[PATCH] rbtree: fixed reversed RB_EMPTY_NODE and rb_next/prev

The conditions got reserved. Also make rb_next() and rb_prev() check
for the empty condition.

Signed-off-by: Jens Axboe <axboe@suse.de>

1 files changed, 1 insertions, 1 deletions

diff --git a/include/linux/rbtree.h b/include/linux/rbtree.h
index 8d5382e62c08..344bc3495ddb 100644
--- a/include/linux/rbtree.h
+++ b/include/linux/rbtree.h
@@ -133,7 +133,7 @@ static inline void rb_set_color(struct rb_node *rb, int color)
 #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_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 *);