[NET] NETNS: Omit sock->sk_net without CONFIG_NET_NS.

Introduce per-sock inlines: sock_net(), sock_net_set()
and per-inet_timewait_sock inlines: twsk_net(), twsk_net_set().
Without CONFIG_NET_NS, no namespace other than &init_net exists.
Let's explicitly define them to help compiler optimizations.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c
index d13c5f12bb32..a7fcaf205644 100644
--- a/net/ipv4/inet_connection_sock.c
+++ b/net/ipv4/inet_connection_sock.c
@@ -85,7 +85,7 @@ int inet_csk_get_port(struct sock *sk, unsigned short snum)
         struct hlist_node *node;
         struct inet_bind_bucket *tb;
         int ret;
-        struct net *net = sk->sk_net;
+        struct net *net = sock_net(sk);
 
         local_bh_disable();
         if (!snum) {
@@ -333,7 +333,7 @@ struct dst_entry* inet_csk_route_req(struct sock *sk,
                                          .dport = ireq->rmt_port } } };
 
         security_req_classify_flow(req, &fl);
-        if (ip_route_output_flow(sk->sk_net, &rt, &fl, sk, 0)) {
+        if (ip_route_output_flow(sock_net(sk), &rt, &fl, sk, 0)) {
                 IP_INC_STATS_BH(IPSTATS_MIB_OUTNOROUTES);
                 return NULL;
         }