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The lkb bastmode value is set in the context of processing the
lock, and read by the dlm_astd thread. Because it's accessed
in these two separate contexts, the writing/reading ought to
be done under a lock. This is simple to do by setting it and
reading it when the lkb is added to and removed from dlm_astd's
callback list which is properly locked.
Signed-off-by: David Teigland <teigland@redhat.com>
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Just before delivering a blocking callback (bast), the dlm_astd
thread checks again that the granted mode of the lkb actually
blocks the mode requested by the bast. The idea behind this was
originally that the granted mode may have changed since the bast
was queued, making the callback now unnecessary. Reasons for
removing this extra check are:
- dlm_astd doesn't lock the rsb before reading the lkb grmode, so
it's not technically safe (this removes the long standing FIXME)
- after running some tests, it doesn't appear the check ever actually
eliminates a bast
- delivering an unnecessary blocking callback isn't a bad thing and
can happen anyway
Signed-off-by: David Teigland <teigland@redhat.com>
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This is a one-liner to use cond_resched() rather than schedule()
in the ast delivery loop. It should not be necessary to schedule
every time, so this will save some cpu time while continuing to
allow scheduling when required.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>
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The pages used in lowcomms are not highmem, so kmap is not necessary.
Cc: Christine Caulfield <ccaulfie@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>
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fs/dlm/dir.c:419:14: warning: incorrect type in assignment (different base types)
fs/dlm/dir.c:419:14: expected unsigned short [unsigned] [addressable] [assigned] [usertype] be_namelen
fs/dlm/dir.c:419:14: got restricted __be16 [usertype] <noident>
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: David Teigland <teigland@redhat.com>
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Use ls_allocation for memory allocations, which a cluster fs sets to
GFP_NOFS. Use GFP_NOFS for allocations when no lockspace struct is
available. Taking dlm locks needs to avoid calling back into the
cluster fs because write-out can require taking dlm locks.
Cc: Christine Caulfield <ccaulfie@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6:
PCI: ignore bit0 of _OSC return code
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git://git.kernel.org/pub/scm/linux/kernel/git/teigland/dlm
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/dlm:
dlm: fix shutdown cleanup
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git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6:
slab: document SLAB_DESTROY_BY_RCU
Kconfig: SLUB is the default slab allocator
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* master.kernel.org:/home/rmk/linux-2.6-arm:
[ARM] cdb89712: avoid namespace clashes with SRAM_ and BOOTROM_ constants
[ARM] cdb89712,clps7500,h720x: avoid namespace clash for FLASH_* constants
[ARM] integrator,realview,versatile: remove FLASH_* and EPROM_* constants
[ARM] dma-mapping: fix compiler warning
[ARM] iop: iop3xx needs registers mapped uncached+unbuffered
[ARM] versatile: correct MMC clock rate
[ARM] realview: correct MMC clock rate
[ARM] 5329/1: Feroceon: fix feroceon_l2_inv_range
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Commit 2d3854a37e8b767a51aba38ed6d22817b0631e33 ("cpumask: introduce new
API, without changing anything") introduced a build breakage on parisc.
This trivial patch fixes it.
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Kyle Mc Martin <kyle@hera.kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Fixes a regression from commit 0f8e0d9a317406612700426fad3efab0b7bbc467,
"dlm: allow multiple lockspace creates".
An extraneous 'else' slipped into a code fragment being moved from
release_lockspace() to dlm_release_lockspace(). The result of the
unwanted 'else' is that dlm threads and structures are not stopped
and cleaned up when the final dlm lockspace is removed. Trying to
create a new lockspace again afterward will fail with
"kmem_cache_create: duplicate cache dlm_conn" because the cache
was not previously destroyed.
Signed-off-by: David Teigland <teigland@redhat.com>
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Explain this SLAB_DESTROY_BY_RCU thing...
