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| author | Nam Cao <namcao@linutronix.de> | 2024-10-31 16:14:21 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2024-11-07 02:47:05 +0100 |
| commit | 444cb7db4c9f9b5d96be17c38b3e989df7bfabd5 (patch) | |
| tree | 3cc8406fc58cd8c84696bfdf2df4e56075790638 /kernel/time | |
| parent | 908a1d775422ba2e27a5e33d0c130b522419e121 (diff) | |
| download | linux-444cb7db4c9f9b5d96be17c38b3e989df7bfabd5.tar.gz linux-444cb7db4c9f9b5d96be17c38b3e989df7bfabd5.tar.bz2 linux-444cb7db4c9f9b5d96be17c38b3e989df7bfabd5.zip | |
hrtimers: Introduce hrtimer_setup_on_stack()
To initialize hrtimer on stack, hrtimer_init_on_stack() needs to be called
and also hrtimer::function must be set. This is error-prone and awkward to
use.
Introduce hrtimer_setup_on_stack() which does both of these things, so that
users of hrtimer can be simplified.
The new setup function also has a sanity check for the provided function
pointer. If NULL, a warning is emitted and a dummy callback installed.
hrtimer_init_on_stack() will be removed as soon as all of its users have
been converted to the new function.
Signed-off-by: Nam Cao <namcao@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/4b05e2ab3a82c517adf67fabc0f0cd8fe118b97c.1730386209.git.namcao@linutronix.de
Diffstat (limited to 'kernel/time')
| -rw-r--r-- | kernel/time/hrtimer.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c index a5ef67edcda9..daee4e27f839 100644 --- a/kernel/time/hrtimer.c +++ b/kernel/time/hrtimer.c @@ -1646,6 +1646,25 @@ void hrtimer_init_on_stack(struct hrtimer *timer, clockid_t clock_id, } EXPORT_SYMBOL_GPL(hrtimer_init_on_stack); +/** + * hrtimer_setup_on_stack - initialize a timer on stack memory + * @timer: The timer to be initialized + * @function: the callback function + * @clock_id: The clock to be used + * @mode: The timer mode + * + * Similar to hrtimer_setup(), except that this one must be used if struct hrtimer is in stack + * memory. + */ +void hrtimer_setup_on_stack(struct hrtimer *timer, + enum hrtimer_restart (*function)(struct hrtimer *), + clockid_t clock_id, enum hrtimer_mode mode) +{ + debug_init_on_stack(timer, clock_id, mode); + __hrtimer_setup(timer, function, clock_id, mode); +} +EXPORT_SYMBOL_GPL(hrtimer_setup_on_stack); + /* * A timer is active, when it is enqueued into the rbtree or the * callback function is running or it's in the state of being migrated |