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hrtimer: splitout peek ahead functionality

Browse source 
Impact: cleanup

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

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Thomas Gleixner 2009-01-05 11:28:19 +01:00 committed by Ingo Molnar
parent fe0bdec68b
commit 8bdec955b0
1 changed files with 17 additions and 7 deletions
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24
kernel/hrtimer.c
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@ -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);
}