[hugh@veritas.com: add a pointer to comment in mm/slab.c]
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Jens Axboe <jens.axboe@oracle.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Christoph Lameter <cl@linux-foundation.org>
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
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In 2007, a0acd820807680d2ccc4ef3448387fcdbf152c73 changed the default
slab allocator to SLUB, but the SLAB help text still says SLAB is the
default. This change fixes that.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
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Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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FLASH_* and EPROM_* constants are unused, and clash with drivers:
drivers/atm/ambassador.h:257:1: warning: "FLASH_BASE" redefined
drivers/atm/ambassador.h:258:1: warning: "FLASH_SIZE" redefined
drivers/atm/iphase.h:332:1: warning: "EPROM_SIZE" redefined
so remove them.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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arch/arm/mm/dma-mapping.c: In function `dma_sync_sg_for_cpu':
arch/arm/mm/dma-mapping.c:588: warning: statement with no effect
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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git://git.kernel.org/pub/scm/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:
sched: fix init_idle()'s use of sched_clock()
sched: fix stale value in average load per task
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Signed-off-by: Rodolfo Giometti <giometti@linux.it>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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C2port implements a two wire serial communication protocol (bit
banging) designed to enable in-system programming, debugging, and
boundary-scan testing on low pin-count Silicon Labs devices.
Currently this code supports only flash programming through sysfs
interface but extensions shoud be easy to add.
Signed-off-by: Rodolfo Giometti <giometti@linux.it>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Add a brief document about omap2430/3430 HDQ/1-wire driver.
Signed-off-by: Madhusudhan Chikkature<madhu.cr@ti.com>
Acked-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Provide the BQ27000 slave interface driver.
Signed-off-by: Madhusudhan Chikkature<madhu.cr@ti.com>
Acked-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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The HDQ/1-Wire module of TI OMAP2430/3430 platforms implement the hardware
protocol of the master functions of the Benchmark HDQ and the Dallas
Semiconductor 1-Wire protocols. These protocols use a single wire for
communication between the master (HDQ/1-Wire controller) and the slave
(HDQ/1-Wire external compliant device).
This patch provides the HDQ driver to suppport TI OMAP2430/3430 platforms.
Signed-off-by: Madhusudhan Chikkature<madhu.cr@ti.com>
Acked-by: Felipe Balbi <felipe.balbi@nokia.com>
Acked-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Export the w1_read_8 function for use of drivers. The OMAP HDQ
driver(drivers/w1/masters/omap_hdq.c) uses this function.
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Madhusudhan Chikkature<madhu.cr@ti.com>
Acked-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Add support for the Dallas DS1390/93/94 SPI RTC chip.
Signed-off-by: Mark Jackson <mpfj@mimc.co.uk>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Provide the basic "get" and "set" functionality for the Epson RX-8581 I2C
RTC. It currently does not support the RTC's Alarm or Fixed-cycle timer.
[akpm@linux-foundation.org: need log2.h for ilog2(), remove unneeded initialisation]
Signed-off-by: Martyn Welch <martyn.welch@gefanuc.com>
Signed-off-by: Alessandro Zummo <a.zummo@towertech.it>
Cc: David Brownell <david-b@pacbell.net>
Cc: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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This adds support for the RTC provided by the Wolfson Microelectronics
WM8350.
This driver was originally written by Graeme Gregory and Liam Girdwood,
though it has been modified since then to update it to current mainline
coding standards and for API completeness.
[akpm@linux-foundation.org: s/schedule_timeout_interruptible/schedule_timeout_uninterruptible/ to prevent bogus timeout when signal_pending()]
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: David Brownell <david-b@pacbell.net>
Cc: Liam Girdwood <linux@wolfsonmicro.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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The ics932s401 is a clock generator chip. This driver allows users to
read the current clock outputs.
Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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New driver to play with. As Jean mentioned a couple of years ago, this
chip is a beast with odd combinations of 8 fans, 4 temperatures, and 13
voltage sensors. This driver has been tested on an IntelliStation Z30.
Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
Cc: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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This adds a driver to the accelerometer sensor found in several HP
laptops (under the commercial names of "HP Mobile Data Protection System
3D" and "HP 3D driveguard"). It tries to have more or less the same
interfaces as the hdaps and other accelerometer drivers: in sysfs and as
a joystick.
This driver was first written by Yan Burman. Eric Piel has updated it
and slimed it up (including the removal of an interface to access to the
free-fall feature of the sensor because it is not reliable enough for
now). Pavel Machek removed few more features and switched locking from
semaphore to mutex.
Several people have contributed to the database of the axes.
[eric.piel@tremplin-utc.net: LIS3LV02D: Conform to the new ACPI API]
Signed-off-by: Eric Piel <eric.piel@tremplin-utc.net>
Signed-off-by: Yan Burman <burman.yan@gmail.com>
Signed-off-by: Pavel Machek <pavel@suse.cz>
Cc: "Mark M. Hoffman" <mhoffman@lightlink.com>
Signed-off-by: Eric Piel <eric.piel@tremplin-utc.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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The start pfn calculation in page_cgroup's memory hotplug notifier chain
is wrong.
Tested-by: Badari Pulavarty <pbadari@us.ibm.com>
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: <linux-ext4@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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controller
We're working with an AT91SAM9263 Rev B in our design and I experienced
some inconsistency in spi-based touchscreen usage between our board and
the Atmel evaluation kit we have that runs on a Rev A chip.
The data was apparently delayed by 1 byte and got ridiculous data out of
the touchscreen driver, very strange. As everything looked normal in
the spi, touchscreen and dma logs, I contacted the Atmel support and
they triggered me on a new HW bug that appeared in the Rev B SPI
controller.
The problem is that the SPI controller on the Rev B needs that the
software reset is performed two times so that it's performed correctly.
Applying the patch below solves the issue on my Rev B board. I've tested
it as well on my Rev A evaluation kit and it has apparently no unwanted
side effect, things continue to work as expected.
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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The adt7468 is a follow-on to the adt7463, so plumb in adt7468 support
along the same code paths.
Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
Cc: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Implement correct range checking for adt7470 to prevent userland from
writing impossible values into the chip, and cap out-of-range values per
standard hwmon conventions.
Implement correct rounding of input values per standard hwmon conventions.
Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
Cc: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Implement correct range checking for adt7470 to prevent userland from
writing impossible values into the chip, and cap out-of-range values per
standard hwmon conventions.
Implement correct rounding of input values per standard hwmon conventions.
Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
Cc: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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We only need the cacheline padding on SMP kernels. Saves 6k:
text data bss dec hex filename
5713 388 8840 14941 3a5d kernel/kprobes.o
5713 388 2632 8733 221d kernel/kprobes.o
Acked-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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xip documentation updated:
- change "get_xip_page" to "get_xip_mem";
- explain changed function parameters
Signed-off-by: Marco Stornelli <marco.stornelli@gmail.com>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Add printk-formats.txt so that we don't have to keep fixing the
same things over and over again. <wishful thinking>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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It mistakenly assumes that a static local in an inlined function is a
kernel-wide singleton. It also has no callers, so let's remove it.
Cc: Dave Young <hidave.darkstar@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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In the last refactoring of shrink_submounts a variable was not completely
renamed. So finish the renaming of mnt to m now.
Without this if you attempt to mount an nfs mount that has both automatic
nfs sub mounts on it, and has normal mounts on it. The unmount will
succeed when it should not.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Al Viro <viro@ZenIV.linux.org.uk
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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lockdep warns about following message at boot time on one of my test
machine. Then, schedule_on_each_cpu() sholdn't be called when the task
have mmap_sem.
Actually, lru_add_drain_all() exist to prevent the unevictalble pages
stay on reclaimable lru list. but currenct unevictable code can rescue
unevictable pages although it stay on reclaimable list.
So removing is better.
In addition, this patch add lru_add_drain_all() to sys_mlock() and
sys_mlockall(). it isn't must. but it reduce the failure of moving to
unevictable list. its failure can rescue in vmscan later. but reducing
is better.
