[PATCH] arm: fix oops in sched_clock_poll
From: Russell King - ARM Linux <hidden>
Date: 2011-07-08 16:44:13
On Thu, Jan 20, 2011 at 12:47:21AM +0800, tom.leiming at gmail.com wrote:
quoted hunk ↗ jump to hunk
diff --git a/arch/arm/kernel/sched_clock.c b/arch/arm/kernel/sched_clock.c index 9a46370..782dd08 100644 --- a/arch/arm/kernel/sched_clock.c +++ b/arch/arm/kernel/sched_clock.c@@ -21,7 +21,9 @@ static void (*sched_clock_update_fn)(void); static void sched_clock_poll(unsigned long wrap_ticks) { mod_timer(&sched_clock_timer, round_jiffies(jiffies + wrap_ticks)); - sched_clock_update_fn(); + + if (sched_clock_update_fn) + sched_clock_update_fn(); }
This is the wrong solution. At this point there must be an update function. sched_clock must already be up and running by the time sched_clock_postinit() is called.