#ifndef _LINUX_TIMERQUEUE_H#define _LINUX_TIMERQUEUE_H #include <linux/rbtree.h>#include <linux/ktime.h>  struct timerqueue_node {	struct rb_node node;	ktime_t expires;}; struct timerqueue_head {	struct rb_root head;	struct timerqueue_node *next;};  extern void timerqueue_add(struct timerqueue_head *head,				struct timerqueue_node *node);extern void timerqueue_del(struct timerqueue_head *head,				struct timerqueue_node *node);extern struct timerqueue_node *timerqueue_iterate_next(						struct timerqueue_node *node); /** * timerqueue_getnext - Returns the timer with the earlies expiration time * * @head: head of timerqueue * * Returns a pointer to the timer node that has the * earliest expiration time. */static inlinestruct timerqueue_node *timerqueue_getnext(struct timerqueue_head *head){	return head->next;} static inline void timerqueue_init(struct timerqueue_node *node){	RB_CLEAR_NODE(&node->node);} static inline void timerqueue_init_head(struct timerqueue_head *head){	head->head = RB_ROOT;	head->next = NULL;}#endif /* _LINUX_TIMERQUEUE_H */