linux-kernel - [PATCH 2/3] video / backlight: remove the backlight_device

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Date:	Wed, 31 Dec 2014 11:50:17 +0800
From:	Aaron Lu <aaron.lu@...el.com>
To:	Jingoo Han <jg1.han@...sung.com>, Lee Jones <lee.jones@...aro.org>,
	Zhang Rui <rui.zhang@...el.com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>
Cc:	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-pm@...r.kernel.org
Subject: [PATCH 2/3] video / backlight: remove the backlight_device_registered API

Since we will need the backlight_device_get_by_type API, we can use it
instead of the backlight_device_registered API whenever necessary so
remove the backlight_device_registered API.

Signed-off-by: Aaron Lu <aaron.lu@...el.com>
---
 drivers/acpi/video.c                | 2 +-
 drivers/video/backlight/backlight.c | 6 ------
 include/linux/backlight.h           | 1 -
 3 files changed, 1 insertion(+), 8 deletions(-)

diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 1eaadff2e198..98d3f0de811e 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -246,7 +246,7 @@ static bool acpi_video_use_native_backlight(void)
 bool acpi_video_verify_backlight_support(void)
 {
 	if (acpi_osi_is_win8() && acpi_video_use_native_backlight() &&
-	    backlight_device_registered(BACKLIGHT_RAW))
+	    backlight_device_get_by_type(BACKLIGHT_RAW))
 		return false;
 	return acpi_video_backlight_support();
 }
diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c
index bea749329236..aec173d9e1ee 100644
--- a/drivers/video/backlight/backlight.c
+++ b/drivers/video/backlight/backlight.c
@@ -406,12 +406,6 @@ struct backlight_device *backlight_device_get_by_type(enum backlight_type type)
 }
 EXPORT_SYMBOL(backlight_device_get_by_type);
 
-bool backlight_device_registered(enum backlight_type type)
-{
-	return backlight_device_get_by_type(type) ? true : false;
-}
-EXPORT_SYMBOL(backlight_device_registered);
-
 /**
  * backlight_device_unregister - unregisters a backlight device object.
  * @bd: the backlight device object to be unregistered and freed.
diff --git a/include/linux/backlight.h b/include/linux/backlight.h
index c59a020df3f8..287a4460054c 100644
--- a/include/linux/backlight.h
+++ b/include/linux/backlight.h
@@ -137,7 +137,6 @@ extern void devm_backlight_device_unregister(struct device *dev,
 					struct backlight_device *bd);
 extern void backlight_force_update(struct backlight_device *bd,
 				   enum backlight_update_reason reason);
-extern bool backlight_device_registered(enum backlight_type type);
 extern int backlight_register_notifier(struct notifier_block *nb);
 extern int backlight_unregister_notifier(struct notifier_block *nb);
 extern struct backlight_device *backlight_device_get_by_type(enum backlight_type type);
-- 
2.1.0

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