[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, 1 insertions, 1 deletions

diff --git a/net/decnet/af_decnet.c b/net/decnet/af_decnet.c
index 3554fb3d251c..fc2efe899e91 100644
--- a/net/decnet/af_decnet.c
+++ b/net/decnet/af_decnet.c
@@ -1094,7 +1094,7 @@ static int dn_accept(struct socket *sock, struct socket *newsock, int flags)
 
         cb = DN_SKB_CB(skb);
         sk->sk_ack_backlog--;
-        newsk = dn_alloc_sock(sk->sk_net, newsock, sk->sk_allocation);
+        newsk = dn_alloc_sock(sock_net(sk), newsock, sk->sk_allocation);
         if (newsk == NULL) {
                 release_sock(sk);
                 kfree_skb(skb);