diff options
| -rw-r--r-- | include/linux/clockchips.h | 6 | ||||
| -rw-r--r-- | kernel/time/tick-broadcast.c | 12 |
2 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/clockchips.h b/include/linux/clockchips.h index 494d33ea78f..646aac136ee 100644 --- a/include/linux/clockchips.h +++ b/include/linux/clockchips.h @@ -175,6 +175,12 @@ extern void tick_broadcast(const struct cpumask *mask); extern int tick_receive_broadcast(void); #endif +#if defined(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST) && defined(CONFIG_TICK_ONESHOT) +extern int tick_check_broadcast_expired(void); +#else +static inline int tick_check_broadcast_expired(void) { return 0; } +#endif + #ifdef CONFIG_GENERIC_CLOCKEVENTS extern void clockevents_notify(unsigned long reason, void *arg); #else diff --git a/kernel/time/tick-broadcast.c b/kernel/time/tick-broadcast.c index 2100aad6b5f..d76d816afc5 100644 --- a/kernel/time/tick-broadcast.c +++ b/kernel/time/tick-broadcast.c @@ -404,6 +404,18 @@ struct cpumask *tick_get_broadcast_oneshot_mask(void) } /* + * Called before going idle with interrupts disabled. Checks whether a + * broadcast event from the other core is about to happen. We detected + * that in tick_broadcast_oneshot_control(). The callsite can use this + * to avoid a deep idle transition as we are about to get the + * broadcast IPI right away. + */ +int tick_check_broadcast_expired(void) +{ + return cpumask_test_cpu(smp_processor_id(), tick_broadcast_force_mask); +} + +/* * Set broadcast interrupt affinity */ static void tick_broadcast_set_affinity(struct clock_event_device *bc, |