alarmtimer: add alarm_forward_now

Similar to hrtimer_forward_now, move the expires time forward to an
interval from the current time of the associated clock.

Change-Id: I73fed223321167507b6eddcb7a57d235ffcfc1be
Signed-off-by: Todd Poynor <toddpoynor@google.com>

diff --git a/include/linux/alarmtimer.h b/include/linux/alarmtimer.h
index 65e04ceec27d1432609729a99ab05a0c70eef765..8e696a105a4de263357ca44c84254e3fe10fdd74 100644 (file)
--- a/include/linux/alarmtimer.h
+++ b/include/linux/alarmtimer.h
@@ -49,6 +49,7 @@ int alarm_try_to_cancel(struct alarm *alarm);
 int alarm_cancel(struct alarm *alarm);
 
 u64 alarm_forward(struct alarm *alarm, ktime_t now, ktime_t interval);
+u64 alarm_forward_now(struct alarm *alarm, ktime_t interval);
 
 /* Provide way to access the rtc device being used by alarmtimers */
 struct rtc_device *alarmtimer_get_rtcdev(void);

diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c
index 059e78b12676d50969fe2f23583c2379b34d6fa0..2f125e74d33ddba3fee22ba7c1aa2883aed25227 100644 (file)
--- a/kernel/time/alarmtimer.c
+++ b/kernel/time/alarmtimer.c
@@ -406,6 +406,12 @@ u64 alarm_forward(struct alarm *alarm, ktime_t now, ktime_t interval)
        return overrun;
 }
 
+u64 alarm_forward_now(struct alarm *alarm, ktime_t interval)
+{
+       struct alarm_base *base = &alarm_bases[alarm->type];
+
+       return alarm_forward(alarm, base->gettime(), interval);
+}