diff --git a/drivers/amba/bus.c b/drivers/amba/bus.c
index e7df019..ca96b0a 100644
--- a/drivers/amba/bus.c
+++ b/drivers/amba/bus.c
@@ -106,7 +106,7 @@
  * Primecells are part of the Advanced Microcontroller Bus Architecture,
  * so we call the bus "amba".
  */
-static struct bus_type amba_bustype = {
+struct bus_type amba_bustype = {
 	.name		= "amba",
 	.dev_attrs	= amba_dev_attrs,
 	.match		= amba_match,
diff --git a/include/linux/amba/bus.h b/include/linux/amba/bus.h
index 9e7f259..a0ccf28 100644
--- a/include/linux/amba/bus.h
+++ b/include/linux/amba/bus.h
@@ -56,6 +56,8 @@
 	AMBA_VENDOR_ST = 0x80,
 };
 
+extern struct bus_type amba_bustype;
+
 #define amba_get_drvdata(d)	dev_get_drvdata(&d->dev)
 #define amba_set_drvdata(d,p)	dev_set_drvdata(&d->dev, p)