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[PATCH] ARM: Add VST idle loop call

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This call allows the dynamic tick support to reprogram the timer
immediately before the CPU idles.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King
2005-06-27 14:04:05 +01:00
committed by Russell King
parent 99bcc05908
commit 2ea83398b7
3 changed files with 13 additions and 4 deletions
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10
arch/arm/kernel/time.c
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@@ -424,15 +424,19 @@ static int timer_dyn_tick_disable(void)
return ret;
}
/*
* Reprogram the system timer for at least the calculated time interval.
* This function should be called from the idle thread with IRQs disabled,
* immediately before sleeping.
*/
void timer_dyn_reprogram(void)
{
struct dyn_tick_timer *dyn_tick = system_timer->dyn_tick;
unsigned long flags;
write_seqlock_irqsave(&xtime_lock, flags);
write_seqlock(&xtime_lock);
if (dyn_tick->state & DYN_TICK_ENABLED)
dyn_tick->reprogram(next_timer_interrupt() - jiffies);
write_sequnlock_irqrestore(&xtime_lock, flags);
write_sequnlock(&xtime_lock);
}
static ssize_t timer_show_dyn_tick(struct sys_device *dev, char *buf)