[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/include/net/route.h b/include/net/route.h
index 28dba925663c..c6338802e8f1 100644
--- a/include/net/route.h
+++ b/include/net/route.h
@@ -160,7 +160,7 @@ static inline int ip_route_connect(struct rtable **rp, __be32 dst,
                                          .dport = dport } } };
 
         int err;
-        struct net *net = sk->sk_net;
+        struct net *net = sock_net(sk);
         if (!dst || !src) {
                 err = __ip_route_output_key(net, rp, &fl);
                 if (err)
@@ -188,7 +188,7 @@ static inline int ip_route_newports(struct rtable **rp, u8 protocol,
                 ip_rt_put(*rp);
                 *rp = NULL;
                 security_sk_classify_flow(sk, &fl);
-                return ip_route_output_flow(sk->sk_net, rp, &fl, sk, 0);
+                return ip_route_output_flow(sock_net(sk), rp, &fl, sk, 0);
         }
         return 0;
 }