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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3551EC433EF for ; Thu, 21 Jul 2022 05:06:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229749AbiGUFGk (ORCPT ); Thu, 21 Jul 2022 01:06:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50224 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229441AbiGUFGi (ORCPT ); Thu, 21 Jul 2022 01:06:38 -0400 Received: from mga18.intel.com (mga18.intel.com [134.134.136.126]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E9E72774A8 for ; Wed, 20 Jul 2022 22:06:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1658379997; x=1689915997; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=YNolKkyK+U7u0xDQApTS59Z6cXU/e6kPR9y7JDD9VfI=; b=ELbxSZBQCpc2pouszWmyL6dNAYcBCd69/4PZsvXd++VqTXktjS++q9Cl sSSBAoQkhRVHtZ3EU/oG1zcBJEwDRZSa8ek7zuH8zQiq9J9Wpf18leJxB uP7EYgnO26okFG/cSe89FZn0A8bGeWb0QSXTJLpzfTuiPJ04gbBbdZ+dR RiIZL681EUA5myFI7JcB/QWRheiY/Xyjw2OnAiwZdZKA9e1seQSKl0EhS it2Llcj7pFyXlZdDTrIvHGVASpj5BcXH4OqZ1wGRwpWcsgRfzlVr0blyx yb7fcz9fss5W26ItE+2ihpDsiMCbax3mGgfkkTNABZa2myxogJgowbK1L g==; X-IronPort-AV: E=McAfee;i="6400,9594,10414"; a="269981699" X-IronPort-AV: E=Sophos;i="5.92,288,1650956400"; d="scan'208";a="269981699" Received: from orsmga007.jf.intel.com ([10.7.209.58]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Jul 2022 22:06:37 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.92,288,1650956400"; d="scan'208";a="595478665" Received: from lkp-server01.sh.intel.com (HELO 7dfbdc7c7900) ([10.239.97.150]) by orsmga007.jf.intel.com with ESMTP; 20 Jul 2022 22:06:35 -0700 Received: from kbuild by 7dfbdc7c7900 with local (Exim 4.95) (envelope-from ) id 1oEOOR-0001UH-8H; Thu, 21 Jul 2022 05:06:35 +0000 Date: Thu, 21 Jul 2022 13:06:33 +0800 From: kernel test robot To: Yu-Jen Chang , andy@kernel.org, akinobu.mita@gmail.com Cc: kbuild-all@lists.01.org, jserv@ccns.ncku.edu.tw, linux-kernel@vger.kernel.org, Yu-Jen Chang Subject: Re: [PATCH 2/2] lib/string.c: Optimize memchr() Message-ID: <202207211216.wsqhuMcj-lkp@intel.com> References: <20220710142822.52539-3-arthurchang09@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220710142822.52539-3-arthurchang09@gmail.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Yu-Jen, Thank you for the patch! Yet something to improve: [auto build test ERROR on linus/master] [also build test ERROR on v5.19-rc7 next-20220720] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Yu-Jen-Chang/Optimize-memchr/20220710-223118 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git b1c428b6c3684ee8ddf4137d68b3e8d51d2a700f config: arc-buildonly-randconfig-r005-20220719 (https://download.01.org/0day-ci/archive/20220721/202207211216.wsqhuMcj-lkp@intel.com/config) compiler: arceb-elf-gcc (GCC) 12.1.0 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 # https://github.com/intel-lab-lkp/linux/commit/307ee542c2bd8378b2225910f3f9b982df7a7669 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Yu-Jen-Chang/Optimize-memchr/20220710-223118 git checkout 307ee542c2bd8378b2225910f3f9b982df7a7669 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arc SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot All errors (new ones prefixed by >>): >> lib/string.c:902:7: error: conflicting types for 'memchr'; have 'void *(const void *, int, long unsigned int)' 902 | void *memchr(const void *p, int c, unsigned long length) | ^~~~~~ In file included from lib/string.c:19: include/linux/string.h:162:15: note: previous declaration of 'memchr' with type 'void *(const void *, int, __kernel_size_t)' {aka 'void *(const void *, int, unsigned int)'} 162 | extern void * memchr(const void *,int,__kernel_size_t); | ^~~~~~ vim +902 lib/string.c 891 892 #ifndef __HAVE_ARCH_MEMCHR 893 /** 894 * memchr - Find a character in an area of memory. 895 * @p: The memory area 896 * @c: The byte to search for 897 * @length: The size of the area. 898 * 899 * returns the address of the first occurrence of @c, or %NULL 900 * if @c is not found 901 */ > 902 void *memchr(const void *p, int c, unsigned long length) 903 { 904 u64 mask, val; 905 const void *end = p + length; 906 907 c &= 0xff; 908 if (p <= end - 8) { 909 mask = c; 910 MEMCHR_MASK_GEN(mask); 911 912 for (; p <= end - 8; p += 8) { 913 val = *(u64 *)p ^ mask; 914 if ((val + 0xfefefefefefefeffu) & 915 (~val & 0x8080808080808080u)) 916 break; 917 } 918 } 919 920 for (; p < end; p++) 921 if (*(unsigned char *)p == c) 922 return (void *)p; 923 924 return NULL; 925 } 926 EXPORT_SYMBOL(memchr); 927 #endif 928 -- 0-DAY CI Kernel Test Service https://01.org/lkp