2010 23:38:01 +0000 (16:38 -0700)]
memory hotplug: fix next block calculation in is_removable

next_active_pageblock() is for finding next _used_ freeblock.  It skips
several blocks when it finds there are a chunk of free pages lager than
pageblock.  But it has 2 bugs.

  1. We have no lock. page_order(page) - pageblock_order can be minus.
  2. pageblocks_stride += is wrong. it should skip page_order(p) of pages.

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agomm: compaction: handle active and inactive fairly in too_many_isolated
Minchan Kim [Thu, 9 Sep 2010 23:38:00 +0000 (16:38 -0700)]
mm: compaction: handle active and inactive fairly in too_many_isolated

Iram reported that compaction's too_many_isolated() loops forever.
(http://www.spinics.net/lists/linux-mm/msg08123.html)

The meminfo when the situation happened was inactive anon is zero.  That's
because the system has no memory pressure until then.  While all anon
pages were in the active lru, compaction could select active lru as well
as inactive lru.  That's a different thing from vmscan's isolated.  So we
has been two too_many_isolated.

While compaction can isolate pages in both active and inactive, current
implementation of too_many_isolated only considers inactive.  It made
Iram's problem.

This patch handles active and inactive fairly.  That's because we can't
expect where from and how many compaction would isolated pages.

This patch changes (nr_isolated > nr_inactive) with
nr_isolated > (nr_active + nr_inactive) / 2.

Signed-off-by: Minchan Kim <minchan.kim@gmail.com>
Reported-by: Iram Shahzad <iram.shahzad@jp.fujitsu.com>
Acked-by: Mel Gorman <mel@csn.ul.ie>
Acked-by: Wu Fengguang <fengguang.wu@intel.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agokernel/groups.c: fix integer overflow in groups_search
Jerome Marchand [Thu, 9 Sep 2010 23:37:59 +0000 (16:37 -0700)]
kernel/groups.c: fix integer overflow in groups_search

gid_t is a unsigned int.  If group_info contains a gid greater than
MAX_INT, groups_search() function may look on the wrong side of the search
tree.

This solves some unfair "permission denied" problems.

Signed-off-by: Jerome Marchand <jmarchan@redhat.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agoarch/powerpc/include/asm/fsldma.h needs slab.h
Ira W. Snyder [Thu, 9 Sep 2010 23:37:58 +0000 (16:37 -0700)]
arch/powerpc/include/asm/fsldma.h needs slab.h

The slab.h header is required to use the kmalloc() family of functions.
Due to recent kernel changes, this header must be directly included by
code that calls into the memory allocator.

Without this patch, any code which includes this header fails to build.

Signed-off-by: Ira W. Snyder <iws@ovro.caltech.edu>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agortc: m41t80: do not use rtc_valid_tm in m41t80_rtc_read_alarm
Atsushi Nemoto [Thu, 9 Sep 2010 23:37:56 +0000 (16:37 -0700)]
rtc: m41t80: do not use rtc_valid_tm in m41t80_rtc_read_alarm

Commit b485fe5ea ("rtc/m41t80: use rtc_valid_tm() to check returned tm")
added rtc_valid_tm to m41t80_rtc_read_alarm() but it was wrong while the
t->time does not contain complete date/time.

This patch also fixes a warning:
warning: passing argument 1 of 'rtc_valid_tm' from incompatible pointer type

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: Wan ZongShun <mcuos.com@gmail.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agobinfmt_misc: fix binfmt_misc priority
Jan Sembera [Thu, 9 Sep 2010 23:37:54 +0000 (16:37 -0700)]
binfmt_misc: fix binfmt_misc priority

Commit 74641f584da ("alpha: binfmt_aout fix") (May 2009) introduced a
regression - binfmt_misc is now consulted after binfmt_elf, which will
unfortunately break ia32el.  ia32 ELF binaries on ia64 used to be matched
using binfmt_misc and executed using wrapper.  As 32bit binaries are now
matched by binfmt_elf before bindmt_misc kicks in, the wrapper is ignored.

The fix increases precedence of binfmt_misc to the original state.

