Commit 259aae86 authored Apr 19, 2008 by Thomas Gleixner

hrtimer: optimize the softirq time optimization



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>

parent 833883d9

kernel/hrtimer.c

+3 −4

Original line number	Diff line number	Diff line
		@@ -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)) {

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