Timers are removed from the red-black trees from __remove_hrtimer() and after removing timer from the tree, it calls hrtimer_force_reprogram() which might use value of cpu_base->active_bases. If the timer being removed is the last one on that clock base, then cpu_base->active_bases wouldn't give the right value, as there are no timers queued on the base but active base still marks it as active.
So, clear entry from active_bases as soon as timer is removed.
Signed-off-by: Viresh Kumar viresh.kumar@linaro.org --- kernel/hrtimer.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c index 2d5bb9d..379d21a 100644 --- a/kernel/hrtimer.c +++ b/kernel/hrtimer.c @@ -895,6 +895,9 @@ static void __remove_hrtimer(struct hrtimer *timer, next_timer = timerqueue_getnext(&base->active); timerqueue_del(&base->active, &timer->node);
+ if (!timerqueue_getnext(&base->active)) + base->cpu_base->active_bases &= ~(1 << base->index); + #ifdef CONFIG_HIGH_RES_TIMERS /* Reprogram the clock event device. if enabled */ if (reprogram && base->cpu_base->hres_active && @@ -907,8 +910,6 @@ static void __remove_hrtimer(struct hrtimer *timer, } #endif timer->state = newstate; - if (!timerqueue_getnext(&base->active)) - base->cpu_base->active_bases &= ~(1 << base->index); }
/*