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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@suse.cz>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Link: http://lkml.kernel.org/r/1322755222-6951-1-git-send-email-mhocko@suse.cz
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Michal Hocko 2011-12-01 17:00:22 +01:00 committed by Thomas Gleixner
parent 77b0d60c5a
commit 430ee88195
1 changed files with 1 additions and 5 deletions
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6
kernel/time/tick-sched.c
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@ -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;