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 AD660C433EF for ; Mon, 10 Jan 2022 12:23:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S245364AbiAJMXG (ORCPT ); Mon, 10 Jan 2022 07:23:06 -0500 Received: from mga04.intel.com ([192.55.52.120]:45866 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245353AbiAJMWw (ORCPT ); Mon, 10 Jan 2022 07:22:52 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1641817372; x=1673353372; h=date:from:to:cc:subject:message-id:mime-version; bh=gmL3tKEUDF2ZwVHFtsNVYcZn2op8HEU3muwCY7UW7MI=; b=kgQWlMj0ktvyzG1cepOQZiNBRAlxy1oi7uhc81GY8Ljs5b73KECPdhGv asWxIWnTzfVYVICEAwg3KK18MvBRuByCCY6dSGxBShnE/1d0zC3ipc7nT pXkDveB3h5oeEStMzyNmUvIIBdgoq5T3w//pyn0b0QWEjdhyrDmRDMEc9 xVP4tipvl2zukm/aisjO4vhu7LbUevLl3VVWSjEzysNnKbKwznjwbYsJR 1AhJQ6h9zB6gcE4buBot1R06hibaiol4IYYlDD3xmSIu5hP4tdjfUVAGe 1favtSJhEiSVzC2vMs7VYtY7bGj1P20RwDih8NsAjkqZ+7MIZqHg3wi2y g==; X-IronPort-AV: E=McAfee;i="6200,9189,10222"; a="242025013" X-IronPort-AV: E=Sophos;i="5.88,277,1635231600"; d="scan'208";a="242025013" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Jan 2022 04:21:48 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.88,277,1635231600"; d="scan'208";a="669436824" Received: from lkp-server01.sh.intel.com (HELO 276f1b88eecb) ([10.239.97.150]) by fmsmga001.fm.intel.com with ESMTP; 10 Jan 2022 04:21:46 -0800 Received: from kbuild by 276f1b88eecb with local (Exim 4.92) (envelope-from ) id 1n6tgI-0003JN-16; Mon, 10 Jan 2022 12:21:46 +0000 Date: Mon, 10 Jan 2022 20:21:41 +0800 From: kernel test robot To: Zhenyu Wang Cc: llvm@lists.linux.dev, kbuild-all@lists.01.org, linux-kernel@vger.kernel.org, Colin Xu Subject: drivers/gpu/drm/i915/gvt/gtt.c:1152: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst Message-ID: <202201102031.xPWND4ZH-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Zhenyu, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: df0cc57e057f18e44dac8e6c18aba47ab53202f9 commit: 145e06b58f8625becc61792a0554726314297a85 drm/i915/gvt: Move mdev attribute groups into kvmgt module date: 8 months ago config: x86_64-randconfig-a016-20210927 (https://download.01.org/0day-ci/archive/20220110/202201102031.xPWND4ZH-lkp@intel.com/config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project dc6e8dfdfe7efecfda318d43a06fae18b40eb498) 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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=145e06b58f8625becc61792a0554726314297a85 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 145e06b58f8625becc61792a0554726314297a85 # 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=x86_64 SHELL=/bin/bash drivers/gpu/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All warnings (new ones prefixed by >>): >> drivers/gpu/drm/i915/gvt/gtt.c:1152: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst * Check if can do 2M page drivers/gpu/drm/i915/gvt/gtt.c:2209: warning: expecting prototype for intel_vgpu_emulate_gtt_mmio_read(). Prototype was for intel_vgpu_emulate_ggtt_mmio_read() instead vim +1152 drivers/gpu/drm/i915/gvt/gtt.c 2707e44466881d Zhi Wang 2016-03-28 1150 b901b252b6cf5c Changbin Du 2018-05-15 1151 /** a752b070a67823 Zhenyu Wang 2018-07-31 @1152 * Check if can do 2M page a752b070a67823 Zhenyu Wang 2018-07-31 1153 * @vgpu: target vgpu a752b070a67823 Zhenyu Wang 2018-07-31 1154 * @entry: target pfn's gtt entry a752b070a67823 Zhenyu Wang 2018-07-31 1155 * 9317f356df83a5 Bhaskar Chowdhury 2021-02-22 1156 * Return 1 if 2MB huge gtt shadowing is possible, 0 if miscondition, 9317f356df83a5 Bhaskar Chowdhury 2021-02-22 1157 * negative if found err. b901b252b6cf5c Changbin Du 2018-05-15 1158 */ b901b252b6cf5c Changbin Du 2018-05-15 1159 static int is_2MB_gtt_possible(struct intel_vgpu *vgpu, b901b252b6cf5c Changbin Du 2018-05-15 1160 struct intel_gvt_gtt_entry *entry) b901b252b6cf5c Changbin Du 2018-05-15 1161 { b901b252b6cf5c Changbin Du 2018-05-15 1162 struct intel_gvt_gtt_pte_ops *ops = vgpu->gvt->gtt.pte_ops; b901b252b6cf5c Changbin Du 2018-05-15 1163 unsigned long pfn; b901b252b6cf5c Changbin Du 2018-05-15 1164 a61ac1e75105a0 Chris Wilson 2020-03-06 1165 if (!HAS_PAGE_SIZES(vgpu->gvt->gt->i915, I915_GTT_PAGE_SIZE_2M)) b901b252b6cf5c Changbin Du 2018-05-15 1166 return 0; b901b252b6cf5c Changbin Du 2018-05-15 1167 b901b252b6cf5c Changbin Du 2018-05-15 1168 pfn = intel_gvt_hypervisor_gfn_to_mfn(vgpu, ops->get_pfn(entry)); b901b252b6cf5c Changbin Du 2018-05-15 1169 if (pfn == INTEL_GVT_INVALID_ADDR) b901b252b6cf5c Changbin Du 2018-05-15 1170 return -EINVAL; b901b252b6cf5c Changbin Du 2018-05-15 1171 b901b252b6cf5c Changbin Du 2018-05-15 1172 return PageTransHuge(pfn_to_page(pfn)); b901b252b6cf5c Changbin Du 2018-05-15 1173 } b901b252b6cf5c Changbin Du 2018-05-15 1174 :::::: The code at line 1152 was first introduced by commit :::::: a752b070a67823174565322cc48b2668daf9a8da drm/i915/gvt: Fix function comment doc errors :::::: TO: Zhenyu Wang :::::: CC: Zhenyu Wang --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org