Index: powerpc/drivers/base/memory.c
===================================================================
--- powerpc.orig/drivers/base/memory.c	2009-09-15 14:52:12.000000000 -0500
+++ powerpc/drivers/base/memory.c	2009-09-15 14:53:32.000000000 -0500
@@ -28,9 +28,10 @@
 
 #define MEMORY_CLASS_NAME	"memory"
 
-static struct sysdev_class memory_sysdev_class = {
+struct sysdev_class memory_sysdev_class = {
 	.name = MEMORY_CLASS_NAME,
 };
+EXPORT_SYMBOL(memory_sysdev_class);
 
 static const char *memory_uevent_name(struct kset *kset, struct kobject *kobj)
 {
Index: powerpc/include/linux/memory_hotplug.h
===================================================================
--- powerpc.orig/include/linux/memory_hotplug.h	2009-09-15 14:52:12.000000000 -0500
+++ powerpc/include/linux/memory_hotplug.h	2009-09-15 14:53:32.000000000 -0500
@@ -12,6 +12,8 @@
 
 #ifdef CONFIG_MEMORY_HOTPLUG
 
+extern struct sysdev_class memory_sysdev_class;
+
 /*
  * Types for free bootmem.
  * The normal smallest mapcount is -1. Here is smaller value than it.