usb_audio_feature_unit  198 dev/usb/uaudio.c 		const struct usb_audio_feature_unit *fu;
usb_audio_feature_unit 1081 dev/usb/uaudio.c 	const struct usb_audio_feature_unit *d = iot[id].d.fu;
usb_audio_feature_unit  193 dev/usb/uaudioreg.h struct usb_audio_feature_unit {