sched: touch softlockup watchdog after idling

touch softlockup watchdog after idling.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/kernel/sched.c b/kernel/sched.c
index 5ae0d42..3df84ea 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -668,6 +668,7 @@
 	struct rq *rq = cpu_rq(smp_processor_id());
 	u64 now = sched_clock();
 
+	touch_softlockup_watchdog();
 	rq->idle_clock += delta_ns;
 	/*
 	 * Override the previous timestamp and ignore all