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authorThomas Gleixner <tglx@linutronix.de>2017-05-30 23:15:56 +0200
committerThomas Gleixner <tglx@linutronix.de>2017-06-04 15:40:31 +0200
commitd653d8457c76da11f047af1f66256ac9b8421b69 (patch)
tree2eeb831135096f08e0766916d04445d26c68df79 /kernel/time/alarmtimer.c
parente7561f1633ac735df48c55ad09a2530e9ab9fab1 (diff)
alarmtimer: Implement remaining 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/20170530211657.592676753@linutronix.de
Diffstat (limited to 'kernel/time/alarmtimer.c')
-rw-r--r--kernel/time/alarmtimer.c31
1 files changed, 22 insertions, 9 deletions
diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c
index 6082cf1af876..02ddc40f19fe 100644
--- a/kernel/time/alarmtimer.c
+++ b/kernel/time/alarmtimer.c
@@ -561,6 +561,18 @@ static int alarm_timer_forward(struct k_itimer *timr, ktime_t 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
* @tp: timespec to fill
@@ -881,15 +893,16 @@ out:
}
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 */