From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5B22B2C82 for ; Sat, 29 Jan 2022 16:11:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1643472682; x=1675008682; h=date:from:cc:subject:message-id:mime-version; bh=Vam+xzF8b0eUjkmZAxI9VEUITXI2zXjEdpBNsFjy+HI=; b=jpj41be9/rHkWOrsd/DconnGzNHA3fNuFz38+jvK/FEAIYvLFTUGhkve ESKjDwvwOj2MwHHZa5dBynPhqfUGIas2lSpVe7AOAltlc9Pg5G3+YHKoS YsKEE/9QEbu21XK9moO/ndeOkVjEqvhhMWI4yHEZGmjnCrLmc8InlNTHi RLFYIWzey1mB6JgZg42ACVGGZ/n35HB1lGRVgbGJ0T//zi8TKesjuqxOh G3EVg7tUmyUKOGSuuTx4lmr5WLtI1l1Zfq8eSSjFVT6TIza9lTnfaGCB9 9QQKRJa8cAWNAxVTFVl0OBnUVjy62QawweH1pKAAbiMDawDNkXd0H43Zt g==; X-IronPort-AV: E=McAfee;i="6200,9189,10242"; a="247051932" X-IronPort-AV: E=Sophos;i="5.88,326,1635231600"; d="scan'208";a="247051932" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Jan 2022 08:11:21 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.88,326,1635231600"; d="scan'208";a="481096928" Received: from lkp-server01.sh.intel.com (HELO 276f1b88eecb) ([10.239.97.150]) by orsmga006.jf.intel.com with ESMTP; 29 Jan 2022 08:11:20 -0800 Received: from kbuild by 276f1b88eecb with local (Exim 4.92) (envelope-from ) id 1nDqJr-000POA-OJ; Sat, 29 Jan 2022 16:11:19 +0000 Date: Sun, 30 Jan 2022 00:10:55 +0800 From: kernel test robot Cc: llvm@lists.linux.dev, kbuild-all@lists.01.org, linux-kernel@vger.kernel.org, Dmitry Torokhov Subject: drivers/input/touchscreen/ads7846.c:705:24: warning: taking address of packed member 'data' of class or structure 'ads7846_buf' may result in an unaligned pointer value Message-ID: <202201300020.SS6KSznh-lkp@intel.com> Precedence: bulk X-Mailing-List: llvm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.10.1 (2018-07-13) Hi Dmitry, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: cb323ee75d24e7acc2f188d123ba6df46159cf09 commit: 415e915fdfc775ad0c6675fde1008f6f43dd6251 Merge tag 'v5.11' into next date: 11 months ago config: mips-randconfig-r025-20220129 (https://download.01.org/0day-ci/archive/20220130/202201300020.SS6KSznh-lkp@intel.com/config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 33b45ee44b1f32ffdbc995e6fec806271b4b3ba4) 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 mips cross compiling tool for clang build # apt-get install binutils-mips-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=415e915fdfc775ad0c6675fde1008f6f43dd6251 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 415e915fdfc775ad0c6675fde1008f6f43dd6251 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash arch/mips/kernel/ drivers/input/touchscreen/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All warnings (new ones prefixed by >>): >> drivers/input/touchscreen/ads7846.c:705:24: warning: taking address of packed member 'data' of class or structure 'ads7846_buf' may result in an unaligned pointer value [-Waddress-of-packed-member] value = be16_to_cpup(&buf->data); ^~~~~~~~~ 1 warning generated. vim +705 drivers/input/touchscreen/ads7846.c 2991a1ca6e9b13 Jason Wang 2010-10-13 700 6965eece2a89c3 Oleksij Rempel 2021-01-20 701 static int ads7846_get_value(struct ads7846_buf *buf) 2991a1ca6e9b13 Jason Wang 2010-10-13 702 { 879f2fea8a5a74 Andrey Gelman 2015-10-06 703 int value; 2991a1ca6e9b13 Jason Wang 2010-10-13 704 6965eece2a89c3 Oleksij Rempel 2021-01-20 @705 value = be16_to_cpup(&buf->data); 879f2fea8a5a74 Andrey Gelman 2015-10-06 706 879f2fea8a5a74 Andrey Gelman 2015-10-06 707 /* enforce ADC output is 12 bits width */ 879f2fea8a5a74 Andrey Gelman 2015-10-06 708 return (value >> 3) & 0xfff; 2991a1ca6e9b13 Jason Wang 2010-10-13 709 } ffa458c1bd9b6f David Brownell 2006-01-08 710 :::::: The code at line 705 was first introduced by commit :::::: 6965eece2a89c3f1d00881c6052ee1e987870c08 Input: ads7846 - convert to one message :::::: TO: Oleksij Rempel :::::: CC: Dmitry Torokhov --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org