[IPV6]: Use the {DEFINE|REF}_PROTO_INUSE infrastructure

Trivial patch to make "tcpv6,udpv6,udplitev6,rawv6" protocols uses the
fast "inuse sockets" infrastructure

Each protocol use then a static percpu var, instead of a dynamic one.
This saves some ram and some cpu cycles
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv6/raw.c

@@ -1144,6 +1144,8 @@ static int rawv6_init_sk(struct sock *sk)
 	return(0);
 }
 
+DEFINE_PROTO_INUSE(rawv6)
+
 struct proto rawv6_prot = {
 	.name		   = "RAWv6",
 	.owner		   = THIS_MODULE,
@@ -1166,6 +1168,7 @@ struct proto rawv6_prot = {
 	.compat_setsockopt = compat_rawv6_setsockopt,
 	.compat_getsockopt = compat_rawv6_getsockopt,
 #endif
+	REF_PROTO_INUSE(rawv6)
 };
 
 #ifdef CONFIG_PROC_FS

net/ipv6/tcp_ipv6.c

@@ -2107,6 +2107,8 @@ void tcp6_proc_exit(void)
 }
 #endif
 
+DEFINE_PROTO_INUSE(tcpv6)
+
 struct proto tcpv6_prot = {
 	.name			= "TCPv6",
 	.owner			= THIS_MODULE,
@@ -2141,6 +2143,7 @@ struct proto tcpv6_prot = {
 	.compat_setsockopt	= compat_tcp_setsockopt,
 	.compat_getsockopt	= compat_tcp_getsockopt,
 #endif
+	REF_PROTO_INUSE(tcpv6)
 };
 
 static struct inet6_protocol tcpv6_protocol = {

net/ipv6/udp.c

@@ -970,6 +970,8 @@ void udp6_proc_exit(void) {
 
 /* ------------------------------------------------------------------------ */
 
+DEFINE_PROTO_INUSE(udpv6)
+
 struct proto udpv6_prot = {
 	.name		   = "UDPv6",
 	.owner		   = THIS_MODULE,
@@ -991,6 +993,7 @@ struct proto udpv6_prot = {
 	.compat_setsockopt = compat_udpv6_setsockopt,
 	.compat_getsockopt = compat_udpv6_getsockopt,
 #endif
+	REF_PROTO_INUSE(udpv6)
 };
 
 static struct inet_protosw udpv6_protosw = {

net/ipv6/udplite.c

@@ -40,6 +40,8 @@ static int udplite_v6_get_port(struct sock *sk, unsigned short snum)
 	return udplite_get_port(sk, snum, ipv6_rcv_saddr_equal);
 }
 
+DEFINE_PROTO_INUSE(udplitev6)
+
 struct proto udplitev6_prot = {
 	.name		   = "UDPLITEv6",
 	.owner		   = THIS_MODULE,
@@ -62,6 +64,7 @@ struct proto udplitev6_prot = {
 	.compat_setsockopt = compat_udpv6_setsockopt,
 	.compat_getsockopt = compat_udpv6_getsockopt,
 #endif
+	REF_PROTO_INUSE(udplitev6)
 };
 
 static struct inet_protosw udplite6_protosw = {