[patch 23/26] alarmtimer: Implement remaining callback

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

[-- Attachment #1: alarmtimer--Implement-remaining-callback.patch --]
[-- Type: text/plain, Size: 1658 bytes --]

Preparatory change to utilize the common posix timer mechanisms.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
kernel/time/alarmtimer.c | 31 ++++++++++++++++++++++---------
1 file changed, 22 insertions(+), 9 deletions(-)

--- a/kernel/time/alarmtimer.c
+++ b/kernel/time/alarmtimer.c
@@ -561,6 +561,18 @@ static int alarm_timer_forward(struct k_
}

/**
+ * 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
* @tp: timespec to fill
@@ -881,15 +893,16 @@ static int alarm_timer_nsleep(const cloc
}

const struct k_clock alarm_clock = {
- .clock_getres = alarm_clock_getres,
- .clock_get = alarm_clock_get,
- .timer_create = alarm_timer_create,
- .timer_set = alarm_timer_set,
- .timer_del = alarm_timer_del,
- .timer_get = alarm_timer_get,
- .timer_rearm = alarm_timer_rearm,
- .timer_forward = alarm_timer_forward,
- .nsleep = alarm_timer_nsleep,
+ .clock_getres = alarm_clock_getres,
+ .clock_get = alarm_clock_get,
+ .timer_create = alarm_timer_create,
+ .timer_set = alarm_timer_set,
+ .timer_del = alarm_timer_del,
+ .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 */