[tip:timers/core] alarmtimer: Implement timer_rearm() callback

tip-bot for Thomas Gleixner
2017-06-05T08:27:00Z

Commit-ID: b3db80f77a95a45dbb2136f7b2a364dc797ea914
Gitweb: http://git.kernel.org/tip/b3db80f77a95a45dbb2136f7b2a364dc797ea914
Author: Thomas Gleixner <tglx@linutronix.de>
AuthorDate: Tue, 30 May 2017 23:15:54 +0200
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitDate: Sun, 4 Jun 2017 15:40:30 +0200

alarmtimer: Implement timer_rearm() 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/20170530211657.434598989@linutronix.de

---
kernel/time/alarmtimer.c | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c
index 5b8cf4b..be85e3c 100644
--- a/kernel/time/alarmtimer.c
+++ b/kernel/time/alarmtimer.c
@@ -537,6 +537,18 @@ static enum alarmtimer_restart alarm_handle_timer(struct alarm *alarm,
}

/**
+ * alarm_timer_rearm - Posix timer callback for rearming timer
+ * @timr: Pointer to the posixtimer data struct
+ */
+static void alarm_timer_rearm(struct k_itimer *timr)
+{
+ struct alarm *alarm = &timr->it.alarm.alarmtimer;
+
+ timr->it_overrun += alarm_forward_now(alarm, timr->it_interval);
+ alarm_start(alarm, alarm->node.expires);
+}
+
+/**
* alarm_clock_getres - posix getres interface
* @which_clock: clockid
* @tp: timespec to fill
@@ -594,7 +606,7 @@ static int alarm_timer_create(struct k_itimer *new_timer)

/**
* alarm_timer_get - posix timer_get interface
- * @new_timer: k_itimer pointer
+ * @timr: k_itimer pointer
* @cur_setting: itimerspec data to fill
*
* Copies out the current itimerspec data
@@ -863,6 +875,7 @@ const struct k_clock alarm_clock = {
.timer_set = alarm_timer_set,
.timer_del = alarm_timer_del,
.timer_get = alarm_timer_get,
+ .timer_rearm = alarm_timer_rearm,
.nsleep = alarm_timer_nsleep,
};
#endif /* CONFIG_POSIX_TIMERS */