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authorArjan van de Ven <arjan@linux.intel.com>2008-10-11 12:25:45 -0700
committerArjan van de Ven <arjan@linux.intel.com>2008-10-11 12:25:45 -0700
commit030aebd2e439a2ebcca2b0ce30a02ed84feb043e (patch)
tree2a6e0ce9fbd690dd8d8be1b615dcedeaefffcc23 /kernel/hrtimer.c
parent2075eb8d95612cadde91ef5be82691d97a2ea6c5 (diff)
downloadop-kernel-dev-030aebd2e439a2ebcca2b0ce30a02ed84feb043e.zip
op-kernel-dev-030aebd2e439a2ebcca2b0ce30a02ed84feb043e.tar.gz
rangetimer: fix BUG_ON reported by Ingo
There's a small race/chance that, while hrtimers are enabled globally, they're later not enabled when we're calling the hrtimer_interrupt() function, which then BUG_ON()'s for that. This patch closes that race/gap. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Diffstat (limited to 'kernel/hrtimer.c')
-rw-r--r--kernel/hrtimer.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index eb2cf98..b17657d 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -1395,11 +1395,15 @@ void hrtimer_peek_ahead_timers(void)
unsigned long flags;
struct tick_device *td;
struct clock_event_device *dev;
-
+ struct hrtimer_cpu_base *cpu_base;
if (hrtimer_hres_active())
return;
local_irq_save(flags);
+ cpu_base = &__get_cpu_var(hrtimer_bases);
+ if (!cpu_base->hres_active)
+ goto out;
+
td = &__get_cpu_var(tick_cpu_device);
if (!td)
goto out;
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