diff -urN drm.org/drmP.h drm/drmP.h
--- drm.org/drmP.h	Sun May 26 10:07:41 2002
+++ drm/drmP.h	Sun May 26 10:52:19 2002
@@ -32,6 +32,8 @@
 #ifndef _DRM_P_H_
 #define _DRM_P_H_
 
+#define CONFIG_X86_CMPXCHG 1
+
 #ifdef __KERNEL__
 #ifdef __alpha__
 /* add include of current.h so that "current" is defined