driver model: constify attribute groups

Let attribute group vectors be declared "const".  We'd
like to let most attribute metadata live in read-only
sections... this is a start.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

include/linux/attribute_container.h

@@ -17,7 +17,7 @@ struct attribute_container {
 	struct list_head	node;
 	struct klist		containers;
 	struct class		*class;
-	struct attribute_group	*grp;
+	const struct attribute_group *grp;
 	struct device_attribute **attrs;
 	int (*match)(struct attribute_container *, struct device *);
 #define	ATTRIBUTE_CONTAINER_NO_CLASSDEVS	0x01

include/linux/device.h

@@ -131,7 +131,7 @@ struct device_driver {
 	void (*shutdown) (struct device *dev);
 	int (*suspend) (struct device *dev, pm_message_t state);
 	int (*resume) (struct device *dev);
-	struct attribute_group **groups;
+	const struct attribute_group **groups;
 
 	const struct dev_pm_ops *pm;
 
@@ -288,7 +288,7 @@ extern void class_destroy(struct class *cls);
  */
 struct device_type {
 	const char *name;
-	struct attribute_group **groups;
+	const struct attribute_group **groups;
 	int (*uevent)(struct device *dev, struct kobj_uevent_env *env);
 	char *(*nodename)(struct device *dev);
 	void (*release)(struct device *dev);
@@ -412,7 +412,7 @@ struct device {
 
 	struct klist_node	knode_class;
 	struct class		*class;
-	struct attribute_group	**groups;	/* optional groups */
+	const struct attribute_group **groups;	/* optional groups */
 
 	void	(*release)(struct device *dev);
 };

include/linux/netdevice.h

@@ -895,7 +895,7 @@ struct net_device
 	/* class/net/name entry */
 	struct device		dev;
 	/* space for optional statistics and wireless sysfs groups */
-	struct attribute_group  *sysfs_groups[3];
+	const struct attribute_group *sysfs_groups[3];
 
 	/* rtnetlink link ops */
 	const struct rtnl_link_ops *rtnl_link_ops;

include/linux/transport_class.h

@@ -55,7 +55,7 @@ struct anon_transport_class cls = {				\
 
 struct transport_container {
 	struct attribute_container ac;
-	struct attribute_group *statistics;
+	const struct attribute_group *statistics;
 };
 
 #define attribute_container_to_transport_container(x) \