[NET]: Relax the reference counting of init_net_ns
When the CONFIG_NET_NS is n there's no need in refcounting
the initial net namespace. So relax this code by making a
stupid stubs for the "n" case.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h
index 5279466..1fd449a 100644
--- a/include/net/net_namespace.h
+++ b/include/net/net_namespace.h
@@ -51,13 +51,12 @@
}
#endif
+#ifdef CONFIG_NET_NS
extern void __put_net(struct net *net);
static inline struct net *get_net(struct net *net)
{
-#ifdef CONFIG_NET
atomic_inc(&net->count);
-#endif
return net;
}
@@ -75,26 +74,44 @@
static inline void put_net(struct net *net)
{
-#ifdef CONFIG_NET
if (atomic_dec_and_test(&net->count))
__put_net(net);
-#endif
}
static inline struct net *hold_net(struct net *net)
{
-#ifdef CONFIG_NET
atomic_inc(&net->use_count);
-#endif
return net;
}
static inline void release_net(struct net *net)
{
-#ifdef CONFIG_NET
atomic_dec(&net->use_count);
-#endif
}
+#else
+static inline struct net *get_net(struct net *net)
+{
+ return net;
+}
+
+static inline void put_net(struct net *net)
+{
+}
+
+static inline struct net *hold_net(struct net *net)
+{
+ return net;
+}
+
+static inline void release_net(struct net *net)
+{
+}
+
+static inline struct net *maybe_get_net(struct net *net)
+{
+ return net;
+}
+#endif
#define for_each_net(VAR) \
list_for_each_entry(VAR, &net_namespace_list, list)