Subject: hrtimer: Raise softirq if hrtimer irq stalled
From: Watanabe <shunsuke.watanabe@tel.com>
Date: Sun, 28 Oct 2012 11:13:44 +0100

When the hrtimer stall detection hits the softirq is not raised.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

---
 kernel/time/hrtimer.c |    9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

--- a/kernel/time/hrtimer.c
+++ b/kernel/time/hrtimer.c
@@ -1519,11 +1519,7 @@ void hrtimer_interrupt(struct clock_even
 	if (expires_next.tv64 == KTIME_MAX ||
 	    !tick_program_event(expires_next, 0)) {
 		cpu_base->hang_detected = 0;
-
-		if (raise)
-			raise_softirq_irqoff(HRTIMER_SOFTIRQ);
-
-		return;
+		goto out;
 	}
 
 	/*
@@ -1567,6 +1563,9 @@ void hrtimer_interrupt(struct clock_even
 	tick_program_event(expires_next, 1);
 	printk_once(KERN_WARNING "hrtimer: interrupt took %llu ns\n",
 		    ktime_to_ns(delta));
+out:
+	if (raise)
+		raise_softirq_irqoff(HRTIMER_SOFTIRQ);
 }
 
 /*