This patch reorders code within __remove_hrtimer() routine to achieve this: - no need to check if timer is the next timer to expire when high resolution mode isn't configured in kernel. - no need of local variable 'next_timer' - Validate 'reprogram' and hrtimer_hres_active() first as without these we don't need to check if timer is the next timer to fire.
Signed-off-by: Viresh Kumar viresh.kumar@linaro.org --- kernel/hrtimer.c | 23 ++++++++++------------- 1 file changed, 10 insertions(+), 13 deletions(-)
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c index a710638..6476152 100644 --- a/kernel/hrtimer.c +++ b/kernel/hrtimer.c @@ -887,25 +887,22 @@ static void __remove_hrtimer(struct hrtimer *timer, struct hrtimer_clock_base *base, unsigned long newstate, int reprogram) { - struct timerqueue_node *next_timer; if (!(timer->state & HRTIMER_STATE_ENQUEUED)) goto out;
- next_timer = timerqueue_getnext(&base->active); timerqueue_del(&base->active, &timer->node); - if (&timer->node == next_timer) { + #ifdef CONFIG_HIGH_RES_TIMERS - /* Reprogram the clock event device. if enabled */ - if (reprogram && hrtimer_hres_active()) { - ktime_t expires; - - expires = ktime_sub(hrtimer_get_expires(timer), - base->offset); - if (base->cpu_base->expires_next.tv64 == expires.tv64) - hrtimer_force_reprogram(base->cpu_base, 1); - } -#endif + /* Reprogram the clock event device. if enabled */ + if (reprogram && hrtimer_hres_active() && + &timer->node == timerqueue_getnext(&base->active)) { + ktime_t expires; + + expires = ktime_sub(hrtimer_get_expires(timer), base->offset); + if (base->cpu_base->expires_next.tv64 == expires.tv64) + hrtimer_force_reprogram(base->cpu_base, 1); } +#endif if (!timerqueue_getnext(&base->active)) base->cpu_base->active_bases &= ~(1 << base->index); out: