linux-kernel - [PATCH 1/2] nohz: Drop useless call in tick_nohz_start

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Message-Id: <1311274177-23891-1-git-send-email-fweisbec@gmail.com>
Date:	Thu, 21 Jul 2011 20:49:36 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: [PATCH 1/2] nohz: Drop useless call in tick_nohz_start_idle()

The call to update_ts_time_stats() there is useless. All
we need is to save the idle entry_time.

Signed-off-by: Frederic Weisbecker <fweisbec@...il.com>
Cc: Ingo Molnar <mingo@...e.hu>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
---
 kernel/time/tick-sched.c |    3 ---
 1 files changed, 0 insertions(+), 3 deletions(-)

diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index d5097c4..58e1a96 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -185,9 +185,6 @@ static ktime_t tick_nohz_start_idle(int cpu, struct tick_sched *ts)
 	ktime_t now;
 
 	now = ktime_get();
-
-	update_ts_time_stats(cpu, ts, now, NULL);
-
 	ts->idle_entrytime = now;
 	ts->idle_active = 1;
 	sched_clock_idle_sleep_event();
-- 
1.7.5.4

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