From 7a62eabc4d60980eb39fff659f168d903b55c6d7 Mon Sep 17 00:00:00 2001
From: Ingo Molnar <mingo@elte.hu>
Date: Mon, 15 Oct 2007 17:00:06 +0200
Subject: [PATCH] sched: debug: update exec_clock only when SCHED_DEBUG

micro-optimization: update cfs_rq->exec_clock only if
CONFIG_SCHED_DEBUG=y.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Mike Galbraith <efault@gmx.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
---
 kernel/sched_fair.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index 895fef74d99a..ce79eb0f0660 100644
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -301,7 +301,7 @@ __update_curr(struct cfs_rq *cfs_rq, struct sched_entity *curr,
 	schedstat_set(curr->exec_max, max((u64)delta_exec, curr->exec_max));
 
 	curr->sum_exec_runtime += delta_exec;
-	cfs_rq->exec_clock += delta_exec;
+	schedstat_add(cfs_rq, exec_clock, delta_exec);
 	delta_exec_weighted = delta_exec;
 	if (unlikely(curr->load.weight != NICE_0_LOAD)) {
 		delta_exec_weighted = calc_delta_fair(delta_exec_weighted,
-- 
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