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Commit b3bf6f36 authored by Thomas Gleixner's avatar Thomas Gleixner
Browse files

alarmtimer: Implement arm callback 



Preparatory change to utilize the common posix timer mechanisms.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: John Stultz <john.stultz@linaro.org>
Link: http://lkml.kernel.org/r/20170530211657.747567162@linutronix.de
parent e344c9e7

kernel/time/alarmtimer.c

+22 −0
Original line number Diff line number Diff line
@@ -581,6 +581,27 @@ static int alarm_timer_try_to_cancel(struct k_itimer *timr) 
	return alarm_try_to_cancel(&timr->it.alarm.alarmtimer);

}



/**

 * 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
@@ -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,