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Commit d653d845 authored by Thomas Gleixner's avatar Thomas Gleixner
Browse files

alarmtimer: Implement remaining 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/20170530211657.592676753@linutronix.de
parent e7561f16

kernel/time/alarmtimer.c

+22 −9
Original line number Diff line number Diff line
@@ -560,6 +560,18 @@ static int alarm_timer_forward(struct k_itimer *timr, ktime_t now) 
	return (int) alarm_forward(alarm, timr->it_interval, now);

}



/**

 * alarm_timer_remaining - Posix timer callback to retrieve remaining time

 * @timr:	Pointer to the posixtimer data struct

 * @now:	Current time to calculate against

 */

static ktime_t alarm_timer_remaining(struct k_itimer *timr, ktime_t now)

{

	struct alarm *alarm = &timr->it.alarm.alarmtimer;



	return ktime_sub(now, alarm->node.expires);

}



/**

 * alarm_clock_getres - posix getres interface

 * @which_clock: clockid
@@ -889,6 +901,7 @@ const struct k_clock alarm_clock = { 
	.timer_get		= alarm_timer_get,

	.timer_rearm		= alarm_timer_rearm,

	.timer_forward		= alarm_timer_forward,

	.timer_remaining	= alarm_timer_remaining,

	.nsleep			= alarm_timer_nsleep,

};

#endif /* CONFIG_POSIX_TIMERS */