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authorBen Dooks <ben-linux@fluff.org>2005-08-31 09:42:14 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2005-08-31 09:42:14 +0100
commit3618886f645c2ede45742d3e3d22a96b2ee2f527 (patch)
tree7fdfb43dd3a4db112343caccce091c12435210da /arch
parent083bc6b3c9b52b5998cc49d4aa2f8f15c2e84e6b (diff)
[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>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/kernel/time.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/arch/arm/kernel/time.c b/arch/arm/kernel/time.c
index 1b7fcd50c3e2..8880482dcbff 100644
--- a/arch/arm/kernel/time.c
+++ b/arch/arm/kernel/time.c
@@ -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)