diff --git a/[refs] b/[refs]
index eb6f9a946d80..e47a4abcfccb 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: ac7d550499e225efb51a53d0b00667f26b93bdff
+refs/heads/master: 571f6d2fb0b1c04798df783db2ba85e96bcce43d
diff --git a/trunk/kernel/sched.c b/trunk/kernel/sched.c
index f04add905bdf..fdd26fffaa20 100644
--- a/trunk/kernel/sched.c
+++ b/trunk/kernel/sched.c
@@ -2915,6 +2915,9 @@ static inline int wake_priority_sleeper(struct rq *rq)
 	int ret = 0;
 
 #ifdef CONFIG_SCHED_SMT
+	if (!rq->nr_running)
+		return 0;
+
 	spin_lock(&rq->lock);
 	/*
 	 * If an SMT sibling task has been put to sleep for priority