Index: arch/ia64/include/context.h
===================================================================
--- arch/ia64/include/context.h	(revision 244f2842214f05788f7dcb3885f53a6a89cb90bb)
+++ arch/ia64/include/context.h	(revision 7f1bfceb9210d208482652a9028d8dc7c11acd79)
@@ -31,4 +31,6 @@
 
 #include <arch/types.h>
+
+#define SP_DELTA	16
 
 struct context {