diff --git a/arch/parisc/kernel/irq.c b/arch/parisc/kernel/irq.c
index 3998c0c..865611c 100644
--- a/arch/parisc/kernel/irq.c
+++ b/arch/parisc/kernel/irq.c
@@ -31,6 +31,8 @@
 #include <linux/spinlock.h>
 #include <linux/types.h>
 
+#include <asm/smp.h>
+
 #undef PARISC_IRQ_CR16_COUNTS
 
 extern irqreturn_t timer_interrupt(int, void *, struct pt_regs *);
diff --git a/include/asm-parisc/smp.h b/include/asm-parisc/smp.h
index a519195..dbdbd2e 100644
--- a/include/asm-parisc/smp.h
+++ b/include/asm-parisc/smp.h
@@ -54,7 +54,11 @@
 
 #define raw_smp_processor_id()	(current_thread_info()->cpu)
 
-#endif /* CONFIG_SMP */
+#else /* CONFIG_SMP */
+
+static inline void smp_send_all_nop(void) { return; }
+
+#endif
 
 #define NO_PROC_ID		0xFF		/* No processor magic marker */
 #define ANY_PROC_ID		0xFF		/* Any processor magic marker */