From patchwork Wed May 12 09:02:47 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yang Li X-Patchwork-Id: 12253131 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,UNPARSEABLE_RELAY,USER_AGENT_GIT autolearn=ham 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 3AFC4C433B4 for ; Wed, 12 May 2021 09:02:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F2A6861419 for ; Wed, 12 May 2021 09:02:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230176AbhELJEA (ORCPT ); Wed, 12 May 2021 05:04:00 -0400 Received: from out30-133.freemail.mail.aliyun.com ([115.124.30.133]:56644 "EHLO out30-133.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230114AbhELJEA (ORCPT ); Wed, 12 May 2021 05:04:00 -0400 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R591e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04394;MF=yang.lee@linux.alibaba.com;NM=1;PH=DS;RN=8;SR=0;TI=SMTPD_---0UYdpVrJ_1620810169; Received: from j63c13417.sqa.eu95.tbsite.net(mailfrom:yang.lee@linux.alibaba.com fp:SMTPD_---0UYdpVrJ_1620810169) by smtp.aliyun-inc.com(127.0.0.1); Wed, 12 May 2021 17:02:50 +0800 From: Yang Li To: bernie@plugable.com Cc: nathan@kernel.org, ndesaulniers@google.com, linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, clang-built-linux@googlegroups.com, Yang Li Subject: [PATCH] video: fbdev: udlfb: Remove redundant initialization of Date: Wed, 12 May 2021 17:02:47 +0800 Message-Id: <1620810167-89132-1-git-send-email-yang.lee@linux.alibaba.com> X-Mailer: git-send-email 1.8.3.1 Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org Integer variable 'identical' is being initialized however this value is never read as 'identical' is assigned the result of 'start + (width - end)'. Remove the redundant assignment. At the same time, adjust the declarations order of variables to keep the "upside-down x-mas tree" look of them. Clean up clang warning: drivers/video/fbdev/udlfb.c:370:6: warning: Value stored to 'identical' during its initialization is never read [clang-analyzer-deadcode.DeadStores] Reported-by: Abaci Robot Signed-off-by: Yang Li --- drivers/video/fbdev/udlfb.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/video/fbdev/udlfb.c b/drivers/video/fbdev/udlfb.c index b9cdd02..f40dd6d8 100644 --- a/drivers/video/fbdev/udlfb.c +++ b/drivers/video/fbdev/udlfb.c @@ -363,13 +363,13 @@ static int dlfb_ops_mmap(struct fb_info *info, struct vm_area_struct *vma) */ static int dlfb_trim_hline(const u8 *bback, const u8 **bfront, int *width_bytes) { - int j, k; - const unsigned long *back = (const unsigned long *) bback; const unsigned long *front = (const unsigned long *) *bfront; + const unsigned long *back = (const unsigned long *) bback; const int width = *width_bytes / sizeof(unsigned long); - int identical = width; int start = width; int end = width; + int identical; + int j, k; for (j = 0; j < width; j++) { if (back[j] != front[j]) {