XENSND_OP_OPEN     96 sound/xen/xen_snd_front.c 	req = be_stream_prepare_req(evtchnl, XENSND_OP_OPEN);
XENSND_OP_OPEN     48 sound/xen/xen_snd_front_evtchnl.c 		case XENSND_OP_OPEN: