driver core: Export the legacy_bus structure for drivers to use.

drivers/base/platform.c

@@ -9,7 +9,7 @@
 #include <linux/module.h>
 #include <linux/init.h>
 
-static struct device legacy_bus = {
+struct device legacy_bus = {
 	.name		= "legacy bus",
 	.bus_id		= "legacy",
 };
@@ -75,5 +75,6 @@ int __init platform_bus_init(void)
 	return bus_register(&platform_bus_type);
 }
 
+EXPORT_SYMBOL(legacy_bus);
 EXPORT_SYMBOL(platform_device_register);
 EXPORT_SYMBOL(platform_device_unregister);

include/linux/device.h

@@ -366,6 +366,7 @@ extern int platform_device_register(struct platform_device *);
 extern void platform_device_unregister(struct platform_device *);
 
 extern struct bus_type platform_bus_type;
+extern struct device legacy_bus;
 
 /* drivers/base/power.c */
 extern int device_suspend(u32 state, u32 level);