SNDRV_PCM_IOCTL_SYNC_PTR 587 include/uapi/sound/asound.h #define SNDRV_PCM_IOCTL_SYNC_PTR _IOWR('A', 0x23, struct snd_pcm_sync_ptr) SNDRV_PCM_IOCTL_SYNC_PTR 587 tools/include/uapi/sound/asound.h #define SNDRV_PCM_IOCTL_SYNC_PTR _IOWR('A', 0x23, struct snd_pcm_sync_ptr)