SNDRV_CTL_IOCTL_PCM_PREFER_SUBDEVICE  987 include/uapi/sound/asound.h #define SNDRV_CTL_IOCTL_PCM_PREFER_SUBDEVICE _IOW('U', 0x32, int)
SNDRV_CTL_IOCTL_PCM_PREFER_SUBDEVICE  987 tools/include/uapi/sound/asound.h #define SNDRV_CTL_IOCTL_PCM_PREFER_SUBDEVICE _IOW('U', 0x32, int)