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[ARM] 2857/2: Dynamic tick - fix OOPS if configured and not provided 

Patch from Ben Dooks

timer_dyn_reprogram() fails with an OOPS if the
configuration for CONFIG_NO_IDLE_HZ is enabled, and
the system has no support for it.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Ben Dooks 2005-08-31 09:42:14 +01:00 committed by Russell King
parent 083bc6b3c9
commit 3618886f64
1 changed files with 6 additions and 4 deletions
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10
arch/arm/kernel/time.c
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@ -433,10 +433,12 @@ void timer_dyn_reprogram(void)
{
struct dyn_tick_timer *dyn_tick = system_timer->dyn_tick;
write_seqlock(&xtime_lock);
if (dyn_tick->state & DYN_TICK_ENABLED)
dyn_tick->reprogram(next_timer_interrupt() - jiffies);
write_sequnlock(&xtime_lock);
if (dyn_tick) {
write_seqlock(&xtime_lock);
if (dyn_tick->state & DYN_TICK_ENABLED)
dyn_tick->reprogram(next_timer_interrupt() - jiffies);
write_sequnlock(&xtime_lock);
}
}
static ssize_t timer_show_dyn_tick(struct sys_device *dev, char *buf)