diff options
| author | Frederic Weisbecker <[email protected]> | 2020-11-13 13:13:33 +0100 |
|---|---|---|
| committer | Paul E. McKenney <[email protected]> | 2021-01-06 16:24:59 -0800 |
| commit | dcd42591ebb8a25895b551a5297ea9c24414ba54 (patch) | |
| tree | eec399bc78a189494237e0e3842098b2b8591e9b | |
| parent | 43759fe5a137389e94ed6d4680c3c63c17273158 (diff) | |
timer: Add timer_curr_running()
This commit adds a timer_curr_running() function that verifies that the
current code is running in the context of the specified timer's handler.
Cc: Josh Triplett <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Mathieu Desnoyers <[email protected]>
Cc: Lai Jiangshan <[email protected]>
Cc: Joel Fernandes <[email protected]>
Cc: Neeraj Upadhyay <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Tested-by: Boqun Feng <[email protected]>
Signed-off-by: Frederic Weisbecker <[email protected]>
Signed-off-by: Paul E. McKenney <[email protected]>
| -rw-r--r-- | include/linux/timer.h | 2 | ||||
| -rw-r--r-- | kernel/time/timer.c | 13 |
2 files changed, 15 insertions, 0 deletions
diff --git a/include/linux/timer.h b/include/linux/timer.h index fda13c9d1256..4118a97e62fb 100644 --- a/include/linux/timer.h +++ b/include/linux/timer.h @@ -192,6 +192,8 @@ extern int try_to_del_timer_sync(struct timer_list *timer); #define del_singleshot_timer_sync(t) del_timer_sync(t) +extern bool timer_curr_running(struct timer_list *timer); + extern void init_timers(void); struct hrtimer; extern enum hrtimer_restart it_real_fn(struct hrtimer *); diff --git a/kernel/time/timer.c b/kernel/time/timer.c index 8dbc008f8942..f9b2096456e5 100644 --- a/kernel/time/timer.c +++ b/kernel/time/timer.c @@ -1237,6 +1237,19 @@ int try_to_del_timer_sync(struct timer_list *timer) } EXPORT_SYMBOL(try_to_del_timer_sync); +bool timer_curr_running(struct timer_list *timer) +{ + int i; + + for (i = 0; i < NR_BASES; i++) { + struct timer_base *base = this_cpu_ptr(&timer_bases[i]); + if (base->running_timer == timer) + return true; + } + + return false; +} + #ifdef CONFIG_PREEMPT_RT static __init void timer_base_init_expiry_lock(struct timer_base *base) { |