SNDRV_RAWMIDI_IOCTL_DRAIN 664 include/uapi/sound/asound.h #define SNDRV_RAWMIDI_IOCTL_DRAIN _IOW('W', 0x31, int) SNDRV_RAWMIDI_IOCTL_DRAIN 664 tools/include/uapi/sound/asound.h #define SNDRV_RAWMIDI_IOCTL_DRAIN _IOW('W', 0x31, int)