23 struct rb_node {  struct
25 	struct rb_node *rb_right;  argument
26 	struct rb_node *rb_left;  argument
31 	struct rb_node *rb_node;  member
34 #define rb_parent(r)   ((struct rb_node *)((r)->__rb_parent_color & ~3))
39 #define RB_EMPTY_ROOT(root)  (READ_ONCE((root)->rb_node) == NULL)
48 extern void rb_insert_color(struct rb_node *, struct rb_root *);
49 extern void rb_erase(struct rb_node *, struct rb_root *);
53 extern struct rb_node *rb_next(const struct rb_node *);
54 extern struct rb_node *rb_prev(const struct rb_node *);
55 extern struct rb_node *rb_first(const struct rb_root *);
56 extern struct rb_node *rb_last(const struct rb_root *);
59 extern struct rb_node *rb_first_postorder(const struct rb_root *);
60 extern struct rb_node *rb_next_postorder(const struct rb_node *);
63 extern void rb_replace_node(struct rb_node *victim, struct rb_node *new,
66 static inline void rb_link_node(struct rb_node *node, struct rb_node *parent,  in rb_link_node()
67 				struct rb_node **rb_link)  in rb_link_node()
103 static inline void rb_erase_init(struct rb_node *n, struct rb_root *root)  in rb_erase_init()
121 	struct rb_node *rb_leftmost;
129 static inline void rb_insert_color_cached(struct rb_node *node,  in rb_insert_color_cached()
138 static inline void rb_erase_cached(struct rb_node *node,  in rb_erase_cached()
146 static inline void rb_replace_node_cached(struct rb_node *victim,  in rb_replace_node_cached()
147 					  struct rb_node *new,  in rb_replace_node_cached()