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hrtimer: optimize the softirq time optimization

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The previous optimization did not take the case into account where a
clock provides its own softirq_get_time() function.

Check for the availablitiy of the clock get time function first and
then check if we need to retrieve the time for both clocks via
hrtimer_softirq_gettime() to avoid a double evaluation of time in that
case as well.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner 2008-04-19 21:31:26 +02:00
parent 833883d9ac
commit 259aae864c
1 changed files with 3 additions and 4 deletions
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7
kernel/hrtimer.c
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@ -1254,14 +1254,13 @@ void hrtimer_run_queues(void)
if (!base->first)
continue;
if (gettime) {
if (base->get_softirq_time)
base->softirq_time = base->get_softirq_time();
else if (gettime) {
hrtimer_get_softirq_time(cpu_base);
gettime = 0;
}
if (base->get_softirq_time)
base->softirq_time = base->get_softirq_time();
spin_lock(&cpu_base->lock);
while ((node = base->first)) {