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Commit 259aae86 authored by Thomas Gleixner's avatar Thomas Gleixner
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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: default avatarThomas Gleixner <tglx@linutronix.de>
parent 833883d9

kernel/hrtimer.c

+3 −4
Original line number Original line Diff line number Diff line
@@ -1254,14 +1254,13 @@ void hrtimer_run_queues(void) 
		if (!base->first)

		if (!base->first)

			continue;

			continue;





		if (gettime) {

		if (base->get_softirq_time)

			base->softirq_time = base->get_softirq_time();

		else if (gettime) {

			hrtimer_get_softirq_time(cpu_base);

			hrtimer_get_softirq_time(cpu_base);

			gettime = 0;

			gettime = 0;

		}

		}





		if (base->get_softirq_time)

			base->softirq_time = base->get_softirq_time();



		spin_lock(&cpu_base->lock);

		spin_lock(&cpu_base->lock);





		while ((node = base->first)) {

		while ((node = base->first)) {