diff --git a/include/linux/proc_fs.h b/include/linux/proc_fs.h
index 5964670..20741f6 100644
--- a/include/linux/proc_fs.h
+++ b/include/linux/proc_fs.h
@@ -270,10 +270,7 @@
 	return pde->parent->data;
 }
 
-static inline struct net *PROC_NET(const struct inode *inode)
-{
-	return PDE_NET(PDE(inode));
-}
+struct net *get_proc_net(const struct inode *inode);
 
 struct proc_maps_private {
 	struct pid *pid;
diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h
index 3081b6e..ac8f8304 100644
--- a/include/net/net_namespace.h
+++ b/include/net/net_namespace.h
@@ -46,6 +46,18 @@
 	return net;
 }
 
+static inline struct net *maybe_get_net(struct net *net)
+{
+	/* Used when we know struct net exists but we
+	 * aren't guaranteed a previous reference count
+	 * exists.  If the reference count is zero this
+	 * function fails and returns NULL.
+	 */
+	if (!atomic_inc_not_zero(&net->count))
+		net = NULL;
+	return net;
+}
+
 static inline void put_net(struct net *net)
 {
 	if (atomic_dec_and_test(&net->count))