diff --git a/[refs] b/[refs]
index ad617605ed1c..f5bffa1d81df 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: bb29ab26863c022743143f27956cc0ca362f258c
+refs/heads/master: 1b9f19c2125dd1021b9327111dc40b14b557ee12
diff --git a/trunk/kernel/sched.c b/trunk/kernel/sched.c
index 6150cd70f448..2d23450e7614 100644
--- a/trunk/kernel/sched.c
+++ b/trunk/kernel/sched.c
@@ -67,13 +67,6 @@ unsigned long long __attribute__((weak)) sched_clock(void)
 	return (unsigned long long)jiffies * (1000000000 / HZ);
 }
 
-/*
- * CPU frequency is/was unstable - start new by setting prev_clock_raw:
- */
-void sched_clock_unstable_event(void)
-{
-}
-
 /*
  * Convert user-nice values [ -20 ... 0 ... 19 ]
  * to static priority [ MAX_RT_PRIO..MAX_PRIO-1 ],
@@ -629,6 +622,20 @@ static inline struct rq *this_rq_lock(void)
 	return rq;
 }
 
+/*
+ * CPU frequency is/was unstable - start new by setting prev_clock_raw:
+ */
+void sched_clock_unstable_event(void)
+{
+	unsigned long flags;
+	struct rq *rq;
+
+	rq = task_rq_lock(current, &flags);
+	rq->prev_clock_raw = sched_clock();
+	rq->clock_unstable_events++;
+	task_rq_unlock(rq, &flags);
+}
+
 /*
  * resched_task - mark a task 'to be rescheduled now'.
  *