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Subject[PATCH 02/16] hrtimer: reorder code in __remove_hrtimer()
Date
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:
--
1.7.12.rc2.18.g61b472e


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