net: rtnetlink: validate IFLA_MTU attribute in rtnl_create_link()

[mirror_ubuntu-bionic-kernel.git] / include / linux / hrtimer.h

diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h
index 012c37fdb688cb2c169530eb821c02abed2bcdd5..5511dc963dd5359e74816d90854fe71f34bd2f47 100644 (file)
--- a/include/linux/hrtimer.h
+++ b/include/linux/hrtimer.h
@@ -408,12 +408,18 @@ extern u64 hrtimer_get_next_event(void);
 
 extern bool hrtimer_active(const struct hrtimer *timer);
 
-/*
- * Helper function to check, whether the timer is on one of the queues
+/**
+ * hrtimer_is_queued = check, whether the timer is on one of the queues
+ * @timer:     Timer to check
+ *
+ * Returns: True if the timer is queued, false otherwise
+ *
+ * The function can be used lockless, but it gives only a current snapshot.
  */
-static inline int hrtimer_is_queued(struct hrtimer *timer)
+static inline bool hrtimer_is_queued(struct hrtimer *timer)
 {
-       return timer->state & HRTIMER_STATE_ENQUEUED;
+       /* The READ_ONCE pairs with the update functions of timer->state */
+       return !!(READ_ONCE(timer->state) & HRTIMER_STATE_ENQUEUED);
 }
 
 /*