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Commit 8bdec955 authored by Thomas Gleixner's avatar Thomas Gleixner Committed by Ingo Molnar
Browse files

hrtimer: splitout peek ahead functionality 



Impact: cleanup

Provide a peek ahead function that assumes irqs disabled, allows for micro
optimizations.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent fe0bdec6

kernel/hrtimer.c

+17 −7
Original line number Diff line number Diff line
@@ -1243,6 +1243,22 @@ void hrtimer_interrupt(struct clock_event_device *dev) 
	}

}



/*

 * local version of hrtimer_peek_ahead_timers() called with interrupts

 * disabled.

 */

static void __hrtimer_peek_ahead_timers(void)

{

	struct tick_device *td;



	if (!hrtimer_hres_active())

		return;



	td = &__get_cpu_var(tick_cpu_device);

	if (td && td->evtdev)

		hrtimer_interrupt(td->evtdev);

}



/**

 * hrtimer_peek_ahead_timers -- run soft-expired timers now

 *
@@ -1254,16 +1270,10 @@ void hrtimer_interrupt(struct clock_event_device *dev) 
 */

void hrtimer_peek_ahead_timers(void)

{

	struct tick_device *td;

	unsigned long flags;



	if (!hrtimer_hres_active())

		return;



	local_irq_save(flags);

	td = &__get_cpu_var(tick_cpu_device);

	if (td && td->evtdev)

		hrtimer_interrupt(td->evtdev);

	__hrtimer_peek_ahead_timers();

	local_irq_restore(flags);

}