Tejun Heo 727fa37e40 Revert "cgroup: Drop task_lock(parent) on cgroup_fork()" ... commit 9bb71308b8 upstream. This reverts commit 7e381b0eb1. The commit incorrectly assumed that fork path always performed threadgroup_change_begin/end() and depended on that for synchronization against task exit and cgroup migration paths instead of explicitly grabbing task_lock(). threadgroup_change is not locked when forking a new process (as opposed to a new thread in the same process) and even if it were it wouldn't be effective as different processes use different threadgroup locks. Revert the incorrect optimization. Signed-off-by: Tejun Heo <tj@kernel.org> LKML-Reference: <20121008020000.GB2575@localhost> Acked-by: Li Zefan <lizefan@huawei.com> Bitterly-Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2012-10-28 10:14:14 -07:00
..
debug	kdb,vt_console: Fix missed data due to pager overruns	2012-10-21 09:27:59 -07:00
events	perf_event: Switch to internal refcount, fix race with close()	2012-10-02 10:29:54 -07:00
gcov
irq	random: remove rand_initialize_irq()	2012-08-15 08:10:29 -07:00
power	ftrace: Disable function tracing during suspend/resume and hibernation, again	2012-08-09 08:31:29 -07:00
sched	sched: Fix migration thread runtime bogosity	2012-10-13 05:39:01 +09:00
time	time: Move ktime_t overflow checking into timespec_valid_strict	2012-10-02 10:30:36 -07:00
trace	splice: fix racy pipe->buffers uses	2012-07-16 09:04:42 -07:00
.gitignore
acct.c
async.c	Fix a dead loop in async_synchronize_full()	2012-10-02 10:30:35 -07:00
audit_tree.c	audit: fix refcounting in audit-tree	2012-09-14 10:00:18 -07:00
audit_watch.c
audit.c	constify path argument of audit_log_d_path()	2012-03-20 21:29:40 -04:00
audit.h
auditfilter.c
auditsc.c
backtracetest.c
bounds.c
capability.c
cgroup_freezer.c
cgroup.c	Revert "cgroup: Drop task_lock(parent) on cgroup_fork()"	2012-10-28 10:14:14 -07:00
compat.c	compat: Fix RT signal mask corruption via sigprocmask	2012-05-10 08:58:33 -07:00
configs.c
cpu_pm.c
cpu.c
cpuset.c	CPU hotplug, cpusets, suspend: Don't modify cpusets during suspend/resume	2012-10-13 05:38:57 +09:00
crash_dump.c
cred.c	cred: copy_process() should clear child->replacement_session_keyring	2012-04-11 08:20:11 -07:00
delayacct.c
dma.c	Remove all #inclusions of asm/system.h	2012-03-28 18:30:03 +01:00
elfcore.c
exec_domain.c
exit.c	posix_types.h: Cleanup stale __NFDBITS and related definitions	2012-08-09 08:31:39 -07:00
extable.c
fork.c	mm/fork: fix overflow in vma length when copying mmap on clone	2012-06-10 00:36:06 +09:00
freezer.c
futex_compat.c	futex: Mark get_robust_list as deprecated	2012-03-29 11:37:17 +02:00
futex.c	futex: Forbid uaddr == uaddr2 in futex_wait_requeue_pi()	2012-08-09 08:31:53 -07:00
groups.c
hrtimer.c	hrtimer: Update hrtimer base offsets each hrtimer_interrupt	2012-07-19 08:59:00 -07:00
hung_task.c
irq_work.c	irq_work: fix compile failure on tile from missing include	2012-04-13 13:15:16 -04:00
