linux-kernel - [PATCH v2 -next] video: backlight: use DEFINE

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Message-ID: <20201224132601.31791-1-zhengyongjun3@huawei.com>
Date:   Thu, 24 Dec 2020 21:26:01 +0800
From:   Zheng Yongjun <zhengyongjun3@...wei.com>
To:     <lee.jones@...aro.org>, <daniel.thompson@...aro.org>,
        <jingoohan1@...il.com>, <b.zolnierkie@...sung.com>,
        <dri-devel@...ts.freedesktop.org>, <linux-fbdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
CC:     Zheng Yongjun <zhengyongjun3@...wei.com>
Subject: [PATCH v2 -next] video: backlight: use DEFINE_MUTEX() for mutex lock

mutex lock can be initialized automatically with DEFINE_MUTEX()
rather than explicitly calling mutex_init().

Signed-off-by: Zheng Yongjun <zhengyongjun3@...wei.com>
---
 drivers/video/backlight/backlight.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c
index 537fe1b376ad..d7a09c422547 100644
--- a/drivers/video/backlight/backlight.c
+++ b/drivers/video/backlight/backlight.c
@@ -64,7 +64,7 @@
  */
 
 static struct list_head backlight_dev_list;
-static struct mutex backlight_dev_list_mutex;
+static DEFINE_MUTEX(backlight_dev_list_mutex);
 static struct blocking_notifier_head backlight_notifier;
 
 static const char *const backlight_types[] = {
@@ -757,7 +757,6 @@ 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;
-- 
2.22.0