Index: linux-2.6/drivers/w1/w1.c
===================================================================
--- linux-2.6.orig/drivers/w1/w1.c	2006-12-14 17:47:27.000000000 +0100
+++ linux-2.6/drivers/w1/w1.c	2006-12-14 17:50:39.000000000 +0100
@@ -195,7 +195,7 @@
 
 static int w1_uevent(struct device *dev, char **envp, int num_envp, char *buffer, int buffer_size);
 
-static struct bus_type w1_bus_type = {
+struct bus_type w1_bus_type = {
 	.name = "w1",
 	.match = w1_master_match,
 	.uevent = w1_uevent,
@@ -979,3 +979,5 @@
 
 module_init(w1_init);
 module_exit(w1_fini);
+
+EXPORT_SYMBOL_GPL(w1_bus_type);
Index: linux-2.6/drivers/w1/w1.h
===================================================================
--- linux-2.6.orig/drivers/w1/w1.h	2006-12-14 17:47:27.000000000 +0100
+++ linux-2.6/drivers/w1/w1.h	2006-12-14 17:50:39.000000000 +0100
@@ -210,6 +210,7 @@
 	return container_of(dev, struct w1_master, dev);
 }
 
+extern struct bus_type w1_bus_type;
 extern struct device_driver w1_master_driver;
 extern struct device w1_master_device;
 extern int w1_max_slave_count;