itimer.c	itimer: Use printk_once instead of WARN_ONCE	2012-04-10 11:00:30 +02:00
jump_label.c
kallsyms.c
Kconfig.freezer
Kconfig.hz
Kconfig.locks	locking/kconfig: Simplify INLINE_SPIN_UNLOCK usage	2012-03-23 13:18:57 +01:00
Kconfig.preempt	locking/kconfig: Simplify INLINE_SPIN_UNLOCK usage	2012-03-23 13:18:57 +01:00
kexec.c	Merge branch 'akpm' (Andrew's patch-bomb)	2012-03-28 17:19:28 -07:00
kfifo.c
kmod.c	PM / Sleep: Mitigate race between the freezer and request_firmware()	2012-03-28 23:30:28 +02:00
kprobes.c
ksysfs.c
kthread.c	kthread_worker: reimplement flush_kthread_work() to allow freeing the work item being executed	2012-10-02 10:30:40 -07:00
latencytop.c
lockdep_internals.h
lockdep_proc.c
lockdep_states.h
lockdep.c
Makefile
module.c	module: taint kernel when lve module is loaded	2012-10-21 09:27:59 -07:00
mutex-debug.c
mutex-debug.h
mutex.c
mutex.h
notifier.c
nsproxy.c
padata.c	padata: Fix cpu hotplug	2012-03-29 19:52:46 +08:00
panic.c	kdump: Execute kmsg_dump(KMSG_DUMP_PANIC) after smp_send_stop()	2012-06-22 11:36:56 -07:00
params.c	params: <level>_initcall-like kernel parameters	2012-03-26 12:50:51 +10:30
pid_namespace.c	pidns: add reboot_pid_ns() to handle the reboot syscall	2012-03-28 17:14:36 -07:00
pid.c
posix-cpu-timers.c
posix-timers.c
printk.c	Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2012-03-20 10:31:44 -07:00
profile.c
ptrace.c	ptrace: remove PTRACE_SEIZE_DEVEL bit	2012-03-23 16:58:41 -07:00
range.c
rcu.h
rcupdate.c
rcutiny_plugin.h
rcutiny.c
rcutorture.c
rcutree_plugin.h
rcutree_trace.c
rcutree.c	rcu: Fix day-one dyntick-idle stall-warning bug	2012-10-13 05:38:55 +09:00
rcutree.h
relay.c	splice: fix racy pipe->buffers uses	2012-07-16 09:04:42 -07:00
res_counter.c
resource.c
rtmutex_common.h
rtmutex-debug.c
rtmutex-debug.h
rtmutex-tester.c
rtmutex.c
rtmutex.h
rwsem.c	Remove all #inclusions of asm/system.h	2012-03-28 18:30:03 +01:00
seccomp.c
semaphore.c
signal.c	Disintegrate and delete asm/system.h	2012-03-28 15:58:21 -07:00
smp.c	smp: add func to IPI cpus based on parameter func	2012-03-28 17:14:35 -07:00
softirq.c	Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2012-03-20 10:32:09 -07:00
spinlock.c	locking/kconfig: Simplify INLINE_SPIN_UNLOCK usage	2012-03-23 13:18:57 +01:00
srcu.c
stacktrace.c
stop_machine.c
sys_ni.c
sys.c	use clamp_t in UNAME26 fix	2012-10-28 10:14:13 -07:00
sysctl_binary.c
sysctl.c	sysctl: fix write access to dmesg_restrict/kptr_restrict	2012-04-05 14:51:43 +10:00
taskstats.c
test_kprobes.c
time.c	time: Remove bogus comments	2012-03-15 18:17:55 -07:00
timeconst.pl
timer.c	timers: Fix endless looping between cascade() and internal_add_timer()	2012-10-21 09:27:59 -07:00
tracepoint.c
tsacct.c
uid16.c
up.c
user_namespace.c
user-return-notifier.c
user.c
utsname_sysctl.c
utsname.c
wait.c
watchdog.c	kernel/watchdog.c: add comment to watchdog() exit path	2012-03-23 16:58:32 -07:00
workqueue_sched.h
workqueue.c	workqueue: add missing smp_wmb() in process_one_work()	2012-10-13 05:38:39 +09:00