hrtimer_start*() family never fails to enqueue a hrtimer to a clock-base. The
only special case is when the hrtimer was in past. If it is getting enqueued to
local CPUs's clock-base, we raise a softirq and exit, else we handle that on
next interrupt on remote CPU.
At several places in kernel we check if hrtimer is enqueued properly with
hrtimer_active(). This isn't required and can be dropped.
Before fixing that, lets make sure hrtimer is always enqueued properly by adding
WARN_ON_ONCE(!hrtimer_active(timer));
towards the end of __hrtimer_start_range_ns().
Suggested-by: Frederic Weisbecker <fweis...@gmail.com>
Signed-off-by: Viresh Kumar <viresh.ku...@linaro.org>
---
kernel/hrtimer.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index 3ab2899..cf40209 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -1037,6 +1037,8 @@ int __hrtimer_start_range_ns(struct hrtimer *timer,
ktime_t tim,
unlock_hrtimer_base(timer, &flags);
+ /* Make sure timer is enqueued */
+ WARN_ON_ONCE(!hrtimer_active(timer));
return ret;
}
EXPORT_SYMBOL_GPL(__hrtimer_start_range_ns);
--
2.0.0.rc2
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
