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* [PATCH -tip] locking/mutex: Explicitly mark task as running after wakeup
@ 2015-01-20  1:39 Davidlohr Bueso
  2015-02-04 14:37 ` [tip:locking/core] " tip-bot for Davidlohr Bueso
  0 siblings, 1 reply; 2+ messages in thread
From: Davidlohr Bueso @ 2015-01-20  1:39 UTC (permalink / raw)
  To: Peter Zijlstra, Ingo Molnar; +Cc: Paul E. McKenney, lkml, Davidlohr Bueso

By the time we wake up and get the lock after being asleep
in the slowpath, we better be running. As good practice,
be explicit about this and avoid any mischief.

Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
---
 kernel/locking/mutex.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/locking/mutex.c b/kernel/locking/mutex.c
index c67a60b..5740706 100644
--- a/kernel/locking/mutex.c
+++ b/kernel/locking/mutex.c
@@ -587,6 +587,8 @@ __mutex_lock_common(struct mutex *lock, long state, unsigned int subclass,
 		schedule_preempt_disabled();
 		spin_lock_mutex(&lock->wait_lock, flags);
 	}
+	__set_task_state(task, TASK_RUNNING);
+
 	mutex_remove_waiter(lock, &waiter, current_thread_info());
 	/* set it to 0 if there are no waiters left: */
 	if (likely(list_empty(&lock->wait_list)))
-- 
2.1.2




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