diff options
Diffstat (limited to 'include/linux/rbtree.h')
| -rw-r--r-- | include/linux/rbtree.h | 15 |
1 files changed, 5 insertions, 10 deletions
diff --git a/include/linux/rbtree.h b/include/linux/rbtree.h index e6a807720ded..2049087c43b7 100644 --- a/include/linux/rbtree.h +++ b/include/linux/rbtree.h @@ -67,17 +67,12 @@ 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)) +#define RB_EMPTY_ROOT(root) ((root)->rb_node == NULL) + +/* 'empty' nodes are nodes that are known not to be inserted in an rbree */ +#define RB_EMPTY_NODE(node) ((node)->rb_parent_color == (unsigned long)(node)) +#define RB_CLEAR_NODE(node) ((node)->rb_parent_color = (unsigned long)(node)) -static inline void rb_init_node(struct rb_node *rb) -{ - rb->rb_parent_color = 0; - rb->rb_right = NULL; - rb->rb_left = NULL; - RB_CLEAR_NODE(rb); -} extern void rb_insert_color(struct rb_node *, struct rb_root *); extern void rb_erase(struct rb_node *, struct rb_root *); |