diff --git a/include/linux/irqnr.h b/include/linux/irqnr.h
index 5504a5c97836..86af92e9e84c 100644
--- a/include/linux/irqnr.h
+++ b/include/linux/irqnr.h
@@ -8,7 +8,12 @@
 
 #ifndef CONFIG_GENERIC_HARDIRQS
 #include <asm/irq.h>
-# define nr_irqs		NR_IRQS
+
+/*
+ * Wrappers for non-genirq architectures:
+ */
+#define nr_irqs			NR_IRQS
+#define irq_to_desc(irq)	(&irq_desc[irq])
 
 # define for_each_irq_desc(irq, desc)		\
 	for (irq = 0; irq < nr_irqs; irq++)