[IPV6]: Remove sockets from ip6_tunnel.c

include/net/ip6_tunnel.h

@@ -25,6 +25,8 @@ struct ip6_tnl {
 	int recursion;		/* depth of hard_start_xmit recursion */
 	struct ip6_tnl_parm parms;	/* tunnel configuration paramters */
 	struct flowi fl;	/* flowi template for xmit */
+	struct dst_entry *dst_cache;    /* cached dst */
+	u32 dst_cookie;
 };
 
 /* Tunnel encapsulation limit destination sub-option */

net/ipv6/ipv6_syms.c

@@ -45,3 +45,4 @@ EXPORT_SYMBOL(ipv6_ext_hdr);
 EXPORT_SYMBOL(ip6_append_data);
 EXPORT_SYMBOL(ip6_flush_pending_frames);
 EXPORT_SYMBOL(ip6_push_pending_frames);
+EXPORT_SYMBOL(ipv6_push_nfrag_opts);