From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) (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 1F8922C9D for ; Fri, 28 Jan 2022 12:41:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1643373686; x=1674909686; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=TljAc77cIYPobouXpV0TYuPSSZj/Npa/4BeXqUL/45g=; b=X7wXll2PiWffavx1q+MFJNm2bmwmcY7fumiUmBPrfDJt6LA+iQS7nX9u Va1ojMrgil/KCGMNRJtanrNmlgkaHBlf7DJ+fOxIGOVWq6WktkOiFBYMX +UZcOFKS7LbwwYx20lwLIH3nlVN9btULnVPfutUiOJs/4FtI15BvBmkTw 4BgIPJhSaBhSrzB+6i8GgOh/tla3LWzI0brYgl+J1Uza7VjCjA7zgi6fL ssQLRQ/z3n2UXx8gwRsp8Lbz/SwrbxHUFuNXkm86lE4Yf/9lprI8TgQHO NRJWhecF7bNilNexs+Yp0A12lQRw18gSDK/0ObmGFZCnSHgZXJWe2UWBR A==; X-IronPort-AV: E=McAfee;i="6200,9189,10240"; a="227783725" X-IronPort-AV: E=Sophos;i="5.88,323,1635231600"; d="scan'208";a="227783725" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Jan 2022 04:41:23 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.88,323,1635231600"; d="scan'208";a="598197569" Received: from lkp-server01.sh.intel.com (HELO 276f1b88eecb) ([10.239.97.150]) by fmsmga004.fm.intel.com with ESMTP; 28 Jan 2022 04:41:20 -0800 Received: from kbuild by 276f1b88eecb with local (Exim 4.92) (envelope-from ) id 1nDQZ6-000Nrr-4J; Fri, 28 Jan 2022 12:41:20 +0000 Date: Fri, 28 Jan 2022 20:40:48 +0800 From: kernel test robot To: cgel.zte@gmail.com, jiri@resnulli.us Cc: llvm@lists.linux.dev, kbuild-all@lists.01.org, ivecera@redhat.com, davem@davemloft.net, kuba@kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, "Minghao Chi (CGEL ZTE)" , Zeal Robot Subject: Re: [PATCH] net/switchdev: use struct_size over open coded arithmetic Message-ID: <202201282035.8dNEcULs-lkp@intel.com> References: <20220128075729.1211352-1-chi.minghao@zte.com.cn> 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 In-Reply-To: <20220128075729.1211352-1-chi.minghao@zte.com.cn> User-Agent: Mutt/1.10.1 (2018-07-13) Hi, Thank you for the patch! Yet something to improve: [auto build test ERROR on linus/master] [also build test ERROR on v5.17-rc1 next-20220128] [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] url: https://github.com/0day-ci/linux/commits/cgel-zte-gmail-com/net-switchdev-use-struct_size-over-open-coded-arithmetic/20220128-155848 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 23a46422c56144939c091c76cf389aa863ce9c18 config: arm-orion5x_defconfig (https://download.01.org/0day-ci/archive/20220128/202201282035.8dNEcULs-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 arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi # https://github.com/0day-ci/linux/commit/bf0e33a8c3deb700b95173a37dd16754341ba70e git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review cgel-zte-gmail-com/net-switchdev-use-struct_size-over-open-coded-arithmetic/20220128-155848 git checkout bf0e33a8c3deb700b95173a37dd16754341ba70e # 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=arm SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All errors (new ones prefixed by >>): >> net/switchdev/switchdev.c:88:19: error: member reference type 'struct switchdev_deferred_item' is not a pointer; did you mean to use '.'? dfitem = kmalloc(struct_size(*dfitem, data, data_len), GFP_ATOMIC); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/overflow.h:194:18: note: expanded from macro 'struct_size' sizeof(*(p)->member) + __must_be_array((p)->member),\ ~~~^ >> net/switchdev/switchdev.c:88:19: error: indirection requires pointer operand ('unsigned long[]' invalid) dfitem = kmalloc(struct_size(*dfitem, data, data_len), GFP_ATOMIC); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/overflow.h:194:14: note: expanded from macro 'struct_size' sizeof(*(p)->member) + __must_be_array((p)->member),\ ^~~~~~~~~~~~ >> net/switchdev/switchdev.c:88:19: error: member reference type 'struct switchdev_deferred_item' is not a pointer; did you mean to use '.'? dfitem = kmalloc(struct_size(*dfitem, data, data_len), GFP_ATOMIC); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/overflow.h:194:49: note: expanded from macro 'struct_size' sizeof(*(p)->member) + __must_be_array((p)->member),\ ~~~~~~~~~~~~~~~~~~~^~~~~~~~~ include/linux/compiler.h:258:59: note: expanded from macro '__must_be_array' #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0])) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~ include/linux/compiler_types.h:287:63: note: expanded from macro '__same_type' #define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b)) ^ include/linux/build_bug.h:16:62: note: expanded from macro 'BUILD_BUG_ON_ZERO' #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); }))) ^ >> net/switchdev/switchdev.c:88:19: error: member reference type 'struct switchdev_deferred_item' is not a pointer; did you mean to use '.'? dfitem = kmalloc(struct_size(*dfitem, data, data_len), GFP_ATOMIC); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/overflow.h:194:49: note: expanded from macro 'struct_size' sizeof(*(p)->member) + __must_be_array((p)->member),\ ~~~~~~~~~~~~~~~~~~~^~~~~~~~~ include/linux/compiler.h:258:65: note: expanded from macro '__must_be_array' #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0])) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~ include/linux/compiler_types.h:287:74: note: expanded from macro '__same_type' #define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b)) ^ include/linux/build_bug.h:16:62: note: expanded from macro 'BUILD_BUG_ON_ZERO' #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); }))) ^ >> net/switchdev/switchdev.c:88:19: error: indirection requires pointer operand ('struct switchdev_deferred_item' invalid) dfitem = kmalloc(struct_size(*dfitem, data, data_len), GFP_ATOMIC); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/overflow.h:195:14: note: expanded from macro 'struct_size' sizeof(*(p))) ^~~~ 5 errors generated. vim +88 net/switchdev/switchdev.c 81 82 static int switchdev_deferred_enqueue(struct net_device *dev, 83 const void *data, size_t data_len, 84 switchdev_deferred_func_t *func) 85 { 86 struct switchdev_deferred_item *dfitem; 87 > 88 dfitem = kmalloc(struct_size(*dfitem, data, data_len), GFP_ATOMIC); 89 if (!dfitem) 90 return -ENOMEM; 91 dfitem->dev = dev; 92 dfitem->func = func; 93 memcpy(dfitem->data, data, data_len); 94 dev_hold_track(dev, &dfitem->dev_tracker, GFP_ATOMIC); 95 spin_lock_bh(&deferred_lock); 96 list_add_tail(&dfitem->list, &deferred); 97 spin_unlock_bh(&deferred_lock); 98 schedule_work(&deferred_process_work); 99 return 0; 100 } 101 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org