AUDIO_DRAIN
while (ioctl(fd, AUDIO_DRAIN, 0) < 0) {
{ (uint_t)AUDIO_DRAIN, "AUDIO_DRAIN", NULL }, /* 3 */
if (*(int *)(void *)mp->b_rptr == AUDIO_DRAIN) {
ASSERT((*(int *)(void *)mp->b_rptr) == AUDIO_DRAIN);