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authorJohn Stultz <john.stultz@linaro.org>2011-08-10 23:41:36 +0400
committerJohn Stultz <john.stultz@linaro.org>2011-08-11 01:55:29 +0400
commit9082c465a5403f4a98734193e078552991a2e283 (patch)
tree387e564f326488abe9ee84b0c723294ea573de1e /include/linux/alarmtimer.h
parenta28cde81ab13cc251748a4c4ef06883dd09a10ea (diff)
downloadlinux-9082c465a5403f4a98734193e078552991a2e283.tar.xz
alarmtimers: Add try_to_cancel functionality
There's a number of edge cases when cancelling a alarm, so to be sure we accurately do so, introduce try_to_cancel, which returns proper failure errors if it cannot. Also modify cancel to spin until the alarm is properly disabled. CC: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: John Stultz <john.stultz@linaro.org>
Diffstat (limited to 'include/linux/alarmtimer.h')
-rw-r--r--include/linux/alarmtimer.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/alarmtimer.h b/include/linux/alarmtimer.h
index 304124a6c982..975009e1cbe6 100644
--- a/include/linux/alarmtimer.h
+++ b/include/linux/alarmtimer.h
@@ -44,7 +44,8 @@ struct alarm {
void alarm_init(struct alarm *alarm, enum alarmtimer_type type,
enum alarmtimer_restart (*function)(struct alarm *, ktime_t));
void alarm_start(struct alarm *alarm, ktime_t start);
-void alarm_cancel(struct alarm *alarm);
+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);