[patch 25/26] alarmtimer: Implement arm callback

Thomas Gleixner
2017-05-30T21:42:21Z

[-- Attachment #1: alarmtimer--Implement-arm-callback.patch --]
[-- Type: text/plain, Size: 1520 bytes --]

Preparatory change to utilize the common posix timer mechanisms.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
kernel/time/alarmtimer.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)

Index: b/kernel/time/alarmtimer.c
===================================================================
--- a/kernel/time/alarmtimer.c
+++ b/kernel/time/alarmtimer.c
@@ -582,6 +582,27 @@ static int alarm_timer_try_to_cancel(str
}

/**
+ * 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,