-#define nfs_lock ((int (*) __P((struct vop_lock_args *)))vop_nolock)
-#define nfs_unlock ((int (*) __P((struct vop_unlock_args *)))vop_nounlock)
-#define nfs_islocked ((int (*) __P((struct vop_islocked_args *)))vop_noislocked)
+int nfs_lock __P((struct vop_lock_args *));
+int nfs_unlock __P((struct vop_unlock_args *));
+int nfs_islocked __P((struct vop_islocked_args *));
+