From 475c3bacf204ee6dafe470438066fe272ec717b9 Mon Sep 17 00:00:00 2001
From: Peter Zijlstra <a.p.zijlstra@chello.nl>
Date: Tue, 16 Dec 2008 08:45:31 +0100
Subject: [PATCH] --- yaml --- r: 121345 b: refs/heads/master c:
 34f28ecd0f4bdc733c681294d02d9fab5880591b h: refs/heads/master i:   121343:
 57a60d0e9c5a68d82f4bb7ded622cbea1b666aab v: v3

---
 [refs]                    | 2 +-
 trunk/kernel/sched_fair.c | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index 61459c7b107c..8f3677b28142 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 03e89e4574a680af15f59329b061f35d9813aff4
+refs/heads/master: 34f28ecd0f4bdc733c681294d02d9fab5880591b
diff --git a/trunk/kernel/sched_fair.c b/trunk/kernel/sched_fair.c
index 928cd74cff0d..5ad4440f0fc4 100644
--- a/trunk/kernel/sched_fair.c
+++ b/trunk/kernel/sched_fair.c
@@ -492,6 +492,8 @@ static void update_curr(struct cfs_rq *cfs_rq)
 	 * overflow on 32 bits):
 	 */
 	delta_exec = (unsigned long)(now - curr->exec_start);
+	if (!delta_exec)
+		return;
 
 	__update_curr(cfs_rq, curr, delta_exec);
 	curr->exec_start = now;