ipv6_mc_down      145 include/net/addrconf.h extern void ipv6_mc_down(struct inet6_dev *idev);
ipv6_mc_down     2694 net/ipv6/addrconf.c 		ipv6_mc_down(idev);
ipv6_mc_down     2308 net/ipv6/mcast.c 	ipv6_mc_down(idev);