diff options
| author | Todd Poynor <toddpoynor@google.com> | 2013-05-07 20:43:29 -0700 |
|---|---|---|
| committer | Arve Hjønnevåg <arve@android.com> | 2013-07-01 14:16:28 -0700 |
| commit | 7b71ddcebb443992703f409994bebb3a3121bfc8 (patch) | |
| tree | 4155702b2b32722d6ab06ca5acf666a2b7f2aead | |
| parent | 9231422b0b0c91d88361752efd34b67ff5e2800c (diff) | |
alarmtimer: add alarm_expires_remaining
Similar to hrtimer_expires_remaining, return the amount of time
remaining until alarm expiry.
Change-Id: I8c57512d619ac66bcdaf2d9ccdf0d7f74af2ff66
Signed-off-by: Todd Poynor <toddpoynor@google.com>
| -rw-r--r-- | include/linux/alarmtimer.h | 1 | ||||
| -rw-r--r-- | kernel/time/alarmtimer.c | 6 |
2 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/alarmtimer.h b/include/linux/alarmtimer.h index f47dadc6dab..a899402a5a0 100644 --- a/include/linux/alarmtimer.h +++ b/include/linux/alarmtimer.h @@ -51,6 +51,7 @@ 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); +ktime_t alarm_expires_remaining(const struct alarm *alarm); /* 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 adfcd78e79f..3e5cba27447 100644 --- a/kernel/time/alarmtimer.c +++ b/kernel/time/alarmtimer.c @@ -199,6 +199,12 @@ static enum hrtimer_restart alarmtimer_fired(struct hrtimer *timer) } +ktime_t alarm_expires_remaining(const struct alarm *alarm) +{ + struct alarm_base *base = &alarm_bases[alarm->type]; + return ktime_sub(alarm->node.expires, base->gettime()); +} + #ifdef CONFIG_RTC_CLASS /** * alarmtimer_suspend - Suspend time callback |