Note, if above rescuing happend, the Mlocked and the Unevictable field
mismatching happend in /proc/meminfo. but it doesn't cause any real
trouble.
=======================================================
[ INFO: possible circular locking dependency detected ]
2.6.28-rc2-mm1 #2
-------------------------------------------------------
lvm/1103 is trying to acquire lock:
(&cpu_hotplug.lock){--..}, at: [<c0130789>] get_online_cpus+0x29/0x50
but task is already holding lock:
(&mm->mmap_sem){----}, at: [<c01878ae>] sys_mlockall+0x4e/0xb0
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #3 (&mm->mmap_sem){----}:
[<c0153da2>] check_noncircular+0x82/0x110
[<c0185e6a>] might_fault+0x4a/0xa0
[<c0156161>] validate_chain+0xb11/0x1070
[<c0185e6a>] might_fault+0x4a/0xa0
[<c0156923>] __lock_acquire+0x263/0xa10
[<c015714c>] lock_acquire+0x7c/0xb0 (*) grab mmap_sem
[<c0185e6a>] might_fault+0x4a/0xa0
[<c0185e9b>] might_fault+0x7b/0xa0
[<c0185e6a>] might_fault+0x4a/0xa0
[<c0294dd0>] copy_to_user+0x30/0x60
[<c01ae3ec>] filldir+0x7c/0xd0
[<c01e3a6a>] sysfs_readdir+0x11a/0x1f0 (*) grab sysfs_mutex
[<c01ae370>] filldir+0x0/0xd0
[<c01ae370>] filldir+0x0/0xd0
[<c01ae4c6>] vfs_readdir+0x86/0xa0 (*) grab i_mutex
[<c01ae75b>] sys_getdents+0x6b/0xc0
[<c010355a>] syscall_call+0x7/0xb
[<ffffffff>] 0xffffffff
-> #2 (sysfs_mutex){--..}:
[<c0153da2>] check_noncircular+0x82/0x110
[<c01e3d2c>] sysfs_addrm_start+0x2c/0xc0
[<c0156161>] validate_chain+0xb11/0x1070
[<c01e3d2c>] sysfs_addrm_start+0x2c/0xc0
[<c0156923>] __lock_acquire+0x263/0xa10
[<c015714c>] lock_acquire+0x7c/0xb0 (*) grab sysfs_mutex
[<c01e3d2c>] sysfs_addrm_start+0x2c/0xc0
[<c04f8b55>] mutex_lock_nested+0xa5/0x2f0
[<c01e3d2c>] sysfs_addrm_start+0x2c/0xc0
[<c01e3d2c>] sysfs_addrm_start+0x2c/0xc0
[<c01e3d2c>] sysfs_addrm_start+0x2c/0xc0
[<c01e422f>] create_dir+0x3f/0x90
[<c01e42a9>] sysfs_create_dir+0x29/0x50
[<c04faaf5>] _spin_unlock+0x25/0x40
[<c028f21d>] kobject_add_internal+0xcd/0x1a0
[<c028f37a>] kobject_set_name_vargs+0x3a/0x50
[<c028f41d>] kobject_init_and_add+0x2d/0x40
[<c019d4d2>] sysfs_slab_add+0xd2/0x180
[<c019d580>] sysfs_add_func+0x0/0x70
[<c019d5dc>] sysfs_add_func+0x5c/0x70 (*) grab slub_lock
[<c01400f2>] run_workqueue+0x172/0x200
[<c014008f>] run_workqueue+0x10f/0x200
[<c0140bd0>] worker_thread+0x0/0xf0
[<c0140c6c>] worker_thread+0x9c/0xf0
[<c0143c80>] autoremove_wake_function+0x0/0x50
[<c0140bd0>] worker_thread+0x0/0xf0
[<c0143972>] kthread+0x42/0x70
[<c0143930>] kthread+0x0/0x70
[<c01042db>] kernel_thread_helper+0x7/0x1c
[<ffffffff>] 0xffffffff
-> #1 (slub_lock){----}:
[<c0153d2d>] check_noncircular+0xd/0x110
[<c04f650f>] slab_cpuup_callback+0x11f/0x1d0
[<c0156161>] validate_chain+0xb11/0x1070
[<c04f650f>] slab_cpuup_callback+0x11f/0x1d0
[<c015433d>] mark_lock+0x35d/0xd00
[<c0156923>] __lock_acquire+0x263/0xa10
