X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=kernel%2Fsched%2Fdeadline.c;h=ce852643854bbe184e3b25d61fc249c9e3bac0fd;hb=2fff347cce2d1538556ab3127f7224f6b522575e;hp=6e79b3faa4cd5384754232dc3b74300367afec8e;hpb=3bf7706b159d194430ded9fc064b3e114f503d7f;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
index 6e79b3f..ce85264 100644
--- a/kernel/sched/deadline.c
+++ b/kernel/sched/deadline.c
@@ -490,9 +490,17 @@ static enum hrtimer_restart dl_task_timer(struct hrtimer *timer)
 						     struct sched_dl_entity,
 						     dl_timer);
 	struct task_struct *p = dl_task_of(dl_se);
-	struct rq *rq = task_rq(p);
+	struct rq *rq;
+again:
+	rq = task_rq(p);
 	raw_spin_lock(&rq->lock);
 
+	if (rq != task_rq(p)) {
+		/* Task was moved, retrying. */
+		raw_spin_unlock(&rq->lock);
+		goto again;
+	}
+
 	/*
 	 * We need to take care of a possible races here. In fact, the
 	 * task might have changed its scheduling policy to something