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sched: Fold updating of the last_update_time_info into update_ts_time_stats() 

This patch folds the updating of the last_update_time into the
update_ts_time_stats() function, and updates the callers.

This allows for further cleanups that are done in the next
patch.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Rik van Riel <riel@redhat.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: davej@redhat.com
LKML-Reference: <20100509082403.60072967@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Arjan van de Ven 2010-05-09 08:24:03 -07:00 committed by Ingo Molnar
parent 8c7b09f43f
commit 8d63bf949e
1 changed files with 11 additions and 11 deletions
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22
kernel/time/tick-sched.c
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@ -153,7 +153,8 @@ static void tick_nohz_update_jiffies(ktime_t now)
/*
* Updates the per cpu time idle statistics counters
*/
static void update_ts_time_stats(struct tick_sched *ts, ktime_t now)
static void
update_ts_time_stats(struct tick_sched *ts, ktime_t now, u64 *last_update_time)
{
ktime_t delta;
@ -163,13 +164,19 @@ static void update_ts_time_stats(struct tick_sched *ts, ktime_t now)
ts->idle_sleeptime = ktime_add(ts->idle_sleeptime, delta);
ts->idle_entrytime = now;
}
if (ts->idle_active && last_update_time)
*last_update_time = ktime_to_us(ts->idle_lastupdate);
else
*last_update_time = ktime_to_us(now);
}
static void tick_nohz_stop_idle(int cpu, ktime_t now)
{
struct tick_sched *ts = &per_cpu(tick_cpu_sched, cpu);
update_ts_time_stats(ts, now);
update_ts_time_stats(ts, now, NULL);
ts->idle_active = 0;
sched_clock_idle_wakeup_event(0);
@ -181,7 +188,7 @@ static ktime_t tick_nohz_start_idle(struct tick_sched *ts)
now = ktime_get();
update_ts_time_stats(ts, now);
update_ts_time_stats(ts, now, NULL);
ts->idle_entrytime = now;
ts->idle_active = 1;
@ -206,18 +213,11 @@ static ktime_t tick_nohz_start_idle(struct tick_sched *ts)
u64 get_cpu_idle_time_us(int cpu, u64 *last_update_time)
{
struct tick_sched *ts = &per_cpu(tick_cpu_sched, cpu);
ktime_t now;
if (!tick_nohz_enabled)
return -1;
now = ktime_get();
update_ts_time_stats(ts, now);
if (ts->idle_active)
*last_update_time = ktime_to_us(ts->idle_lastupdate);
else
*last_update_time = ktime_to_us(now);
update_ts_time_stats(ts, ktime_get(), last_update_time);
return ktime_to_us(ts->idle_sleeptime);
}