From 00362e33f65f1cb5d15e62ea5509520ce2770360 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Fri, 31 Mar 2006 02:31:17 -0800 Subject: [PATCH] [PATCH] hrtimer: create generic sleeper The removal of the data field in the hrtimer structure enforces the embedding of the timer into another data structure. nanosleep now uses a private implementation of the most common used timer callback function (simple task wakeup). In order to avoid the reimplentation of such functionality all over the place a generic hrtimer_sleeper functionality is created. Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/hrtimer.h | 16 ++++++++++++++++ kernel/hrtimer.c | 19 +++++++++++++++++++ 2 files changed, 35 insertions(+) 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 @@ -57,6 +57,19 @@ struct hrtimer { struct hrtimer_base *base; }; +/** + * 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 * @@ -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; -- 2.20.1