diff options
| author | Oleg Nesterov <oleg@redhat.com> | 2012-08-26 21:12:09 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2012-09-13 16:47:33 +0200 |
| commit | ac3d0da8f3290b3d394cdb7f50604424a7cd6092 (patch) | |
| tree | c1a126ac8ab3d87f22baaa51fd786f3c56c22327 /include/linux/task_work.h | |
| parent | 15674868d6c5985466835c56dd89d39235f16302 (diff) | |
task_work: Make task_work_add() lockless
Change task_work's to use llist-like code to avoid pi_lock
in task_work_add(), this makes it useable under rq->lock.
task_work_cancel() and task_work_run() still use pi_lock
to synchronize with each other.
(This is in preparation for a deadlock fix.)
Suggested-by: Peter Zijlstra <peterz@infradead.org>
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/20120826191209.GA4221@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/task_work.h')
0 files changed, 0 insertions, 0 deletions