Rafael J. Wysocki 25f2f3daad snapshot: Use pm_mutex for mutual exclusion ... We can avoid taking the BKL in snapshot_ioctl() if pm_mutex is used to prevent the ioctls from being executed concurrently. In addition, although it is only possible to open /dev/snapshot once, the task which has done that may spawn a child that will inherit the open descriptor, so in theory they can call snapshot_write(), snapshot_read() and snapshot_release() concurrently. pm_mutex can also be used for mutual exclusion in such cases. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Andi Kleen <ak@linux.intel.com> Acked-by: Pavel Machek <pavel@suse.cz> Signed-off-by: Len Brown <len.brown@intel.com>		2008-07-16 23:27:03 +02:00
..
irq	genirq: remove extraneous checks in manage.c	2008-07-10 07:01:13 +02:00
power	snapshot: Use pm_mutex for mutual exclusion	2008-07-16 23:27:03 +02:00
time	Merge branch 'generic-ipi' into generic-ipi-for-linus	2008-07-15 21:55:59 +02:00
trace	Merge branch 'tracing/ftrace' into auto-ftrace-next	2008-07-14 15:58:35 +02:00
.gitignore
acct.c
audit_tree.c	[PATCH] list_for_each_rcu must die: audit	2008-05-17 03:30:23 -04:00
audit.c	[PATCH] remove useless argument type in audit_filter_user()	2008-06-24 23:36:35 -04:00
audit.h
auditfilter.c	[PATCH] remove useless argument type in audit_filter_user()	2008-06-24 23:36:35 -04:00
auditsc.c
backtracetest.c	backtrace: replace timer with tasklet + completions	2008-06-27 18:09:16 +02:00
bounds.c
capability.c	security: filesystem capabilities: fix fragile setuid fixup code	2008-07-04 10:40:08 -07:00
cgroup_debug.c
cgroup.c	cgroups: remove node_ prefix_from ns subsystem	2008-05-24 09:56:14 -07:00
compat.c
configs.c
cpu.c	force offline the processor during hot-removal	2008-07-16 23:27:01 +02:00
cpuset.c	Merge commit 'v2.6.26' into sched/devel	2008-07-14 12:19:19 +02:00
delayacct.c
dma.c
exec_domain.c
exit.c	block: blkdev.h cleanup, move iocontext stuff to iocontext.h	2008-07-03 13:21:14 +02:00
extable.c
fork.c	Merge branch 'core/locking' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2008-07-14 14:55:13 -07:00
futex_compat.c
futex.c	futexes: fix fault handling in futex_lock_pi	2008-06-23 13:31:15 +02:00
hrtimer.c	Merge branch 'generic-ipi' into generic-ipi-for-linus	2008-07-15 21:55:59 +02:00
itimer.c
kallsyms.c
Kconfig.hz
Kconfig.preempt
kexec.c
kfifo.c
kgdb.c	kgdb: sparse fix	2008-06-24 10:52:55 -05:00
kmod.c	[PATCH] split linux/file.h	2008-05-01 13:08:16 -04:00
kprobes.c	kernel/kprobes.c: Made kprobe_blacklist static.	2008-07-10 10:13:51 -07:00
ksysfs.c
kthread.c	Freezer: Introduce PF_FREEZER_NOSIG	2008-07-16 23:27:03 +02:00
latencytop.c
lockdep_internals.h	lockdep: add lock_class information to lock_chain and output it	2008-06-24 01:28:20 +02:00
lockdep_proc.c	lockdep: add lock_class information to lock_chain and output it	2008-06-24 01:28:20 +02:00
lockdep.c	Merge branch 'core/locking' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2008-07-14 14:55:13 -07:00
Makefile	Merge branch 'generic-ipi' into generic-ipi-for-linus	2008-07-15 21:55:59 +02:00
marker.c	Markers - remove extra format argument	2008-05-23 22:25:27 +02:00
module.c	modules: proper cleanup of kobject without CONFIG_SYSFS	2008-05-23 13:09:33 +10:00
mutex-debug.c	mutex-debug: check mutex magic before owner	2008-05-16 16:53:35 +02:00
mutex-debug.h
mutex.c	__mutex_lock_common: use signal_pending_state()	2008-06-10 11:45:09 +02:00
mutex.h
notifier.c
ns_cgroup.c
nsproxy.c
panic.c
params.c
pid_namespace.c
pid.c	rcu: split list.h and move rcu-protected lists into rculist.h	2008-05-19 10:01:37 +02:00
