[PATCH v7 1/3] backlight: Add IS_ENABLED(CONFIG_BACKLIGHT_CLASS_DEVICE)

[Meghana Madhyastha]

Add IS_ENABLED(CONFIG_BACKLIGHT_CLASS_DEVICE) as part of the
if directive for the function declaration of
of_find_backlight_by_node in order to avoid module dependency
errors.

Signed-off-by: Meghana Madhyastha <meghana.madhyastha at gmail.com>
---
Changes in v7:
-This patch did not exist in v6. 

 include/linux/backlight.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/backlight.h b/include/linux/backlight.h
index 5f2fd61..a52ce82 100644
--- a/include/linux/backlight.h
+++ b/include/linux/backlight.h
@@ -162,7 +162,7 @@ struct generic_bl_info {
 	void (*kick_battery)(void);
 };
 
-#ifdef CONFIG_OF
+#if defined CONFIG_OF && IS_ENABLED(CONFIG_BACKLIGHT_CLASS_DEVICE)
 struct backlight_device *of_find_backlight_by_node(struct device_node *node);
 #else
 static inline struct backlight_device *
-- 
2.7.4