--- linux-2.6.26.5/include/asm-powerpc/processor.h	2008-09-08 13:40:20.000000000 -0400
+++ linux-2.6.26.5-rb600/include/asm-powerpc/processor.h	2008-09-20 23:51:05.064626576 -0400
@@ -148,7 +148,7 @@ struct thread_struct {
 #ifdef CONFIG_PPC32
 	void		*pgdir;		/* root of page-table tree */
 #endif
-#if defined(CONFIG_4xx) || defined (CONFIG_BOOKE)
+#if defined(CONFIG_4xx) || defined (CONFIG_BOOKE) || defined(CONFIG_RB_PPC)
 	unsigned long	dbcr0;		/* debug control register values */
 	unsigned long	dbcr1;
 #endif