Index: linux-2.6.21-mm1/init/Kconfig
===================================================================
--- linux-2.6.21-mm1.orig/init/Kconfig	2007-05-08 18:39:04.000000000 -0700
+++ linux-2.6.21-mm1/init/Kconfig	2007-05-08 18:41:20.000000000 -0700
@@ -590,7 +590,6 @@ config SLAB
 	  a slab allocator.
 
 config SLUB
-	depends on !ARCH_USES_SLAB_PAGE_STRUCT
 	bool "SLUB (Unqueued Allocator)"
 	help
 	   SLUB is a slab allocator that minimizes cache line usage