SNDRV_RAWMIDI_IOCTL_DROP  663 include/uapi/sound/asound.h #define SNDRV_RAWMIDI_IOCTL_DROP	_IOW('W', 0x30, int)
SNDRV_RAWMIDI_IOCTL_DROP  663 tools/include/uapi/sound/asound.h #define SNDRV_RAWMIDI_IOCTL_DROP	_IOW('W', 0x30, int)