diff --git a/drivers/misc/sgi-xp/xp.h b/drivers/misc/sgi-xp/xp.h
index 03a87a307e321f0ac2ae3dffd2a16cef7baa03f5..83627eac4128d7b39a23bda565750332ad5fce06 100644
--- a/drivers/misc/sgi-xp/xp.h
+++ b/drivers/misc/sgi-xp/xp.h
@@ -25,6 +25,22 @@
 #define DBUG_ON(condition)
 #endif
 
+#ifndef is_shub1
+#define is_shub1()	0
+#endif
+
+#ifndef is_shub2
+#define is_shub2()	0
+#endif
+
+#ifndef is_shub
+#define is_shub()	(is_shub1() || is_shub2())
+#endif
+
+#ifndef is_uv
+#define is_uv()		0
+#endif
+
 /*
  * Define the maximum number of logically defined partitions the system
  * can support. It is constrained by the maximum number of hardware