--- linux-2.6.0-test4/arch/ia64/kernel/smpboot.c.orig	2003-08-28 13:34:27.000000000 +1000
+++ linux-2.6.0-test4/arch/ia64/kernel/smpboot.c	2003-08-28 15:23:15.000000000 +1000
@@ -534,8 +534,8 @@
 		printk(KERN_INFO "SMP mode deactivated.\n");
 		cpus_clear(cpu_online_map);
 		cpus_clear(phys_cpu_present_map);
-		cpu_set(1, cpu_online_map);
-		cpu_set(1, phys_cpu_present_map);
+		cpu_set(0, cpu_online_map);
+		cpu_set(0, phys_cpu_present_map);
 		return;
 	}
 }