diff -Nurp --exclude-from=/home/mcd/.dontdiff linux-2.6.4-vanilla/arch/i386/kernel/smpboot.c linux-2.6.4-valid_node_unmap/arch/i386/kernel/smpboot.c
--- linux-2.6.4-vanilla/arch/i386/kernel/smpboot.c	Wed Mar 10 18:55:27 2004
+++ linux-2.6.4-valid_node_unmap/arch/i386/kernel/smpboot.c	Mon Mar 15 13:59:49 2004
@@ -522,7 +522,7 @@ static inline void unmap_cpu_to_node(int
 	printk("Unmapping cpu %d from all nodes\n", cpu);
 	for (node = 0; node < MAX_NUMNODES; node ++)
 		cpu_clear(cpu, node_2_cpu_mask[node]);
-	cpu_2_node[cpu] = -1;
+	cpu_2_node[cpu] = 0;
 }
 #else /* !CONFIG_NUMA */