net: CONFIG_NET_NS reduction

Use read_pnet() and write_pnet() to reduce number of ifdef CONFIG_NET_NS

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

5 files changed, 8 insertions, 44 deletions

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index a24916156f4..bd6b75317d5 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1087,11 +1087,7 @@ static inline void netdev_for_each_tx_queue(struct net_device *dev,
 static inline
 struct net *dev_net(const struct net_device *dev)
 {
-#ifdef CONFIG_NET_NS
-	return dev->nd_net;
-#else
-	return &init_net;
-#endif
+	return read_pnet(&dev->nd_net);
 }
 
 static inline
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index b44a2e5321a..e7ebeb8bdf7 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -1330,26 +1330,15 @@ struct wiphy {
 	char priv[0] __attribute__((__aligned__(NETDEV_ALIGN)));
 };
 
-#ifdef CONFIG_NET_NS
-static inline struct net *wiphy_net(struct wiphy *wiphy)
-{
-	return wiphy->_net;
-}
-
-static inline void wiphy_net_set(struct wiphy *wiphy, struct net *net)
-{
-	wiphy->_net = net;
-}
-#else
 static inline struct net *wiphy_net(struct wiphy *wiphy)
 {
-	return &init_net;
+	return read_pnet(&wiphy->_net);
 }
 
 static inline void wiphy_net_set(struct wiphy *wiphy, struct net *net)
 {
+	write_pnet(&wiphy->_net, net);
 }
-#endif
 
 /**
  * wiphy_priv - return priv from wiphy
diff --git a/include/net/genetlink.h b/include/net/genetlink.h
index eb551baafc0..f7dcd2c7041 100644
--- a/include/net/genetlink.h
+++ b/include/net/genetlink.h
@@ -68,26 +68,15 @@ struct genl_info {
 #endif
 };
 
-#ifdef CONFIG_NET_NS
 static inline struct net *genl_info_net(struct genl_info *info)
 {
-	return info->_net;
+	return read_pnet(&info->_net);
 }
 
 static inline void genl_info_net_set(struct genl_info *info, struct net *net)
 {
-	info->_net = net;
+	write_pnet(&info->_net, net);
 }
-#else
-static inline struct net *genl_info_net(struct genl_info *info)
-{
-	return &init_net;
-}
-
-static inline void genl_info_net_set(struct genl_info *info, struct net *net)
-{
-}
-#endif
 
 /**
  * struct genl_ops - generic netlink operations
diff --git a/include/net/netfilter/nf_conntrack.h b/include/net/netfilter/nf_conntrack.h
index bde095f7e84..bbfdd945308 100644
--- a/include/net/netfilter/nf_conntrack.h
+++ b/include/net/netfilter/nf_conntrack.h
@@ -152,11 +152,7 @@ extern struct net init_net;
 
 static inline struct net *nf_ct_net(const struct nf_conn *ct)
 {
-#ifdef CONFIG_NET_NS
-	return ct->ct_net;
-#else
-	return &init_net;
-#endif
+	return read_pnet(&ct->ct_net);
 }
 
 /* Alter reply tuple (maybe alter helper). */
diff --git a/include/net/sock.h b/include/net/sock.h
index ca241ea1487..3461e5d1e9a 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -1724,19 +1724,13 @@ static inline void sk_eat_skb(struct sock *sk, struct sk_buff *skb, int copied_e
 static inline
 struct net *sock_net(const struct sock *sk)
 {
-#ifdef CONFIG_NET_NS
-	return sk->sk_net;
-#else
-	return &init_net;
-#endif
+	return read_pnet(&sk->sk_net);
 }
 
 static inline
 void sock_net_set(struct sock *sk, struct net *net)
 {
-#ifdef CONFIG_NET_NS
-	sk->sk_net = net;
-#endif
+	write_pnet(&sk->sk_net, net);
 }
 
 /*