[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/sctp/protocol.c b/net/sctp/protocol.c
index 2faa0d8839eb..5aea91137fbb 100644
--- a/net/sctp/protocol.c
+++ b/net/sctp/protocol.c
@@ -554,7 +554,7 @@ static struct sock *sctp_v4_create_accept_sk(struct sock *sk,
 {
         struct inet_sock *inet = inet_sk(sk);
         struct inet_sock *newinet;
-        struct sock *newsk = sk_alloc(sk->sk_net, PF_INET, GFP_KERNEL,
+        struct sock *newsk = sk_alloc(sock_net(sk), PF_INET, GFP_KERNEL,
                         sk->sk_prot);
 
         if (!newsk)