[SOCK]: Add udp_hash member to struct proto.

Inspired by the commit ab1e0a13 ([SOCK] proto: Add hashinfo member to 
struct proto) from Arnaldo, I made similar thing for UDP/-Lite IPv4 
and -v6 protocols.

The result is not that exciting, but it removes some levels of
indirection in udpxxx_get_port and saves some space in code and text.

The first step is to union existing hashinfo and new udp_hash on the
struct proto and give a name to this union, since future initialization 
of tcpxxx_prot, dccp_vx_protinfo and udpxxx_protinfo will cause gcc 
warning about inability to initialize anonymous member this way.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 1 deletions

diff --git a/include/net/sock.h b/include/net/sock.h
index b89680d2693b..c3175c400b79 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -586,7 +586,10 @@ struct proto {
         struct request_sock_ops *rsk_prot;
         struct timewait_sock_ops *twsk_prot;
 
-        struct inet_hashinfo    *hashinfo;
+        union {
+                struct inet_hashinfo    *hashinfo;
+                struct hlist_head       *udp_hash;
+        } h;
 
         struct module           *owner;