hd_async_queue 97 drivers/char/hpet.c struct fasync_struct *hd_async_queue; hd_async_queue 193 drivers/char/hpet.c kill_fasync(&devp->hd_async_queue, SIGIO, POLL_IN); hd_async_queue 409 drivers/char/hpet.c if (fasync_helper(fd, file, on, &devp->hd_async_queue) >= 0)