MLD_QRV_DEFAULT   110 net/ipv6/mcast.c int sysctl_mld_qrv __read_mostly = MLD_QRV_DEFAULT;
MLD_QRV_DEFAULT  1227 net/ipv6/mcast.c 	const int min_qrv = min(MLD_QRV_DEFAULT, sysctl_mld_qrv);