diff -Nurp --exclude-from=/home/mcd/.dontdiff linux-2.6.4-pj_mask_v2/include/linux/cpumask.h linux-2.6.4-UP_online_map/include/linux/cpumask.h
--- linux-2.6.4-pj_mask_v2/include/linux/cpumask.h	Fri Apr  2 14:03:21 2004
+++ linux-2.6.4-UP_online_map/include/linux/cpumask.h	Fri Apr  2 14:13:54 2004
@@ -134,8 +134,12 @@ extern cpumask_t cpu_possible_map;
 
 #else /* !CONFIG_SMP */
 
-#define	cpu_online_map		     cpumask_of_cpu(0)
-#define	cpu_possible_map	     cpumask_of_cpu(0)
+#define	cpu_online_map				\
+({						\
+	cpumask_t m = MASK_ALL1(NR_CPUS);	\
+	m;					\
+})
+#define	cpu_possible_map	     cpu_online_map
 
 #define num_online_cpus()	     1
 #define num_possible_cpus()	     1