[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>

2 files changed, 2 insertions, 2 deletions

diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c
index dc71d0d83753..036bfcc8d15b 100644
--- a/net/sctp/ipv6.c
+++ b/net/sctp/ipv6.c
@@ -636,7 +636,7 @@ static struct sock *sctp_v6_create_accept_sk(struct sock *sk,
         struct ipv6_pinfo *newnp, *np = inet6_sk(sk);
         struct sctp6_sock *newsctp6sk;
 
-        newsk = sk_alloc(sk->sk_net, PF_INET6, GFP_KERNEL, sk->sk_prot);
+        newsk = sk_alloc(sock_net(sk), PF_INET6, GFP_KERNEL, sk->sk_prot);
         if (!newsk)
                 goto out;
 
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)