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-rw-r--r--include/linux/hrtimer.h14
1 files changed, 11 insertions, 3 deletions
diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h
index bdd88df..2f245fe 100644
--- a/include/linux/hrtimer.h
+++ b/include/linux/hrtimer.h
@@ -47,14 +47,22 @@ enum hrtimer_restart {
* HRTIMER_CB_IRQSAFE: Callback may run in hardirq context
* HRTIMER_CB_IRQSAFE_NO_RESTART: Callback may run in hardirq context and
* does not restart the timer
- * HRTIMER_CB_IRQSAFE_NO_SOFTIRQ: Callback must run in hardirq context
- * Special mode for tick emultation
+ * HRTIMER_CB_IRQSAFE_PERCPU: Callback must run in hardirq context
+ * Special mode for tick emulation and
+ * scheduler timer. Such timers are per
+ * cpu and not allowed to be migrated on
+ * cpu unplug.
+ * HRTIMER_CB_IRQSAFE_UNLOCKED: Callback should run in hardirq context
+ * with timer->base lock unlocked
+ * used for timers which call wakeup to
+ * avoid lock order problems with rq->lock
*/
enum hrtimer_cb_mode {
HRTIMER_CB_SOFTIRQ,
HRTIMER_CB_IRQSAFE,
HRTIMER_CB_IRQSAFE_NO_RESTART,
- HRTIMER_CB_IRQSAFE_NO_SOFTIRQ,
+ HRTIMER_CB_IRQSAFE_PERCPU,
+ HRTIMER_CB_IRQSAFE_UNLOCKED,
};
/*
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