From mboxrd@z Thu Jan 1 00:00:00 1970 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=-10.1 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 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 6C6A5C433DB for ; Wed, 24 Feb 2021 21:03:02 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 63A4A60202 for ; Wed, 24 Feb 2021 21:03:01 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 63A4A60202 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id AD9896B0005; 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s=merlin.20170209; h=Content-Transfer-Encoding:Content-Type: In-Reply-To:MIME-Version:Date:Message-ID:From:References:Cc:To:Subject:Sender :Reply-To:Content-ID:Content-Description; bh=WhViOo4bMhzCRGucQZfad8LzFD6uv/XnGokgXjpbUmg=; b=KKrHr0beROIrQYAnc6YXUPObhw /M4CzLe1kJrKfvX1rhNY27XEcRkNNx7xDYie5qeHesCryxWd8zIFOLTSb96vXY4MLwiz4o+/thhhU 8KFAdnRDzy9RsTUrrTWF6c3zJEGMIQGhUc5qX8bNLWEpzdZg477ryW15V3FN+HhzjpmLZno0BMzOm MsMI+JIsCVyAsXGA8U3mWSv05X3oxHjxCirsRo/EbpROfMI30B8HvgPx/xUm1V/SDU74XITzSCLXI 4zVl8Bu/Gl/G1ZLLu/oLUi8ZDyUeAnyTGXjFF0T6pn6MJcc1Z7uNDCJAYG0Ls/3Mjibz6X1JkQnet xhmHR+/g==; Received: from [2601:1c0:6280:3f0::d05b] by merlin.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1lF1JA-0008IL-48; Wed, 24 Feb 2021 21:02:56 +0000 Subject: Re: [linux-next:master 11942/12503] drivers/video/fbdev/aty/atyfb_base.c:180:6: warning: no previous prototype for function 'aty_st_lcd' To: Nick Desaulniers Cc: kernel test robot , kbuild-all@lists.01.org, clang-built-linux , Linux Memory Management List , Daniel Vetter References: <202102242016.MJskK6hp-lkp@intel.com> <97716bb9-6aca-d7e6-e390-1b9d3a0b99a8@infradead.org> From: Randy Dunlap Message-ID: <3628bb0f-0790-2a18-93e5-be244d32be53@infradead.org> Date: Wed, 24 Feb 2021 13:02:52 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.7.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Stat-Signature: zyd6z8ht178ko6c8swe6fwg3b3duy539 X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: D41DC90009F9 Received-SPF: none (infradead.org>: No applicable sender policy available) receiver=imf19; identity=mailfrom; envelope-from=""; helo=merlin.infradead.org; client-ip=205.233.59.134 X-HE-DKIM-Result: pass/pass X-HE-Tag: 1614200573-421404 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 2/24/21 12:42 PM, Nick Desaulniers wrote: > On Wed, Feb 24, 2021 at 12:03 PM Randy Dunlap wrote: >> >> On 2/24/21 4:46 AM, kernel test robot wrote: >>> Hi Randy, >>> >>> FYI, the error/warning still remains. >>> >>> tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master >>> head: 577c283560fe8a81a23a95654c6d13e8412d22f1 >>> commit: bfa5782b9caa26f93f42ad79804e1f75a1ce9f18 [11942/12503] fbdev: atyfb: add stubs for aty_{ld,st}_lcd() >>> config: arm64-randconfig-r004-20210223 (attached as .config) >>> compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project f14a14dd2564703db02f80c00db8ae492b594f77) >>> reproduce (this is a W=1 build): >>> wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross >>> chmod +x ~/bin/make.cross >>> # install arm64 cross compiling tool for clang build >>> # apt-get install binutils-aarch64-linux-gnu >>> # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=bfa5782b9caa26f93f42ad79804e1f75a1ce9f18 >>> git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git >>> git fetch --no-tags linux-next master >>> git checkout bfa5782b9caa26f93f42ad79804e1f75a1ce9f18 >>> # save the attached .config to linux build tree >>> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 >>> >>> If you fix the issue, kindly add following tag as appropriate >>> Reported-by: kernel test robot >>> >>> All warnings (new ones prefixed by >>): >>> >>>>> drivers/video/fbdev/aty/atyfb_base.c:180:6: warning: no previous prototype for function 'aty_st_lcd' [-Wmissing-prototypes] >>> void aty_st_lcd(int index, u32 val, const struct atyfb_par *par) >>> ^ >>> drivers/video/fbdev/aty/atyfb_base.c:180:1: note: declare 'static' if the function is not intended to be used outside of this translation unit >>> void aty_st_lcd(int index, u32 val, const struct atyfb_par *par) >>> ^ >>> static >>>>> drivers/video/fbdev/aty/atyfb_base.c:183:5: warning: no previous prototype for function 'aty_ld_lcd' [-Wmissing-prototypes] >>> u32 aty_ld_lcd(int index, const struct atyfb_par *par) >>> ^ >>> drivers/video/fbdev/aty/atyfb_base.c:183:1: note: declare 'static' if the function is not intended to be used outside of this translation unit >>> u32 aty_ld_lcd(int index, const struct atyfb_par *par) >>> ^ >>> static >>> 2 warnings generated. >>> >> >> These 2 functions are also used/usable (depending on CONFIG options) in >> mach64_ct.c so they can't be static. >> >> AFAIK, we don't make functions have different qualifiers depending on >> config options. > > Is there a shared header included by both mach64_ct.c and atyfb_base.c > you could provide a declaration in, that way should the definition > change we'd catch such a change in order to not break the callers? > atyfb.h: #if defined(CONFIG_PMAC_BACKLIGHT) || defined (CONFIG_FB_ATY_GENERIC_LCD) || \ defined (CONFIG_FB_ATY_BACKLIGHT) extern void aty_st_lcd(int index, u32 val, const struct atyfb_par *par); extern u32 aty_ld_lcd(int index, const struct atyfb_par *par); #endif so it's already there unless the .config did not include those #ifdef CONFIG_s. I'll recheck that. -- ~Randy