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Diffstat (limited to 'kernel/time/tick-oneshot.c')
| -rw-r--r-- | kernel/time/tick-oneshot.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/kernel/time/tick-oneshot.c b/kernel/time/tick-oneshot.c index 2e8de67..a96c0e2 100644 --- a/kernel/time/tick-oneshot.c +++ b/kernel/time/tick-oneshot.c @@ -128,6 +128,23 @@ int tick_switch_to_oneshot(void (*handler)(struct clock_event_device *)) return 0; } +/** + * tick_check_oneshot_mode - check whether the system is in oneshot mode + * + * returns 1 when either nohz or highres are enabled. otherwise 0. + */ +int tick_oneshot_mode_active(void) +{ + unsigned long flags; + int ret; + + local_irq_save(flags); + ret = __get_cpu_var(tick_cpu_device).mode == TICKDEV_MODE_ONESHOT; + local_irq_restore(flags); + + return ret; +} + #ifdef CONFIG_HIGH_RES_TIMERS /** * tick_init_highres - switch to high resolution mode |