diff options
| -rw-r--r-- | include/linux/hrtimer.h | 16 | ||||
| -rw-r--r-- | kernel/hrtimer.c | 19 |
2 files changed, 35 insertions, 0 deletions
diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h index 93830158348..b2093928761 100644 --- a/include/linux/hrtimer.h +++ b/include/linux/hrtimer.h @@ -58,6 +58,19 @@ struct hrtimer { }; /** + * struct hrtimer_sleeper - simple sleeper structure + * + * @timer: embedded timer structure + * @task: task to wake up + * + * task is set to NULL, when the timer expires. + */ +struct hrtimer_sleeper { + struct hrtimer timer; + struct task_struct *task; +}; + +/** * struct hrtimer_base - the timer base for a specific clock * * @index: clock type index for per_cpu support when moving a timer @@ -127,6 +140,9 @@ extern long hrtimer_nanosleep(struct timespec *rqtp, const enum hrtimer_mode mode, const clockid_t clockid); +extern void hrtimer_init_sleeper(struct hrtimer_sleeper *sl, + struct task_struct *tsk); + /* Soft interrupt function to run the hrtimer queues: */ extern void hrtimer_run_queues(void); diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c index 0237a556eb1..877cdf9678b 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; |