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Groups > linux.kernel > #1280469

[PATCH] sched: remove false-positive warning from wake_up_process()

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Futex can have a spurious wake up before we actually wake it up on our own,
which will trigger this warning if the task is still stopped.

Fixes: 9067ac85d533651b98c2ff903182a20cbb361fcb ("wake_up_process() should be never used to wakeup a TASK_STOPPED/TRACED task")
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
---
 kernel/sched/core.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 4d568ac..fc8c987 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -2039,7 +2039,6 @@ out:
  */
 int wake_up_process(struct task_struct *p)
 {
-	WARN_ON(task_is_stopped_or_traced(p));
 	return try_to_wake_up(p, TASK_NORMAL, 0);
 }
 EXPORT_SYMBOL(wake_up_process);
-- 
2.5.0

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Thread

[PATCH] sched: remove false-positive warning from wake_up_process() Sasha Levin <sasha.levin@oracle.com> - 2015-12-01 02:40 +0100
  Re: [PATCH] sched: remove false-positive warning from wake_up_process() Linus Torvalds <torvalds@linux-foundation.org> - 2015-12-01 02:50 +0100
    Re: [PATCH] sched: remove false-positive warning from  wake_up_process() Rik van Riel <riel@redhat.com> - 2015-12-01 03:50 +0100
      Re: [PATCH] sched: remove false-positive warning from wake_up_process() Linus Torvalds <torvalds@linux-foundation.org> - 2015-12-01 04:20 +0100
  Re: [PATCH] sched: remove false-positive warning from  wake_up_process() Peter Zijlstra <peterz@infradead.org> - 2015-12-03 13:40 +0100
    Re: [PATCH] sched: remove false-positive warning from wake_up_process() Linus Torvalds <torvalds@linux-foundation.org> - 2015-12-03 19:20 +0100
  [tip:locking/core] sched/core:   Remove false-positive warning from wake_up_process() tip-bot for Sasha Levin <tipbot@zytor.com> - 2015-12-04 13:00 +0100

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