pm_qos_params.c	pm_qos_params: BKL pushdown	2008-07-02 15:06:24 -06:00
posix-cpu-timers.c	posix-timers: print RT watchdog message	2008-05-24 18:49:22 +02:00
posix-timers.c
printk.c	Merge branch 'core/printk' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2008-07-14 15:27:43 -07:00
profile.c	on_each_cpu(): kill unused 'retry' parameter	2008-06-26 11:24:38 +02:00
ptrace.c	Security: split proc ptrace checking into read vs. attach	2008-07-14 15:01:47 +10:00
rcuclassic.c	Merge branch 'core/rcu' into core/rcu-for-linus	2008-07-15 21:10:12 +02:00
rcupdate.c	Merge branch 'generic-ipi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2008-07-15 14:12:03 -07:00
rcupreempt_trace.c	rcu: remove duplicated include in kernel/rcupreempt_trace.c	2008-05-19 10:03:39 +02:00
rcupreempt.c	Merge branch 'core/rcu' into core/rcu-for-linus	2008-07-15 21:10:12 +02:00
rcutorture.c	rcu: make rcutorture even more vicious: invoke RCU readers from irq handlers (timers)	2008-06-26 09:24:33 +02:00
relay.c	splice: fix sendfile() issue with relay	2008-05-28 14:49:27 +02:00
res_counter.c
resource.c
rtmutex_common.h
rtmutex-debug.c
rtmutex-debug.h
rtmutex-tester.c
rtmutex.c
rtmutex.h
rwsem.c
sched_clock.c	Merge branch 'sched/clock' into sched/devel	2008-07-14 12:19:13 +02:00
sched_cpupri.c	sched: use a 2-d bitmap for searching lowest-pri CPU	2008-06-06 15:19:28 +02:00
sched_cpupri.h	sched: fix the cpuprio count really	2008-06-06 15:19:44 +02:00
sched_debug.c	sched: add full schedstats to /proc/sched_debug	2008-06-27 14:31:31 +02:00
sched_fair.c	sched: add avg-overlap support to RT tasks	2008-07-04 12:50:22 +02:00
sched_features.h	sched: bias effective_load() error towards failing wake_affine().	2008-06-27 14:31:47 +02:00
sched_idletask.c	sched: make rt_sched_class, idle_sched_class static	2008-05-05 23:56:17 +02:00
sched_rt.c	sched: make sched_{rt,fair}.c ifdefs more readable	2008-06-27 14:32:05 +02:00
sched_stats.h	sched: fix accounting in task delay accounting & migration	2008-07-04 12:50:23 +02:00
sched.c	Merge branch 'core/softirq' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2008-07-14 15:28:42 -07:00
seccomp.c
semaphore.c	mmiotrace broken in linux-next (8-bit writes only)	2008-07-01 10:14:06 +02:00
signal.c	posix timers: discard SI_TIMER signals on exec	2008-05-26 10:37:07 -07:00
smp.c	generic ipi function calls: wait on alloc failure fallback	2008-07-15 14:12:20 -07:00
softirq.c	Merge branch 'generic-ipi' into generic-ipi-for-linus	2008-07-15 21:55:59 +02:00
softlockup.c	softlockup: print a module list on being stuck	2008-07-05 08:51:24 +02:00
spinlock.c	ftrace: lockdep notrace annotations	2008-05-23 20:39:40 +02:00
srcu.c
stacktrace.c	stacktrace: fix modular build, export print_stack_trace and save_stack_trace	2008-06-30 09:20:55 +02:00
stop_machine.c	sched: add new API sched_setscheduler_nocheck: add a flag to control access checks	2008-06-23 22:57:56 +02:00
sys_ni.c
sys.c	sys_prctl(): fix return of uninitialized value	2008-05-24 09:56:13 -07:00
sysctl_check.c
sysctl.c	Merge branch 'core/rcu' into core/rcu-for-linus	2008-07-15 21:10:12 +02:00
taskstats.c
test_kprobes.c
time.c	Make constants in kernel/timeconst.h fixed 64 bits	2008-05-02 16:18:42 -07:00
timeconst.pl	Make constants in kernel/timeconst.h fixed 64 bits	2008-05-02 16:18:42 -07:00
timer.c	Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm	2008-07-14 16:06:58 -07:00
tsacct.c
uid16.c
user_namespace.c
user.c
utsname_sysctl.c
utsname.c
wait.c
workqueue.c	Christoph has moved	2008-07-04 10:40:04 -07:00