diff -urpN -X /home/fletch/.diff.exclude 114-sched_tunables/arch/i386/kernel/irq.c 120-irq_affinity/arch/i386/kernel/irq.c
--- 114-sched_tunables/arch/i386/kernel/irq.c	Tue Sep  2 09:55:42 2003
+++ 120-irq_affinity/arch/i386/kernel/irq.c	Tue Sep  2 10:13:07 2003
@@ -976,9 +976,10 @@ static int irq_affinity_write_proc(struc
 		return -EINVAL;
 
 	irq_affinity[irq] = new_value;
+#ifndef CONFIG_X86_SUMMIT
 	irq_desc[irq].handler->set_affinity(irq,
 					cpumask_of_cpu(first_cpu(new_value)));
-
+#endif
 	return full_count;
 }