SNDRV_PCM_IOCTL_FORWARD 1199 sound/core/oss/pcm_oss.c err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames); SNDRV_PCM_IOCTL_FORWARD 2996 sound/core/pcm_native.c case SNDRV_PCM_IOCTL_FORWARD: SNDRV_PCM_IOCTL_FORWARD 3034 sound/core/pcm_native.c case SNDRV_PCM_IOCTL_FORWARD: