42 	struct xfs_defer_drain	*dr)  in xfs_defer_drain_init()  argument
44 	atomic_set(&dr->dr_count, 0);  in xfs_defer_drain_init()
45 	init_waitqueue_head(&dr->dr_waiters);  in xfs_defer_drain_init()
49 xfs_defer_drain_free(struct xfs_defer_drain	*dr)  in xfs_defer_drain_free()  argument
51 	ASSERT(atomic_read(&dr->dr_count) == 0);  in xfs_defer_drain_free()
55 static inline void xfs_defer_drain_grab(struct xfs_defer_drain *dr)  in xfs_defer_drain_grab()  argument
57 	atomic_inc(&dr->dr_count);  in xfs_defer_drain_grab()
71 static inline void xfs_defer_drain_rele(struct xfs_defer_drain *dr)  in xfs_defer_drain_rele()  argument
73 	if (atomic_dec_and_test(&dr->dr_count) &&  in xfs_defer_drain_rele()
75 	    has_waiters(&dr->dr_waiters))  in xfs_defer_drain_rele()
76 		wake_up(&dr->dr_waiters);  in xfs_defer_drain_rele()
80 static inline bool xfs_defer_drain_busy(struct xfs_defer_drain *dr)  in xfs_defer_drain_busy()  argument
82 	return atomic_read(&dr->dr_count) > 0;  in xfs_defer_drain_busy()
91 static inline int xfs_defer_drain_wait(struct xfs_defer_drain *dr)  in xfs_defer_drain_wait()  argument
93 	return wait_event_killable(dr->dr_waiters, !xfs_defer_drain_busy(dr));  in xfs_defer_drain_wait()