Oleg Nesterov 9da33de624 task_work: task_work_add() should not succeed after exit_task_work() ... ed3e694d "move exit_task_work() past exit_files() et.al" destroyed the add/exit synchronization we had, the caller itself should ensure task_work_add() can't race with the exiting task. However, this is not convenient/simple, and the only user which tries to do this is buggy (see the next patch). Unless the task is current, there is simply no way to do this in general. Change exit_task_work()->task_work_run() to use the dummy "work_exited" entry to let task_work_add() know it should fail. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20120826191211.GA4228@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>		2012-09-13 16:47:34 +02:00
..
acpi	Merge branches 'delete-gts-bfs', 'misc', 'novell-bugzilla-757888-numa' and 'osc-pcie' into base	2012-08-03 00:31:23 -04:00
asm-generic	mutex: Place lock in contended state after fastpath_lock failure	2012-08-13 18:46:54 +02:00
crypto
drm	drm: Check for invalid cursor flags	2012-08-24 09:38:40 +10:00
keys
linux	task_work: task_work_add() should not succeed after exit_task_work()	2012-09-13 16:47:34 +02:00
math-emu
media
memory
misc
mtd
net	Merge branch 'master' of git://1984.lsi.us.es/nf	2012-08-31 13:06:37 -04:00
pcmcia
ras
rdma
rxrpc
scsi
sound	ASoC: Additional updates for 3.6	2012-08-20 21:26:04 +02:00
target	target: Remove unused se_cmd.cmd_spdtl	2012-08-21 14:27:35 -07:00
trace	Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2012-08-03 10:57:20 -07:00
video
xen	Revert "xen PVonHVM: move shared_info to MMIO before kexec"	2012-08-16 13:05:25 -04:00
Kbuild