mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 06:34:11 +08:00
c320642e1c
The hrtimer code is interested whether the added timer is the first one to expire and whether the removed timer was the last one in the tree. The add/del routines have that information already. So we can return it right away instead of reevaluating it at the call site. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Peter Zijlstra <peterz@infradead.org> Cc: Preeti U Murthy <preeti@linux.vnet.ibm.com> Cc: Viresh Kumar <viresh.kumar@linaro.org> Cc: Marcelo Tosatti <mtosatti@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: John Stultz <john.stultz@linaro.org> Link: http://lkml.kernel.org/r/20150414203501.579063647@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
#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 bool timerqueue_add(struct timerqueue_head *head,
|
|
struct timerqueue_node *node);
|
|
extern bool 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 earliest expiration time
|
|
*
|
|
* @head: head of timerqueue
|
|
*
|
|
* Returns a pointer to the timer node that has the
|
|
* earliest expiration time.
|
|
*/
|
|
static inline
|
|
struct 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 */
|