Index: kernel/generic/include/mm/page.h
===================================================================
--- kernel/generic/include/mm/page.h	(revision ada559c5e94ba58f9ea3b263de2877127eba8873)
+++ kernel/generic/include/mm/page.h	(revision c263c77c4712f982349c184bbee4df2163f68baa)
@@ -38,5 +38,8 @@
 #include <typedefs.h>
 #include <mm/as.h>
-#include <memstr.h>
+#include <arch/mm/page.h>
+
+#define P2SZ(pages) \
+	((pages) << PAGE_WIDTH)	
 
 /** Operations to manipulate page mappings. */