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| author |   Kirill Tkhai <tkhai@yandex.ru> | 2013-07-04 22:48:20 +0400 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2013-07-12 13:54:03 +0200 |
| commit | cedce3e730833d26a37826a96e1905b6ef387df9 (patch) | |
| tree | 10c980e22742f188d40366d2745bfe8c5712f15c /kernel/sched | |
| parent | sched: Fix HRTICK (diff) | |
| download | linux-dev-cedce3e730833d26a37826a96e1905b6ef387df9.tar.xz linux-dev-cedce3e730833d26a37826a96e1905b6ef387df9.zip | |
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>
Diffstat (limited to 'kernel/sched')
| -rw-r--r-- | kernel/sched/core.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 0d8eb4525e76..f73787159188 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); |