X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=include%2Flinux%2Frbtree.h;h=344bc3495ddbd12548c32ebaf57cd3c6ee7e8be9;hb=ecfd80e4a514123070b4cfb674b817ba75055df2;hp=f37006f21664877fc138b437df04b210bc81cdb2;hpb=71d530cd1b6d97094481002a04c77fea1c8e1c22;p=powerpc.git

diff --git a/include/linux/rbtree.h b/include/linux/rbtree.h
index f37006f216..344bc3495d 100644
--- a/include/linux/rbtree.h
+++ b/include/linux/rbtree.h
@@ -132,6 +132,10 @@ static inline void rb_set_color(struct rb_node *rb, int color)
 #define RB_ROOT	(struct rb_root) { NULL, }
 #define	rb_entry(ptr, type, member) container_of(ptr, type, member)
 
+#define RB_EMPTY_ROOT(root)	((root)->rb_node == NULL)
+#define RB_EMPTY_NODE(node)	(rb_parent(node) == node)
+#define RB_CLEAR_NODE(node)	(rb_set_parent(node, node))
+
 extern void rb_insert_color(struct rb_node *, struct rb_root *);
 extern void rb_erase(struct rb_node *, struct rb_root *);