From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.120]) (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 889277ED for ; Mon, 28 Aug 2023 05:20:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1693200015; x=1724736015; h=date:from:to:cc:subject:message-id:references: mime-version:content-transfer-encoding:in-reply-to; bh=ZIFzK/X1nhD6KUrdCwhykqKym1A1teP2AZ/Vewk+W1E=; b=hmE3B7YLq7WnuAORhddQLwbPUKAgVmguxNK67r7TGXYZERKi/NCEMhTY J1f7Z8/23GSDYp3sWfOvtkDc1fEeROqFi+l3CfqL0z7vB4qLIqvo2BfLh SO7u0TKqEyeME1kzuAl8BKZHRNg427iHWGf9dpLRkD7JZggtCfxGrEPK0 OY/6yJIFdGL6ZIDVup71FlcigVL2xWa5yZRM97oYHdBJTDgR4ZxdHTlds EEp5v1g49WeHefCQjC2a/MxhVDfq5an8mTDdxQM6EGv5trGXtM8BUjvGB S4oTA4wpB18w1qDcCqxXrnZulGzym28ZKdx1D+mxJwfetzhCPXu5wRuc5 g==; X-IronPort-AV: E=McAfee;i="6600,9927,10815"; a="373903098" X-IronPort-AV: E=Sophos;i="6.02,206,1688454000"; d="scan'208";a="373903098" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Aug 2023 22:20:14 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.01,202,1684825200"; d="scan'208";a="881790891" Received: from lkp-server02.sh.intel.com (HELO daf8bb0a381d) ([10.239.97.151]) by fmsmga001.fm.intel.com with ESMTP; 27 Aug 2023 22:20:17 -0700 Received: from kbuild by daf8bb0a381d with local (Exim 4.96) (envelope-from ) id 1qaUfI-0007ab-10; Mon, 28 Aug 2023 05:19:53 +0000 Date: Mon, 28 Aug 2023 13:19:19 +0800 From: kernel test robot To: Li zeming , tj@kernel.org, jiangshanlai@gmail.com Cc: oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org, Li zeming Subject: Re: [PATCH] kernel/workqueue: =?utf-8?Q?Re?= =?utf-8?B?bW92ZSB1bm5lY2Vzc2FyeSDigJgw4oCZ?= values from hash Message-ID: <202308281313.YHarxg3i-lkp@intel.com> References: <20230829181755.3204-1-zeming@nfschina.com> Precedence: bulk X-Mailing-List: oe-kbuild-all@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20230829181755.3204-1-zeming@nfschina.com> Hi Li, kernel test robot noticed the following build warnings: [auto build test WARNING on tj-wq/for-next] [also build test WARNING on linus/master v6.5 next-20230825] [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-zeming/kernel-workqueue-Remove-unnecessary-0-values-from-hash/20230828-095048 base: https://git.kernel.org/pub/scm/linux/kernel/git/tj/wq.git for-next patch link: https://lore.kernel.org/r/20230829181755.3204-1-zeming%40nfschina.com patch subject: [PATCH] kernel/workqueue: Remove unnecessary ‘0’ values from hash config: um-i386_defconfig (https://download.01.org/0day-ci/archive/20230828/202308281313.YHarxg3i-lkp@intel.com/config) compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0 reproduce: (https://download.01.org/0day-ci/archive/20230828/202308281313.YHarxg3i-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/202308281313.YHarxg3i-lkp@intel.com/ All warnings (new ones prefixed by >>): kernel/workqueue.c: In function 'wqattrs_hash': >> kernel/workqueue.c:3777:7: warning: 'hash' is used uninitialized in this function [-Wuninitialized] hash = jhash_1word(attrs->nice, hash); ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +/hash +3777 kernel/workqueue.c 5de7a03cac1476 Tejun Heo 2023-08-07 3771 6ba94429c8e7b8 Frederic Weisbecker 2015-04-02 3772 /* hash value of the content of @attr */ 6ba94429c8e7b8 Frederic Weisbecker 2015-04-02 3773 static u32 wqattrs_hash(const struct workqueue_attrs *attrs) 226223ab3c4118 Tejun Heo 2013-03-12 3774 { dd46423224bbdf Li zeming 2023-08-30 3775 u32 hash; 226223ab3c4118 Tejun Heo 2013-03-12 3776 6ba94429c8e7b8 Frederic Weisbecker 2015-04-02 @3777 hash = jhash_1word(attrs->nice, hash); 6ba94429c8e7b8 Frederic Weisbecker 2015-04-02 3778 hash = jhash(cpumask_bits(attrs->cpumask), 6ba94429c8e7b8 Frederic Weisbecker 2015-04-02 3779 BITS_TO_LONGS(nr_cpumask_bits) * sizeof(long), hash); 9546b29e4a6ad6 Tejun Heo 2023-08-07 3780 hash = jhash(cpumask_bits(attrs->__pod_cpumask), 9546b29e4a6ad6 Tejun Heo 2023-08-07 3781 BITS_TO_LONGS(nr_cpumask_bits) * sizeof(long), hash); 8639ecebc9b179 Tejun Heo 2023-08-07 3782 hash = jhash_1word(attrs->affn_strict, hash); 6ba94429c8e7b8 Frederic Weisbecker 2015-04-02 3783 return hash; d55262c4d16475 Tejun Heo 2013-04-01 3784 } 226223ab3c4118 Tejun Heo 2013-03-12 3785 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki