Quite a few UP x86-64 laptops print APIC error 40's repeatedly
when they run an SMP kernel (And Fedora doesn't ship a UP x86-64 kernel
any more).  We can suppress this as there's not really anything we
can do about them.

--- linux-2.6.14/arch/x86_64/kernel/apic.c~	2005-12-07 15:17:33.000000000 -0500
+++ linux-2.6.14/arch/x86_64/kernel/apic.c	2005-12-07 15:18:16.000000000 -0500
@@ -1032,7 +1032,8 @@ asmlinkage void smp_error_interrupt(void
 	   6: Received illegal vector
 	   7: Illegal register address
 	*/
-	printk (KERN_DEBUG "APIC error on CPU%d: %02x(%02x)\n",
+	if (num_online_cpus() > 1)
+		printk (KERN_DEBUG "APIC error on CPU%d: %02x(%02x)\n",
 	        smp_processor_id(), v , v1);
 	irq_exit();
 }