[<c015714c>] lock_acquire+0x7c/0xb0
[<c04f650f>] slab_cpuup_callback+0x11f/0x1d0
[<c04f93a3>] down_read+0x43/0x80
[<c04f650f>] slab_cpuup_callback+0x11f/0x1d0 (*) grab slub_lock
[<c04f650f>] slab_cpuup_callback+0x11f/0x1d0
[<c04fd9ac>] notifier_call_chain+0x3c/0x70
[<c04f5454>] _cpu_up+0x84/0x110
[<c04f552b>] cpu_up+0x4b/0x70 (*) grab cpu_hotplug.lock
[<c06d1530>] kernel_init+0x0/0x170
[<c06d15e5>] kernel_init+0xb5/0x170
[<c06d1530>] kernel_init+0x0/0x170
[<c01042db>] kernel_thread_helper+0x7/0x1c
[<ffffffff>] 0xffffffff
-> #0 (&cpu_hotplug.lock){--..}:
[<c0155bff>] validate_chain+0x5af/0x1070
[<c040f7e0>] dev_status+0x0/0x50
[<c0156923>] __lock_acquire+0x263/0xa10
[<c015714c>] lock_acquire+0x7c/0xb0
[<c0130789>] get_online_cpus+0x29/0x50
[<c04f8b55>] mutex_lock_nested+0xa5/0x2f0
[<c0130789>] get_online_cpus+0x29/0x50
[<c0130789>] get_online_cpus+0x29/0x50
[<c017bc30>] lru_add_drain_per_cpu+0x0/0x10
[<c0130789>] get_online_cpus+0x29/0x50 (*) grab cpu_hotplug.lock
[<c0140cf2>] schedule_on_each_cpu+0x32/0xe0
[<c0187095>] __mlock_vma_pages_range+0x85/0x2c0
[<c0156945>] __lock_acquire+0x285/0xa10
[<c0188f09>] vma_merge+0xa9/0x1d0
[<c0187450>] mlock_fixup+0x180/0x200
[<c0187548>] do_mlockall+0x78/0x90 (*) grab mmap_sem
[<c01878e1>] sys_mlockall+0x81/0xb0
[<c010355a>] syscall_call+0x7/0xb
[<ffffffff>] 0xffffffff
other info that might help us debug this:
1 lock held by lvm/1103:
#0: (&mm->mmap_sem){----}, at: [<c01878ae>] sys_mlockall+0x4e/0xb0
stack backtrace:
Pid: 1103, comm: lvm Not tainted 2.6.28-rc2-mm1 #2
Call Trace:
[<c01555fc>] print_circular_bug_tail+0x7c/0xd0
[<c0155bff>] validate_chain+0x5af/0x1070
[<c040f7e0>] dev_status+0x0/0x50
[<c0156923>] __lock_acquire+0x263/0xa10
[<c015714c>] lock_acquire+0x7c/0xb0
[<c0130789>] get_online_cpus+0x29/0x50
[<c04f8b55>] mutex_lock_nested+0xa5/0x2f0
[<c0130789>] get_online_cpus+0x29/0x50
[<c0130789>] get_online_cpus+0x29/0x50
[<c017bc30>] lru_add_drain_per_cpu+0x0/0x10
[<c0130789>] get_online_cpus+0x29/0x50
[<c0140cf2>] schedule_on_each_cpu+0x32/0xe0
[<c0187095>] __mlock_vma_pages_range+0x85/0x2c0
[<c0156945>] __lock_acquire+0x285/0xa10
[<c0188f09>] vma_merge+0xa9/0x1d0
[<c0187450>] mlock_fixup+0x180/0x200
[<c0187548>] do_mlockall+0x78/0x90
[<c01878e1>] sys_mlockall+0x81/0xb0
[<c010355a>] syscall_call+0x7/0xb
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Tested-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
Cc: Christoph Lameter <cl@linux-foundation.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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__register_kprobe() can be preempted after checking probing address but
before module_text_address() or try_module_get(), and in this interval
the module can be unloaded. In that case, try_module_get(probed_mod)
will access to invalid address, or kprobe will probe invalid address.
