rb_print_state
enum rb_print_state rb_print_next_state(struct rbnode __arena *rbnode,
enum rb_print_state state, u64 *next)
int rb_print_pop_up(struct rbnode __arena **rbnodep, u8 *depthp, enum rb_print_state (*stack)[RB_MAXLVL_PRINT], enum rb_print_state *state)
enum rb_print_state stack[RB_MAXLVL_PRINT];
enum rb_print_state state;
enum rb_print_state stack[RB_MAXLVL_PRINT];
enum rb_print_state state;