diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 42c8ed6..c2b84c6 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -412,6 +412,12 @@
 static unsigned int irq_virq_count = NR_IRQS;
 static struct irq_host *irq_default_host;
 
+irq_hw_number_t virq_to_hw(unsigned int virq)
+{
+	return irq_map[virq].hwirq;
+}
+EXPORT_SYMBOL_GPL(virq_to_hw);
+
 struct irq_host *irq_alloc_host(unsigned int revmap_type,
 				unsigned int revmap_arg,
 				struct irq_host_ops *ops,