diff --git a/[refs] b/[refs]
index edb7a4dea834..b89516469429 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: a04b61d3dc68857dcc81a5761268c96056742fb2
+refs/heads/master: b50f60ceeef2e38e529737c0260d9543939915ad
diff --git a/trunk/kernel/sched.c b/trunk/kernel/sched.c
index de440b220b4c..a2be2d055299 100644
--- a/trunk/kernel/sched.c
+++ b/trunk/kernel/sched.c
@@ -6766,6 +6766,11 @@ void __init sched_init(void)
 	}
 
 	set_load_weight(&init_task);
+
+#ifdef CONFIG_RT_MUTEXES
+	plist_head_init(&init_task.pi_waiters, &init_task.pi_lock);
+#endif
+
 	/*
 	 * The boot idle thread does lazy MMU switching as well:
 	 */