Signed-off-by: Jan Sembera <jsembera@suse.cz>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Cc: Richard Henderson <rth@twiddle.net
Cc: <stable@kernel.org> [2.6.everything.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agomm: avoid warning when COMPACTION is selected
Andrea Arcangeli [Thu, 9 Sep 2010 23:37:53 +0000 (16:37 -0700)]
mm: avoid warning when COMPACTION is selected

COMPACTION enables MIGRATION, but MIGRATION spawns a warning if numa or
memhotplug aren't selected.  However MIGRATION doesn't depend on them.  I
guess it's just trying to be strict doing a double check on who's enabling
it, but it doesn't know that compaction also enables MIGRATION.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Acked-by: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agomm: fix swapin race condition
Andrea Arcangeli [Thu, 9 Sep 2010 23:37:52 +0000 (16:37 -0700)]
mm: fix swapin race condition

The pte_same check is reliable only if the swap entry remains pinned (by
the page lock on swapcache).  We've also to ensure the swapcache isn't
removed before we take the lock as try_to_free_swap won't care about the
page pin.

One of the possible impacts of this patch is that a KSM-shared page can
point to the anon_vma of another process, which could exit before the page
is freed.

This can leave a page with a pointer to a recycled anon_vma object, or
worse, a pointer to something that is no longer an anon_vma.

[riel@redhat.com: changelog help]
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Acked-by: Hugh Dickins <hughd@google.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agodrivers/mmc/host/imxmmc.c: adjust confusing if indentation
Julia Lawall [Thu, 9 Sep 2010 23:37:50 +0000 (16:37 -0700)]
drivers/mmc/host/imxmmc.c: adjust confusing if indentation

Move the second if (reg & ...) test into the branch indicated by its
indentation.  The test was previously always executed after the if
containing that branch, but it was always false unless the if branch was
taken.

The semantic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@r disable braces4@
position p1,p2;
statement S1,S2;
@@

(
if (...) { ... }
|
if (...) S1@p1 S2@p2
)

@script:python@
p1 << r.p1;
p2 << r.p2;
@@

if (p1[0].column == p2[0].column):
  cocci.print_main("branch",p1)
  cocci.print_secs("after",p2)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Chris Ball <cjb@laptop.org>
Cc: Pavel Pisa <ppisa@pikron.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agoomap hsmmc: fix a racing case between kmmcd and omap_hsmmc_suspend
Ethan Du [Thu, 9 Sep 2010 23:37:49 +0000 (16:37 -0700)]
omap hsmmc: fix a racing case between kmmcd and omap_hsmmc_suspend

If suspend called when kmmcd is doing host->ops->disable, as kmmcd already
increased host->en_dis_recurs to 1, the mmc_host_enable in suspend
function will return directly without increase the nesting_cnt, which will
cause the followed register access carried out to the disabled host.

mmc_suspend_host will enable host itself.  No need to enable host before
it.  Also works on kmmcd will get flushed in mmc_suspend_host, enable host
after it will be safe.  So make the mmc_host_enable after it.

[cjb: rebase against current Linus]
Signed-off-by: Ethan <ethan.too@gmail.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Acked-by: Adrian Hunter <adrian.hunter@nokia.com>
Acked-by: Madhusudhan Chikkature <madhu.cr@ti.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agommc: at91_mci: add missing linux/highmem.h include
Marc Kleine-Budde [Thu, 9 Sep 2010 23:37:48 +0000 (16:37 -0700)]
mmc: at91_mci: add missing linux/highmem.h include

Fix the following error:

at91_mci.c: In function 'at91_mci_sg_to_dma':
at91_mci.c:236: error: implicit declaration of function 'kmap_atomic'
at91_mci.c:236: error: 'KM_BIO_SRC_IRQ' undeclared (first use in this function)
at91_mci.c:236: error: (Each undeclared identifier is reported only once
at91_mci.c:236: error: for each function it appears in.)
at91_mci.c:236: warning: assignment makes pointer from integer without a cast
at91_mci.c:252: error: implicit declaration of function 'kunmap_atomic'
at91_mci.c: In function 'at91_mci_post_dma_read':
at91_mci.c:302: error: 'KM_BIO_SRC_IRQ' undeclared (first use in this function)
at91_mci.c:302: warning: assignment makes pointer from integer without a cast
at91_mci.c:317: error: implicit declaration of function 'flush_kernel_dcache_page'

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Andrew Victor <avictor.za@gmail.com>
Cc: Wolfgang Muees <wolfgang.mues@auerswald.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>