snd_ctl_elem_id   768 include/sound/asound.h struct snd_ctl_elem_id {
snd_ctl_elem_id   856 include/sound/asound.h SNDRV_CTL_IOCTL_ELEM_LOCK = _IOW('U', 0x14, struct snd_ctl_elem_id),
snd_ctl_elem_id   857 include/sound/asound.h SNDRV_CTL_IOCTL_ELEM_UNLOCK = _IOW('U', 0x15, struct snd_ctl_elem_id),
snd_ctl_elem_id   861 include/sound/asound.h SNDRV_CTL_IOCTL_ELEM_REMOVE = _IOWR('U', 0x19, struct snd_ctl_elem_id),