SNDRV_PCM_IOCTL_UNLINK  500 sound/core/pcm_compat.c 	case SNDRV_PCM_IOCTL_UNLINK:
SNDRV_PCM_IOCTL_UNLINK 2530 sound/core/pcm_native.c 	case SNDRV_PCM_IOCTL_UNLINK: