net: fill in MODULE_DESCRIPTION()s for ipv6 modules

W=1 builds now warn if module is built without a MODULE_DESCRIPTION().
Add descriptions to the IPv6 modules.
Signed-off-by: Breno Leitao <leitao@debian.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20240208164244.3818498-6-leitao@debian.orgSigned-off-by: Jakub Kicinski <kuba@kernel.org>

net/ipv6/ah6.c

@@ -800,5 +800,6 @@ static void __exit ah6_fini(void)
 module_init(ah6_init);
 module_exit(ah6_fini);
 
+MODULE_DESCRIPTION("IPv6 AH transformation helpers");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS_XFRM_TYPE(AF_INET6, XFRM_PROTO_AH);

net/ipv6/esp6.c

@@ -1301,5 +1301,6 @@ static void __exit esp6_fini(void)
 module_init(esp6_init);
 module_exit(esp6_fini);
 
+MODULE_DESCRIPTION("IPv6 ESP transformation helpers");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS_XFRM_TYPE(AF_INET6, XFRM_PROTO_ESP);

net/ipv6/ip6_udp_tunnel.c

@@ -182,4 +182,5 @@ struct dst_entry *udp_tunnel6_dst_lookup(struct sk_buff *skb,
 }
 EXPORT_SYMBOL_GPL(udp_tunnel6_dst_lookup);
 
+MODULE_DESCRIPTION("IPv6 Foo over UDP tunnel driver");
 MODULE_LICENSE("GPL");

net/ipv6/mip6.c

@@ -405,6 +405,7 @@ static void __exit mip6_fini(void)
 module_init(mip6_init);
 module_exit(mip6_fini);
 
+MODULE_DESCRIPTION("IPv6 Mobility driver");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS_XFRM_TYPE(AF_INET6, XFRM_PROTO_DSTOPTS);
 MODULE_ALIAS_XFRM_TYPE(AF_INET6, XFRM_PROTO_ROUTING);

net/ipv6/sit.c

@@ -1956,6 +1956,7 @@ static int __init sit_init(void)
 
 module_init(sit_init);
 module_exit(sit_cleanup);
+MODULE_DESCRIPTION("IPv6-in-IPv4 tunnel SIT driver");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS_RTNL_LINK("sit");
 MODULE_ALIAS_NETDEV("sit0");

net/ipv6/tunnel6.c

@@ -302,4 +302,5 @@ static void __exit tunnel6_fini(void)
 
 module_init(tunnel6_init);
 module_exit(tunnel6_fini);
+MODULE_DESCRIPTION("IP-in-IPv6 tunnel driver");
 MODULE_LICENSE("GPL");

net/ipv6/xfrm6_tunnel.c

@@ -401,5 +401,6 @@ static void __exit xfrm6_tunnel_fini(void)
 
 module_init(xfrm6_tunnel_init);
 module_exit(xfrm6_tunnel_fini);
+MODULE_DESCRIPTION("IPv6 XFRM tunnel driver");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS_XFRM_TYPE(AF_INET6, XFRM_PROTO_IPV6);