snd_ctl_elem_info 786 include/sound/asound.h struct snd_ctl_elem_info { snd_ctl_elem_info 853 include/sound/asound.h SNDRV_CTL_IOCTL_ELEM_INFO = _IOWR('U', 0x11, struct snd_ctl_elem_info), snd_ctl_elem_info 859 include/sound/asound.h SNDRV_CTL_IOCTL_ELEM_ADD = _IOWR('U', 0x17, struct snd_ctl_elem_info), snd_ctl_elem_info 860 include/sound/asound.h SNDRV_CTL_IOCTL_ELEM_REPLACE = _IOWR('U', 0x18, struct snd_ctl_elem_info), snd_ctl_elem_info 634 sound/core/control.c static int snd_ctl_elem_info(struct snd_ctl_file *ctl,