We are taking cpu_base->lock for every clock-base in hrtimer_run_queues() and there is nothing in there which prevents us to take this lock only once. Modify code to take lock only once for a cpu_base.
Signed-off-by: Viresh Kumar viresh.kumar@linaro.org --- kernel/hrtimer.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c index 2d9a7e2..c712960 100644 --- a/kernel/hrtimer.c +++ b/kernel/hrtimer.c @@ -1466,8 +1466,8 @@ void hrtimer_run_queues(void) if (cpu_base->active_bases) hrtimer_get_softirq_time(cpu_base);
+ raw_spin_lock(&cpu_base->lock); for_each_active_base(index, base, cpu_base, active_bases) { - raw_spin_lock(&cpu_base->lock); while ((node = timerqueue_getnext(&base->active))) { struct hrtimer *timer;
@@ -1478,8 +1478,8 @@ void hrtimer_run_queues(void)
__run_hrtimer(timer, &base->softirq_time); } - raw_spin_unlock(&cpu_base->lock); } + raw_spin_unlock(&cpu_base->lock); }
/*