Index: vanilla-2.6.17-rc3-mm1/arch/i386/kernel/alternative.c
===================================================================
--- vanilla-2.6.17-rc3-mm1.orig/arch/i386/kernel/alternative.c	2006-05-10 12:25:39.000000000 +0200
+++ vanilla-2.6.17-rc3-mm1/arch/i386/kernel/alternative.c	2006-05-10 15:00:10.000000000 +0200
@@ -349,6 +349,9 @@ void __init alternative_instructions(voi
 	smp_alt_once = 1;
 #endif
 
+	if (0 == (__smp_alt_end - __smp_alt_begin))
+		return; /* no tables, nothing to patch (UP kernel) */
+
 	if (smp_alt_once) {
 		if (1 == num_possible_cpus()) {
 			printk(KERN_INFO "SMP alternatives: switching to UP code\n");