diff --git a/arch/sh/include/asm/gpio.h b/arch/sh/include/asm/gpio.h
index f8d9a731e903..04f53d31489f 100644
--- a/arch/sh/include/asm/gpio.h
+++ b/arch/sh/include/asm/gpio.h
@@ -41,14 +41,12 @@ static inline int gpio_cansleep(unsigned gpio)
 
 static inline int gpio_to_irq(unsigned gpio)
 {
-	WARN_ON(1);
-	return -ENOSYS;
+	return __gpio_to_irq(gpio);
 }
 
 static inline int irq_to_gpio(unsigned int irq)
 {
-	WARN_ON(1);
-	return -EINVAL;
+	return -ENOSYS;
 }
 
 #endif /* CONFIG_GPIOLIB */