void schedule_usleep(unsigned long us)
{
  struct fast_timer t;
#ifdef DECLARE_WAITQUEUE
  wait_queue_head_t sleep_wait;
  init_waitqueue_head(&sleep_wait);
  {
  DECLARE_WAITQUEUE(wait, current);
#else
  struct wait_queue *sleep_wait = NULL;
  struct wait_queue wait = { current, NULL };
#endif

  D1(printk("schedule_usleep(%d)\n", us));
  add_wait_queue(&sleep_wait, &wait);
  set_current_state(TASK_INTERRUPTIBLE);
  start_one_shot_timer(&t, wake_up_func, (unsigned long)&sleep_wait, us,
                       "usleep");
  schedule();
  set_current_state(TASK_RUNNING);
  remove_wait_queue(&sleep_wait, &wait);
  D1(printk("done schedule_usleep(%d)\n", us));
#ifdef DECLARE_WAITQUEUE
  }
#endif  
}
}