optv6            3825 net/socket.c   	struct ipv6_txoptions *optv6 = NULL;
optv6            3845 net/socket.c   			optv6 = rcu_dereference_protected(np->opt,
optv6            3847 net/socket.c   		if (optv6)
optv6            3848 net/socket.c   			overhead += (optv6->opt_flen + optv6->opt_nflen);