diff -ru a/arch/ia64/kernel/efi.c b/arch/ia64/kernel/efi.c
--- a/arch/ia64/kernel/efi.c	Wed Aug 27 15:49:27 2003
+++ b/arch/ia64/kernel/efi.c	Wed Aug 27 16:47:27 2003
@@ -324,7 +324,7 @@
 				check_md = q;
 
 				if (check_md->attribute & EFI_MEMORY_WB)
-					trim_bottom(md, granule_addr);
+					trim_bottom(check_md, granule_addr);
 
 				if (check_md->phys_addr < granule_addr)
 					continue;