Index: linux-2.6.22-rc2/include/asm-ia64/sparsemem.h
===================================================================
--- linux-2.6.22-rc2.orig/include/asm-ia64/sparsemem.h	2007-05-22 22:51:13.000000000 -0700
+++ linux-2.6.22-rc2/include/asm-ia64/sparsemem.h	2007-05-22 22:51:18.000000000 -0700
@@ -8,7 +8,7 @@
  */
 
 #define SECTION_SIZE_BITS	(30)
-#define MAX_PHYSMEM_BITS	(53)
+#define MAX_PHYSMEM_BITS	(50)
 #ifdef CONFIG_FORCE_MAX_ZONEORDER
 #if ((CONFIG_FORCE_MAX_ZONEORDER - 1 + PAGE_SHIFT) > SECTION_SIZE_BITS)
 #undef SECTION_SIZE_BITS