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posix-timers: Store k_clock pointer in k_itimer

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Having the k_clock pointer in the k_itimer struct avoids the lookup in
several code pathes and makes the next steps of unification of the hrtimer
and alarmtimer based posix timers simpler.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: John Stultz <john.stultz@linaro.org>
Link: http://lkml.kernel.org/r/20170530211656.641222072@linutronix.de
This commit is contained in:
Thomas Gleixner 2017-05-30 23:15:44 +02:00
parent 80105cd0e6
commit d97bb75ddd
3 changed files with 8 additions and 3 deletions
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7
kernel/time/posix-timers.c
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@ -519,6 +519,7 @@ SYSCALL_DEFINE3(timer_create, const clockid_t, which_clock,
it_id_set = IT_ID_SET;
new_timer->it_id = (timer_t) new_timer_id;
new_timer->it_clock = which_clock;
new_timer->kclock = kc;
new_timer->it_overrun = -1;
if (timer_event_spec) {
@ -679,7 +680,7 @@ SYSCALL_DEFINE2(timer_gettime, timer_t, timer_id,
if (!timr)
return -EINVAL;
kc = clockid_to_kclock(timr->it_clock);
kc = timr->kclock;
if (WARN_ON_ONCE(!kc || !kc->timer_get))
ret = -EINVAL;
else
@ -798,7 +799,7 @@ retry:
if (!timr)
return -EINVAL;
kc = clockid_to_kclock(timr->it_clock);
kc = timr->kclock;
if (WARN_ON_ONCE(!kc || !kc->timer_set))
error = -EINVAL;
else
@ -829,7 +830,7 @@ static int common_timer_del(struct k_itimer *timer)
static inline int timer_delete_hook(struct k_itimer *timer)
{
const struct k_clock *kc = clockid_to_kclock(timer->it_clock);
const struct k_clock *kc = timer->kclock;
if (WARN_ON_ONCE(!kc || !kc->timer_del))
return -EINVAL;