diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 829ac18b566c..5e37bf14ef2d 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -572,8 +572,8 @@ unsigned int irq_create_mapping(struct irq_host *host,
 }
 EXPORT_SYMBOL_GPL(irq_create_mapping);
 
-extern unsigned int irq_create_of_mapping(struct device_node *controller,
-					  u32 *intspec, unsigned int intsize)
+unsigned int irq_create_of_mapping(struct device_node *controller,
+				   u32 *intspec, unsigned int intsize)
 {
 	struct irq_host *host;
 	irq_hw_number_t hwirq;