snd_xferv 925 include/sound/asound.h struct snd_xferv { snd_xferv 931 include/sound/asound.h SNDRV_IOCTL_READV = _IOW('K', 0x00, struct snd_xferv), snd_xferv 932 include/sound/asound.h SNDRV_IOCTL_WRITEV = _IOW('K', 0x01, struct snd_xferv),