Symbol: SNDRV_PCM_IOCTL_FORWARD
sound/core/oss/pcm_oss.c
1220
err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
sound/core/pcm_native.c
3465
case SNDRV_PCM_IOCTL_FORWARD:
sound/core/pcm_native.c
3508
case SNDRV_PCM_IOCTL_FORWARD: