-#define LINUX_WAITQ(w) ((wait_queue_t *) w)
-#define LINUX_WAITQ_HEAD(w) ((wait_queue_head_t *) w)
-
-void
-cfs_waitq_init(cfs_waitq_t *waitq)
-{
- init_waitqueue_head(LINUX_WAITQ_HEAD(waitq));
-}
-EXPORT_SYMBOL(cfs_waitq_init);
-
-void
-cfs_waitlink_init(cfs_waitlink_t *link)
-{
- init_waitqueue_entry(LINUX_WAITQ(link), current);
-}
-EXPORT_SYMBOL(cfs_waitlink_init);
-
-void
-cfs_waitq_add(cfs_waitq_t *waitq, cfs_waitlink_t *link)
-{
- add_wait_queue(LINUX_WAITQ_HEAD(waitq), LINUX_WAITQ(link));
-}
-EXPORT_SYMBOL(cfs_waitq_add);
-
-#ifndef HAVE___ADD_WAIT_QUEUE_EXCLUSIVE
-
-static inline void __add_wait_queue_exclusive(wait_queue_head_t *q,
- wait_queue_t *wait)
-{
- wait->flags |= WQ_FLAG_EXCLUSIVE;
- __add_wait_queue(q, wait);
-}
-
-#endif /* HAVE___ADD_WAIT_QUEUE_EXCLUSIVE */
-
-void
-cfs_waitq_add_exclusive(cfs_waitq_t *waitq,
- cfs_waitlink_t *link)
-{
- add_wait_queue_exclusive(LINUX_WAITQ_HEAD(waitq), LINUX_WAITQ(link));
-}
-EXPORT_SYMBOL(cfs_waitq_add_exclusive);
-
-/**
- * wait_queue_t of Linux (version < 2.6.34) is a FIFO list for exclusively
- * waiting threads, which is not always desirable because all threads will
- * be waken up again and again, even user only needs a few of them to be
- * active most time. This is not good for performance because cache can
- * be polluted by different threads.
- *
- * LIFO list can resolve this problem because we always wakeup the most
- * recent active thread by default.
- *
- * NB: please don't call non-exclusive & exclusive wait on the same
- * waitq if cfs_waitq_add_exclusive_head is used.
- */
-void
-cfs_waitq_add_exclusive_head(cfs_waitq_t *waitq, cfs_waitlink_t *link)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&LINUX_WAITQ_HEAD(waitq)->lock, flags);
- __add_wait_queue_exclusive(LINUX_WAITQ_HEAD(waitq), LINUX_WAITQ(link));
- spin_unlock_irqrestore(&LINUX_WAITQ_HEAD(waitq)->lock, flags);
-}
-EXPORT_SYMBOL(cfs_waitq_add_exclusive_head);
-
-void
-cfs_waitq_del(cfs_waitq_t *waitq, cfs_waitlink_t *link)
-{
- remove_wait_queue(LINUX_WAITQ_HEAD(waitq), LINUX_WAITQ(link));
-}
-EXPORT_SYMBOL(cfs_waitq_del);
-
-int
-cfs_waitq_active(cfs_waitq_t *waitq)
-{
- return waitqueue_active(LINUX_WAITQ_HEAD(waitq));
-}
-EXPORT_SYMBOL(cfs_waitq_active);
-
-void
-cfs_waitq_signal(cfs_waitq_t *waitq)
-{
- wake_up(LINUX_WAITQ_HEAD(waitq));
-}
-EXPORT_SYMBOL(cfs_waitq_signal);
-
-void
-cfs_waitq_signal_nr(cfs_waitq_t *waitq, int nr)
-{
- wake_up_nr(LINUX_WAITQ_HEAD(waitq), nr);
-}
-EXPORT_SYMBOL(cfs_waitq_signal_nr);
-
-void
-cfs_waitq_broadcast(cfs_waitq_t *waitq)
-{
- wake_up_all(LINUX_WAITQ_HEAD(waitq));
-}
-EXPORT_SYMBOL(cfs_waitq_broadcast);
-
-void
-cfs_waitq_wait(cfs_waitlink_t *link, cfs_task_state_t state)
-{
- schedule();
-}
-EXPORT_SYMBOL(cfs_waitq_wait);
-
-int64_t
-cfs_waitq_timedwait(cfs_waitlink_t *link, cfs_task_state_t state,
- int64_t timeout)
-{
- return schedule_timeout(timeout);
-}
-EXPORT_SYMBOL(cfs_waitq_timedwait);
-
-void
-cfs_schedule_timeout_and_set_state(cfs_task_state_t state, int64_t timeout)
-{
- set_current_state(state);
- schedule_timeout(timeout);
-}
-EXPORT_SYMBOL(cfs_schedule_timeout_and_set_state);
-
-void
-cfs_schedule_timeout(int64_t timeout)
-{
- schedule_timeout(timeout);
-}
-EXPORT_SYMBOL(cfs_schedule_timeout);
-
-void
-cfs_schedule(void)
-{
- schedule();
-}
-EXPORT_SYMBOL(cfs_schedule);
-
-/* deschedule for a bit... */
-void
-cfs_pause(cfs_duration_t ticks)
-{
- set_current_state(TASK_UNINTERRUPTIBLE);
- schedule_timeout(ticks);
-}
-EXPORT_SYMBOL(cfs_pause);
-
-int cfs_need_resched(void)
-{
- return need_resched();
-}
-EXPORT_SYMBOL(cfs_need_resched);
-
-void cfs_cond_resched(void)
-{
- cond_resched();
-}
-EXPORT_SYMBOL(cfs_cond_resched);
-