1 files changed, 19 insertions, 0 deletions

diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index 0237a556eb1f..877cdf9678bf 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -656,6 +656,25 @@ void hrtimer_run_queues(void)
  * Sleep related functions:
  */
 
+static int hrtimer_wakeup(struct hrtimer *timer)
+{
+        struct hrtimer_sleeper *t =
+                container_of(timer, struct hrtimer_sleeper, timer);
+        struct task_struct *task = t->task;
+
+        t->task = NULL;
+        if (task)
+                wake_up_process(task);
+
+        return HRTIMER_NORESTART;
+}
+
+void hrtimer_init_sleeper(struct hrtimer_sleeper *sl, task_t *task)
+{
+        sl->timer.function = hrtimer_wakeup;
+        sl->task = task;
+}
+
 struct sleep_hrtimer {
         struct hrtimer timer;
         struct task_struct *task;