[PATCH] ppc64: fixes for compile with CONFIG_PROC_DEVICETREE=n, from Nathan Lynch

From: Anton Blanchard <anton@samba.org>

- nop out proc_device_tree_add_node if CONFIG_PROC_DEVICETREE=n

- stubs for procfs-related functions when CONFIG_PROC_DEVICETREE=n

arch/ppc64/kernel/prom.c

@@ -2560,6 +2560,7 @@ int of_remove_node(struct device_node *np)
 	return 0;
 }
 
+#ifdef CONFIG_PROC_DEVICETREE
 /*
  * Add a node to /proc/device-tree.
  */
@@ -2592,6 +2593,17 @@ static void remove_node_proc_entries(struct device_node *np)
 	if (np->pde)
 		remove_proc_entry(np->pde->name, parent->pde);
 }
+#else /* !CONFIG_PROC_DEVICETREE */
+static void add_node_proc_entries(struct device_node *np)
+{
+	return;
+}
+
+static void remove_node_proc_entries(struct device_node *np)
+{
+	return;
+}
+#endif /* CONFIG_PROC_DEVICETREE */
 
 /*
  * Fix up the uninitialized fields in a new device node:

include/linux/proc_fs.h

@@ -133,8 +133,14 @@ extern void proc_tty_unregister_driver(struct tty_driver *driver);
  */
 struct device_node;
 extern void proc_device_tree_init(void);
+#ifdef CONFIG_PROC_DEVICETREE
 extern void proc_device_tree_add_node(struct device_node *, struct proc_dir_entry *);
-
+#else /* !CONFIG_PROC_DEVICETREE */
+static inline void proc_device_tree_add_node(struct device_node *np, struct proc_dir_entry *pde)
+{
+	return;
+}
+#endif /* CONFIG_PROC_DEVICETREE */
 /*
  * proc_rtas.c
  */