[PATCH resend] nohz: Remove update_ts_time_stat fromtick_nohz_start_idle
From: Michal Hocko
Date: Sun Dec 18 2011 - 11:27:40 EST
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>
Reviewed-by: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Reviewed-by: Kamalesh Babulal <kamalesh@xxxxxxxxxxxxxxxxxx>
CC: Arjan van de Ven <arjan@xxxxxxxxxxxxxxx>
CC: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
kernel/time/tick-sched.c | 2 --
1 files changed, 0 insertions(+), 2 deletions(-)
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index 4042064..be3cab0 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -186,8 +186,6 @@ static ktime_t tick_nohz_start_idle(int cpu, struct tick_sched *ts)
now = ktime_get();
- update_ts_time_stats(cpu, ts, now, NULL);
-
ts->idle_entrytime = now;
ts->idle_active = 1;
sched_clock_idle_sleep_event();
--
1.7.7.3
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