return 0;
 }
 
+#ifdef CONFIG_SMP
 /*
  * Migrate the IO-APIC irq in the presence of intr-remapping.
  *
        cpumask_copy(data->affinity, mask);
        return 0;
 }
+#endif
 
 static void intel_compose_msi_msg(struct pci_dev *pdev,
                                  unsigned int irq, unsigned int dest,
        .reenable               = reenable_irq_remapping,
        .enable_faulting        = enable_drhd_fault_handling,
        .setup_ioapic_entry     = intel_setup_ioapic_entry,
+#ifdef CONFIG_SMP
        .set_affinity           = intel_ioapic_set_affinity,
+#endif
        .free_irq               = free_irte,
        .compose_msi_msg        = intel_compose_msi_msg,
        .msi_alloc_irq          = intel_msi_alloc_irq,
 
                                             vector, attr);
 }
 
+#ifdef CONFIG_SMP
 int set_remapped_irq_affinity(struct irq_data *data, const struct cpumask *mask,
                              bool force)
 {
 
        return remap_ops->set_affinity(data, mask, force);
 }
+#endif
 
 void free_remapped_irq(int irq)
 {
 
                                  unsigned int, int,
                                  struct io_apic_irq_attr *);
 
+#ifdef CONFIG_SMP
        /* Set the CPU affinity of a remapped interrupt */
        int (*set_affinity)(struct irq_data *data, const struct cpumask *mask,
                            bool force);
+#endif
 
        /* Free an IRQ */
        int (*free_irq)(int);