linux-kernel - [PATCH RFC 1/4] backlight: use static initializers

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Message-Id: <1410364463-12692-2-git-send-email-dh.herrmann@gmail.com>
Date:	Wed, 10 Sep 2014 17:54:20 +0200
From:	David Herrmann <dh.herrmann@...il.com>
To:	dri-devel@...ts.freedesktop.org
Cc:	Dave Airlie <airlied@...il.com>,
	Daniel Vetter <daniel.vetter@...ll.ch>,
	Jingoo Han <jg1.han@...sung.com>,
	Bryan Wu <cooloney@...il.com>,
	Lee Jones <lee.jones@...aro.org>,
	Matthew Garrett <matthew.garrett@...ula.com>,
	Adam Jackson <ajax@...hat.com>, linux-kernel@...r.kernel.org,
	David Herrmann <dh.herrmann@...il.com>
Subject: [PATCH RFC 1/4] backlight: use static initializers

Use static initializers instead of setting up global variables during
runtime. This reduces code size and execution time.

Signed-off-by: David Herrmann <dh.herrmann@...il.com>
---
 drivers/video/backlight/backlight.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c
index bddc8b1..726c6c6 100644
--- a/drivers/video/backlight/backlight.c
+++ b/drivers/video/backlight/backlight.c
@@ -21,9 +21,9 @@
 #include <asm/backlight.h>
 #endif
 
-static struct list_head backlight_dev_list;
-static struct mutex backlight_dev_list_mutex;
-static struct blocking_notifier_head backlight_notifier;
+static LIST_HEAD(backlight_dev_list);
+static DEFINE_MUTEX(backlight_dev_list_mutex);
+static BLOCKING_NOTIFIER_HEAD(backlight_notifier);
 
 static const char *const backlight_types[] = {
 	[BACKLIGHT_RAW] = "raw",
@@ -582,9 +582,6 @@ static int __init backlight_class_init(void)
 
 	backlight_class->dev_groups = bl_device_groups;
 	backlight_class->pm = &backlight_class_dev_pm_ops;
-	INIT_LIST_HEAD(&backlight_dev_list);
-	mutex_init(&backlight_dev_list_mutex);
-	BLOCKING_INIT_NOTIFIER_HEAD(&backlight_notifier);
 
 	return 0;
 }
-- 
2.1.0

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