[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, 3 insertions, 3 deletions

diff --git a/net/ipv6/addrlabel.c b/net/ipv6/addrlabel.c
index de371b5997fe..9bfa8846f262 100644
--- a/net/ipv6/addrlabel.c
+++ b/net/ipv6/addrlabel.c
@@ -364,7 +364,7 @@ static const struct nla_policy ifal_policy[IFAL_MAX+1] = {
 static int ip6addrlbl_newdel(struct sk_buff *skb, struct nlmsghdr *nlh,
                              void *arg)
 {
-        struct net *net = skb->sk->sk_net;
+        struct net *net = sock_net(skb->sk);
         struct ifaddrlblmsg *ifal;
         struct nlattr *tb[IFAL_MAX+1];
         struct in6_addr *pfx;
@@ -452,7 +452,7 @@ static int ip6addrlbl_fill(struct sk_buff *skb,
 
 static int ip6addrlbl_dump(struct sk_buff *skb, struct netlink_callback *cb)
 {
-        struct net *net = skb->sk->sk_net;
+        struct net *net = sock_net(skb->sk);
         struct ip6addrlbl_entry *p;
         struct hlist_node *pos;
         int idx = 0, s_idx = cb->args[0];
@@ -490,7 +490,7 @@ static inline int ip6addrlbl_msgsize(void)
 static int ip6addrlbl_get(struct sk_buff *in_skb, struct nlmsghdr* nlh,
                           void *arg)
 {
-        struct net *net = in_skb->sk->sk_net;
+        struct net *net = sock_net(in_skb->sk);
         struct ifaddrlblmsg *ifal;
         struct nlattr *tb[IFAL_MAX+1];
         struct in6_addr *addr;