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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 <josh@joshtriplett.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Lai Jiangshan <jiangshanlai@gmail.com> Cc: Joel Fernandes <joel@joelfernandes.org> Cc: Neeraj Upadhyay <neeraju@codeaurora.org> Cc: Thomas Gleixner <tglx@linutronix.de> Tested-by: Boqun Feng <boqun.feng@gmail.com> Signed-off-by: Frederic Weisbecker <frederic@kernel.org> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
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2 changed files with 15 additions and 0 deletions
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@ -192,6 +192,8 @@ extern int try_to_del_timer_sync(struct timer_list *timer);
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#define del_singleshot_timer_sync(t) del_timer_sync(t)
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#define del_singleshot_timer_sync(t) del_timer_sync(t)
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extern bool timer_curr_running(struct timer_list *timer);
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extern void init_timers(void);
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extern void init_timers(void);
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struct hrtimer;
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struct hrtimer;
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extern enum hrtimer_restart it_real_fn(struct hrtimer *);
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extern enum hrtimer_restart it_real_fn(struct hrtimer *);
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@ -1237,6 +1237,19 @@ int try_to_del_timer_sync(struct timer_list *timer)
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}
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}
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EXPORT_SYMBOL(try_to_del_timer_sync);
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EXPORT_SYMBOL(try_to_del_timer_sync);
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bool timer_curr_running(struct timer_list *timer)
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{
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int i;
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for (i = 0; i < NR_BASES; i++) {
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struct timer_base *base = this_cpu_ptr(&timer_bases[i]);
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if (base->running_timer == timer)
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return true;
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}
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return false;
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}
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#ifdef CONFIG_PREEMPT_RT
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#ifdef CONFIG_PREEMPT_RT
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static __init void timer_base_init_expiry_lock(struct timer_base *base)
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static __init void timer_base_init_expiry_lock(struct timer_base *base)
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{
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{
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