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authorThomas Gleixner <tglx@linutronix.de>2017-05-30 23:15:58 +0200
committerThomas Gleixner <tglx@linutronix.de>2017-06-04 15:40:31 +0200
commitb3bf6f369d50ece9dec6338741648005d95c19e4 (patch)
treefa6545dc3e43755f73417d690712b3d5164136b9 /kernel/time
parente344c9e76bc6af997926171bfd90d25bbae0a2c5 (diff)
alarmtimer: Implement arm callback
Preparatory change to utilize the common posix timer mechanisms. 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/20170530211657.747567162@linutronix.de
Diffstat (limited to 'kernel/time')
-rw-r--r--kernel/time/alarmtimer.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c
index 374bd855a488..c618a44bb054 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,