This patch uses preempt_disable() to protect it and uses
__module_text_address() and __kernel_text_address().
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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With this change, control file 'freezer.state' doesn't exist in root
cgroup, making root cgroup unfreezable.
I think it's reasonable to disallow freeze tasks in the root cgroup. And
then we can avoid fork overhead when freezer subsystem is compiled but not
used.
Also make writing invalid value to freezer.state returns EINVAL rather
than EIO. This is more consistent with other cgroup subsystem.
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Acked-by: Paul Menage <menage@google.com>
Cc: Cedric Le Goater <clg@fr.ibm.com>
Cc: Paul Menage <menage@google.com>
Cc: Matt Helsley <matthltc@us.ibm.com>
Cc: "Serge E. Hallyn" <serue@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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In theory the task can be moved to another cgroup and the freezer will be
freed right after task_lock is dropped, so the lock results in zero
protection.
But in the case of freezer_fork() no lock is needed, since the task is not
in tasklist yet so it won't be moved to another cgroup, so task->cgroups
won't be changed or invalidated.
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Cc: Matt Helsley <matthltc@us.ibm.com>
Cc: Cedric Le Goater <clg@fr.ibm.com>
Cc: "Serge E. Hallyn" <serue@us.ibm.com>
Cc: Paul Menage <menage@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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This driver supports the Xilinx XPS GPIO IP core which has the typical
GPIO features.
Signed-off-by: Kiran Sutariya <kirans@xilinx.com>
Signed-off-by: John Linn <john.linn@xilinx.com>
Cc: David Brownell <david-b@pacbell.net>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Kumar Gala <galak@gate.crashing.org>
Cc: "Grant Likely" <grant.likely@secretlab.ca>
Cc: <avorontsov@ru.mvista.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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If all allowable memory is unreclaimable, it is possible to loop forever
in the page allocator for ~__GFP_NORETRY allocations.
During this time, it is also possible for a task's cpuset to expand its
set of allowable nodes so that it now includes free memory. The cached
copy of this set, current->mems_allowed, is stale, however, since there
has not been a subsequent call to cpuset_update_task_memory_state().
The cached copy of the set of allowable nodes is now updated in the page
allocator's slow path so the additional memory is available to
get_page_from_freelist().
[akpm@linux-foundation.org: add comment]
Signed-off-by: David Rientjes <rientjes@google.com>
Cc: Paul Menage <menage@google.com>
Cc: Christoph Lameter <cl@linux-foundation.org>
Cc: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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|
It turns out that edac_mc_del_mc will kobject_put the last kref on the
mci object.
If the timing is just right, that means that the mci object is freed
before before i5000_remove_one has a chance to free the resources
associated with it, causing a null pointer exceptions when unloading the
driver. Insert a kobject_{get,put} pair so that this doesn't happen.
Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
Cc: Doug Thompson <norsk5@yahoo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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It turns out that if one registers a struct platform_device, the
platform device code expects that platform_device.device->driver points
to a struct driver inside a struct platform_driver.
This is not the case with the ipmi-si, ipmi-msghandler and ibmaem
drivers, which causes the suspend/resume hook functions to jump off into
nowhere, causing a crash. Make this assumption hold true for these
three drivers.
Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
Acked-by: Corey Minyard <cminyard@mvista.com>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Cc: Greg KH <greg@kroah.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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