SNDRV_PCM_IOCTL_PREPARE 1095 sound/core/oss/pcm_oss.c 	err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
SNDRV_PCM_IOCTL_PREPARE  490 sound/core/pcm_compat.c 	case SNDRV_PCM_IOCTL_PREPARE:
SNDRV_PCM_IOCTL_PREPARE 2522 sound/core/pcm_native.c 	case SNDRV_PCM_IOCTL_PREPARE: