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sched: Eliminate the ts->idle_lastupdate field

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Now that the only user of ts->idle_lastupdate is
update_ts_time_stats(), the entire field can be eliminated.

In update_ts_time_stats(), idle_lastupdate is first set to
"now", and a few lines later, the only user is an if() statement
that assigns a variable either to "now" or to
ts->idle_lastupdate, which has the value of "now" at that point.

Signed-off-by: Arjan van de Ven <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Reviewed-by: Rik van Riel <[email protected]>
Acked-by: Peter Zijlstra <[email protected]>
Cc: [email protected]
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Arjan van de Ven authored and Ingo Molnar committed 2010-05-09 19:35:26 +02:00
1 parent 8d63bf949e
commit e0e37c200f
2 files changed
+1 -5
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include/linux/tick.h
-1
View File
@@ -60,7 +60,6 @@ struct tick_sched {
ktime_t idle_waketime;
ktime_t idle_exittime;
ktime_t idle_sleeptime;
ktime_t idle_lastupdate;
ktime_t sleep_length;
unsigned long last_jiffies;
unsigned long next_jiffies;
kernel/time/tick-sched.c
+1 -4
View File
@@ -158,16 +158,13 @@ update_ts_time_stats(struct tick_sched *ts, ktime_t now, u64 *last_update_time)
{
ktime_t delta;
ts->idle_lastupdate = now;
if (ts->idle_active) {
delta = ktime_sub(now, ts->idle_entrytime);
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
if (last_update_time)
*last_update_time = ktime_to_us(now);
}