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| author | Anna-Maria Behnsen <anna-maria@linutronix.de> | 2024-02-21 12:05:33 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2024-02-22 19:52:30 +0300 |
| commit | 8e7e247f64a1e0fee430aba28d9108f7598eb237 (patch) | |
| tree | 4ee3450bf1cf0bc1a1b80e15722b724cf4d42241 /include/linux/timer.h | |
| parent | 73129cf4b69cd1aaa3dd5eb7900a9c349773f5ae (diff) | |
| download | linux-8e7e247f64a1e0fee430aba28d9108f7598eb237.tar.xz | |
timers: Introduce add_timer() variants which modify timer flags
A timer might be used as a pinned timer (using add_timer_on()) and later on
as non-pinned timer using add_timer(). When the "NOHZ timer pull at expiry
model" is in place, the TIMER_PINNED flag is required to be used whenever a
timer needs to expire on a dedicated CPU. Otherwise the flag must not be
set if expiration on a dedicated CPU is not required.
add_timer_on()'s behavior will be changed during the preparation patches
for the "NOHZ timer pull at expiry model" to unconditionally set the
TIMER_PINNED flag. To be able to clear/ set the flag when queueing a
timer, two variants of add_timer() are introduced.
This is a preparatory step and has no functional change.
Signed-off-by: Anna-Maria Behnsen <anna-maria@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Frederic Weisbecker <frederic@kernel.org>
Link: https://lore.kernel.org/r/20240221090548.36600-6-anna-maria@linutronix.de
Diffstat (limited to 'include/linux/timer.h')
| -rw-r--r-- | include/linux/timer.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/timer.h b/include/linux/timer.h index f18a2f1eb79e..2be8be6dd317 100644 --- a/include/linux/timer.h +++ b/include/linux/timer.h @@ -165,6 +165,8 @@ extern int timer_reduce(struct timer_list *timer, unsigned long expires); #define NEXT_TIMER_MAX_DELTA ((1UL << 30) - 1) extern void add_timer(struct timer_list *timer); +extern void add_timer_local(struct timer_list *timer); +extern void add_timer_global(struct timer_list *timer); extern int try_to_del_timer_sync(struct timer_list *timer); extern int timer_delete_sync(struct timer_list *timer); |