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 6F9A7C001DB for ; Fri, 11 Aug 2023 13:28:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235473AbjHKN2u (ORCPT ); Fri, 11 Aug 2023 09:28:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46240 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230486AbjHKN2q (ORCPT ); Fri, 11 Aug 2023 09:28:46 -0400 Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.93]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1034690; Fri, 11 Aug 2023 06:28:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1691760526; x=1723296526; h=date:from:to:cc:subject:message-id:references: mime-version:content-transfer-encoding:in-reply-to; bh=NbxrrXvoiSicJd1C4RwRcvJ2E3Rl98Kr2w0LNsNE+g8=; b=dV/8THL08tgrnGu0xeZ06XzvraKbd8PVUFAtLgY033sn32oI/fK3thEn hG+hUZAYr2zH2UKOk7r4PnqwJQQexLSu0JS3am8KzXMhsHd3OSXVkCNHI GM36NqKd/AYjzSwSWZ9rpqibxKTlZX/CGVUHufBVX0RZyA9bOCjfMy+cA uqd75OGstzgXC3N4BDUg6+ymWY50Qbwp0y2reU3lxSruBjW2GlDFmOFsQ i8C1tnShXMywjOOZj1ZbiOs49xwFp5DOHOpq/qtnJ/OBwk4m8p/2H6J7O e4o2FwXSfK2A8OT35cpe9EizpFN8HurngT+LPxjg0+m4Hec2cGbyT9JIf Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10798"; a="369147251" X-IronPort-AV: E=Sophos;i="6.01,165,1684825200"; d="scan'208";a="369147251" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Aug 2023 06:28:45 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10798"; a="846804187" X-IronPort-AV: E=Sophos;i="6.01,165,1684825200"; d="scan'208";a="846804187" Received: from lkp-server01.sh.intel.com (HELO d1ccc7e87e8f) ([10.239.97.150]) by fmsmga002.fm.intel.com with ESMTP; 11 Aug 2023 06:28:43 -0700 Received: from kbuild by d1ccc7e87e8f with local (Exim 4.96) (envelope-from ) id 1qUSC2-0007oa-1W; Fri, 11 Aug 2023 13:28:42 +0000 Date: Fri, 11 Aug 2023 21:28:13 +0800 From: kernel test robot To: Li kunyu , tj@kernel.org, lizefan.x@bytedance.com, hannes@cmpxchg.org Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev, cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, Li kunyu Subject: Re: [PATCH] cgroup: cgroup: =?utf-8?Q?Remo?= =?utf-8?B?dmUgdW5uZWNlc3Nhcnkg4oCYMOKAmQ==?= values from ret Message-ID: <202308112139.lVjuXYZg-lkp@intel.com> References: <20230813014734.2916-1-kunyu@nfschina.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20230813014734.2916-1-kunyu@nfschina.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Li, kernel test robot noticed the following build warnings: [auto build test WARNING on v6.5-rc5] [also build test WARNING on linus/master next-20230809] [cannot apply to tj-cgroup/for-next] [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/Li-kunyu/cgroup-cgroup-Remove-unnecessary-0-values-from-ret/20230811-171814 base: v6.5-rc5 patch link: https://lore.kernel.org/r/20230813014734.2916-1-kunyu%40nfschina.com patch subject: [PATCH] cgroup: cgroup: Remove unnecessary ‘0’ values from ret config: x86_64-randconfig-r035-20230811 (https://download.01.org/0day-ci/archive/20230811/202308112139.lVjuXYZg-lkp@intel.com/config) compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07) reproduce: (https://download.01.org/0day-ci/archive/20230811/202308112139.lVjuXYZg-lkp@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-kbuild-all/202308112139.lVjuXYZg-lkp@intel.com/ All warnings (new ones prefixed by >>): >> kernel/cgroup/cgroup.c:7000:56: warning: variable 'ret' is uninitialized when used here [-Wuninitialized] ret = show_delegatable_files(cgroup_base_files, buf + ret, ^~~ kernel/cgroup/cgroup.c:6998:13: note: initialize the variable 'ret' to silence this warning ssize_t ret; ^ = 0 1 warning generated. vim +/ret +7000 kernel/cgroup/cgroup.c 01ee6cfb1483fe Roman Gushchin 2017-11-06 6992 01ee6cfb1483fe Roman Gushchin 2017-11-06 6993 static ssize_t delegate_show(struct kobject *kobj, struct kobj_attribute *attr, 01ee6cfb1483fe Roman Gushchin 2017-11-06 6994 char *buf) 01ee6cfb1483fe Roman Gushchin 2017-11-06 6995 { 01ee6cfb1483fe Roman Gushchin 2017-11-06 6996 struct cgroup_subsys *ss; 01ee6cfb1483fe Roman Gushchin 2017-11-06 6997 int ssid; 3d7f13682faf54 Li kunyu 2023-08-13 6998 ssize_t ret; 01ee6cfb1483fe Roman Gushchin 2017-11-06 6999 8a693f7766f9e2 Tejun Heo 2022-09-06 @7000 ret = show_delegatable_files(cgroup_base_files, buf + ret, 8a693f7766f9e2 Tejun Heo 2022-09-06 7001 PAGE_SIZE - ret, NULL); 8a693f7766f9e2 Tejun Heo 2022-09-06 7002 if (cgroup_psi_enabled()) 8a693f7766f9e2 Tejun Heo 2022-09-06 7003 ret += show_delegatable_files(cgroup_psi_files, buf + ret, 8a693f7766f9e2 Tejun Heo 2022-09-06 7004 PAGE_SIZE - ret, NULL); 01ee6cfb1483fe Roman Gushchin 2017-11-06 7005 01ee6cfb1483fe Roman Gushchin 2017-11-06 7006 for_each_subsys(ss, ssid) 01ee6cfb1483fe Roman Gushchin 2017-11-06 7007 ret += show_delegatable_files(ss->dfl_cftypes, buf + ret, 01ee6cfb1483fe Roman Gushchin 2017-11-06 7008 PAGE_SIZE - ret, 01ee6cfb1483fe Roman Gushchin 2017-11-06 7009 cgroup_subsys_name[ssid]); 01ee6cfb1483fe Roman Gushchin 2017-11-06 7010 01ee6cfb1483fe Roman Gushchin 2017-11-06 7011 return ret; 01ee6cfb1483fe Roman Gushchin 2017-11-06 7012 } 01ee6cfb1483fe Roman Gushchin 2017-11-06 7013 static struct kobj_attribute cgroup_delegate_attr = __ATTR_RO(delegate); 01ee6cfb1483fe Roman Gushchin 2017-11-06 7014 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki