SNDRV_PCM_IOCTL_UNLINK 605 include/uapi/sound/asound.h #define SNDRV_PCM_IOCTL_UNLINK _IO('A', 0x61) SNDRV_PCM_IOCTL_UNLINK 605 tools/include/uapi/sound/asound.h #define SNDRV_PCM_IOCTL_UNLINK _IO('A', 0x61)