From patchwork Mon Apr 5 10:14:40 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zheng Yongjun X-Patchwork-Id: 415456 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4A973C433B4 for ; Mon, 5 Apr 2021 10:00:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 191D761278 for ; Mon, 5 Apr 2021 10:00:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240497AbhDEKAr (ORCPT ); Mon, 5 Apr 2021 06:00:47 -0400 Received: from szxga04-in.huawei.com ([45.249.212.190]:14689 "EHLO szxga04-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232063AbhDEKAq (ORCPT ); Mon, 5 Apr 2021 06:00:46 -0400 Received: from DGGEMS411-HUB.china.huawei.com (unknown [172.30.72.60]) by szxga04-in.huawei.com (SkyGuard) with ESMTP id 4FDR0z32CGznYlh; Mon, 5 Apr 2021 17:57:55 +0800 (CST) Received: from localhost.localdomain (10.175.104.82) by DGGEMS411-HUB.china.huawei.com (10.3.19.211) with Microsoft SMTP Server id 14.3.498.0; Mon, 5 Apr 2021 18:00:31 +0800 From: Zheng Yongjun To: , Lee Jones , "Daniel Thompson" , Jingoo Han CC: , , , Hulk Robot Subject: [PATCH -next] backlight: backlight: Use DEFINE_MUTEX() for mutex lock Date: Mon, 5 Apr 2021 18:14:40 +0800 Message-ID: <20210405101440.14937-1-zhengyongjun3@huawei.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-Originating-IP: [10.175.104.82] X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org mutex lock can be initialized automatically with DEFINE_MUTEX() rather than explicitly calling mutex_init(). Reported-by: Hulk Robot Signed-off-by: Zheng Yongjun --- 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;