diff --git a/arch/powerpc/include/asm/ps3.h b/arch/powerpc/include/asm/ps3.h
index 8a0d8fb35328..d503dbd7856c 100644
--- a/arch/powerpc/include/asm/ps3.h
+++ b/arch/powerpc/include/asm/ps3.h
@@ -425,10 +425,6 @@ static inline void *ps3_system_bus_get_drvdata(
 	return dev_get_drvdata(&dev->core);
 }
 
-/* These two need global scope for get_arch_dma_ops(). */
-
-extern struct bus_type ps3_system_bus_type;
-
 /* system manager */
 
 struct ps3_sys_manager_ops {
diff --git a/arch/powerpc/platforms/ps3/system-bus.c b/arch/powerpc/platforms/ps3/system-bus.c
index 2502e9b17df4..38a7e02295c8 100644
--- a/arch/powerpc/platforms/ps3/system-bus.c
+++ b/arch/powerpc/platforms/ps3/system-bus.c
@@ -466,7 +466,7 @@ static struct attribute *ps3_system_bus_dev_attrs[] = {
 };
 ATTRIBUTE_GROUPS(ps3_system_bus_dev);
 
-struct bus_type ps3_system_bus_type = {
+static struct bus_type ps3_system_bus_type = {
 	.name = "ps3_system_bus",
 	.match = ps3_system_bus_match,
 	.uevent = ps3_system_bus_uevent,