Messages in this thread Patch in this message | | | Date | Fri, 12 Jul 2013 06:29:49 -0700 | From | tip-bot for Kirill Tkhai <> | Subject | [tip:sched/core] sched/__wake_up_sync_key(): Fix nr_exclusive tasks which lead to WF_SYNC clearing |
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Commit-ID: cedce3e730833d26a37826a96e1905b6ef387df9 Gitweb: http://git.kernel.org/tip/cedce3e730833d26a37826a96e1905b6ef387df9 Author: Kirill Tkhai <tkhai@yandex.ru> AuthorDate: Thu, 4 Jul 2013 22:48:20 +0400 Committer: Ingo Molnar <mingo@kernel.org> CommitDate: Fri, 12 Jul 2013 13:54:03 +0200
sched/__wake_up_sync_key(): Fix nr_exclusive tasks which lead to WF_SYNC clearing
Only one task can replace the waker.
Signed-off-by: Kirill Tkhai <tkhai@yandex.ru> CC: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/512421372963700@web25f.yandex.ru Signed-off-by: Ingo Molnar <mingo@kernel.org> --- kernel/sched/core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 0d8eb45..f737871 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -2660,7 +2660,7 @@ void __wake_up_sync_key(wait_queue_head_t *q, unsigned int mode, if (unlikely(!q)) return; - if (unlikely(!nr_exclusive)) + if (unlikely(nr_exclusive != 1)) wake_flags = 0; spin_lock_irqsave(&q->lock, flags);
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