Commit-ID: b3bf6f369d50ece9dec6338741648005d95c19e4 Gitweb: http://git.kernel.org/tip/b3bf6f369d50ece9dec6338741648005d95c19e4 Author: Thomas Gleixner <[email protected]> AuthorDate: Tue, 30 May 2017 23:15:58 +0200 Committer: Thomas Gleixner <[email protected]> CommitDate: Sun, 4 Jun 2017 15:40:31 +0200
alarmtimer: Implement arm callback Preparatory change to utilize the common posix timer mechanisms. Signed-off-by: Thomas Gleixner <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: John Stultz <[email protected]> Link: http://lkml.kernel.org/r/[email protected] --- kernel/time/alarmtimer.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c index 374bd85..c618a44 100644 --- a/kernel/time/alarmtimer.c +++ b/kernel/time/alarmtimer.c @@ -582,6 +582,27 @@ static int alarm_timer_try_to_cancel(struct k_itimer *timr) } /** + * alarm_timer_arm - Posix timer callback to arm a timer + * @timr: Pointer to the posixtimer data struct + * @expires: The new expiry time + * @absolute: Expiry value is absolute time + * @sigev_none: Posix timer does not deliver signals + */ +static void alarm_timer_arm(struct k_itimer *timr, ktime_t expires, + bool absolute, bool sigev_none) +{ + struct alarm *alarm = &timr->it.alarm.alarmtimer; + struct alarm_base *base = &alarm_bases[alarm->type]; + + if (!absolute) + expires = ktime_add_safe(expires, base->gettime()); + if (sigev_none) + alarm->node.expires = expires; + else + alarm_start(&timr->it.alarm.alarmtimer, expires); +} + +/** * alarm_clock_getres - posix getres interface * @which_clock: clockid * @tp: timespec to fill @@ -908,6 +929,7 @@ const struct k_clock alarm_clock = { .timer_set = alarm_timer_set, .timer_del = alarm_timer_del, .timer_get = alarm_timer_get, + .timer_arm = alarm_timer_arm, .timer_rearm = alarm_timer_rearm, .timer_forward = alarm_timer_forward, .timer_remaining = alarm_timer_remaining,
