[tip:timers/core] nohz: Remove update_ts_time_stat from tick_nohz_start_idle

[tip-bot for Michal Hocko]

Commit-ID:  430ee8819553f66fe00e36f676a45886d76e7e8b
Gitweb:     http://git.kernel.org/tip/430ee8819553f66fe00e36f676a45886d76e7e8b
Author:     Michal Hocko <mhocko@xxxxxxx>
AuthorDate: Thu, 1 Dec 2011 17:00:22 +0100
Committer:  Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Wed, 15 Feb 2012 15:23:09 +0100

nohz: Remove update_ts_time_stat from tick_nohz_start_idle

There is no reason to call update_ts_time_stat from tick_nohz_start_idle
anymore (after e0e37c20 sched: Eliminate the ts->idle_lastupdate field)
when we updated idle_lastupdate unconditionally.

We haven't set idle_active yet and do not provide last_update_time so
the whole call end up being just 2 wasted branches.

Signed-off-by: Michal Hocko <mhocko@xxxxxxx>
Cc: Arjan van de Ven <arjan@xxxxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/1322755222-6951-1-git-send-email-mhocko@xxxxxxx
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
 kernel/time/tick-sched.c |    6 +-----
 1 files changed, 1 insertions(+), 5 deletions(-)

diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index 7656642..8cfffd9 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -182,11 +182,7 @@ static void tick_nohz_stop_idle(int cpu, ktime_t now)
 
 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);
+	ktime_t now = ktime_get();
 
 	ts->idle_entrytime = now;
 	ts->idle_active = 1;
--
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