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wake_up_process() should be never used to wakeup a TASK_STOPPED/TRACED task

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wake_up_process() should never wakeup a TASK_STOPPED/TRACED task.
Change it to use TASK_NORMAL and add the WARN_ON().

TASK_ALL has no other users, probably can be killed.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Oleg Nesterov 2013-01-21 20:48:17 +01:00 committed by Linus Torvalds
parent 9899d11f65
commit 9067ac85d5
1 changed files with 2 additions and 1 deletions
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3
kernel/sched/core.c
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@ -1523,7 +1523,8 @@ static void try_to_wake_up_local(struct task_struct *p)
*/
int wake_up_process(struct task_struct *p)
{
return try_to_wake_up(p, TASK_ALL, 0);
WARN_ON(task_is_stopped_or_traced(p));
return try_to_wake_up(p, TASK_NORMAL, 0);
}
EXPORT_SYMBOL(wake_up_process);