From 5cafd7a534aea996c8c426352ede1ef964e360de Mon Sep 17 00:00:00 2001
From: Ingo Molnar <mingo@elte.hu>
Date: Wed, 30 Jan 2008 13:30:03 +0100
Subject: [PATCH] --- yaml --- r: 79699 b: refs/heads/master c:
 45fe4fe19120a22f7339f5bb110447170c25fca9 h: refs/heads/master i:   79697:
 c05cacde029fc8b022075b9869e25558707f0408   79695:
 1506c9b6eea8502355e84584887e29e2e5f70f9d v: v3

---
 [refs]                          |  2 +-
 trunk/kernel/time/clockevents.c | 13 +++++++++++++
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index 50fe8e647547..e42382033fa1 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 1a0c009ac53de4a7664a1239936f0bc258133156
+refs/heads/master: 45fe4fe19120a22f7339f5bb110447170c25fca9
diff --git a/trunk/kernel/time/clockevents.c b/trunk/kernel/time/clockevents.c
index 5fb139fef9fa..3e59fce6dd43 100644
--- a/trunk/kernel/time/clockevents.c
+++ b/trunk/kernel/time/clockevents.c
@@ -41,6 +41,11 @@ unsigned long clockevent_delta2ns(unsigned long latch,
 {
 	u64 clc = ((u64) latch << evt->shift);
 
+	if (unlikely(!evt->mult)) {
+		evt->mult = 1;
+		WARN_ON(1);
+	}
+
 	do_div(clc, evt->mult);
 	if (clc < 1000)
 		clc = 1000;
@@ -151,6 +156,14 @@ static void clockevents_notify_released(void)
 void clockevents_register_device(struct clock_event_device *dev)
 {
 	BUG_ON(dev->mode != CLOCK_EVT_MODE_UNUSED);
+	/*
+	 * A nsec2cyc multiplicator of 0 is invalid and we'd crash
+	 * on it, so fix it up and emit a warning:
+	 */
+	if (unlikely(!dev->mult)) {
+		dev->mult = 1;
+		WARN_ON(1);
+	}
 
 	spin_lock(&clockevents_lock);