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 4528D63B for ; Mon, 25 Jul 2022 11:00:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1658746819; x=1690282819; h=date:from:to:cc:subject:message-id:mime-version; bh=mo9chgy0bi5uG+EZ6kmOhhKH/zG+YyE1Qh3F/VVxZYk=; b=KSB+Y+0gg55a1sq1yf4yamJ13i7TXqykZT3TeXfFCaS5d53Czg0hrHC2 VMZ856/3z17ZJIuJEIq7S3T+az37Ek0H5bvvKVRsZ6rssvax/ztbrp8aG PkTMwp7Syr59jMV40EyvmlxNXG/fV+rSw7wAh9vxx32PXSEhg2y5XdslW 5xN+qk1LSCnawHtoD96EZFRo547b48FQ7nUEvgdpaDANYZl5I5EE1q7qI qOIUaJUx+Xhdtocuf8hjQ+OedkuCy2aw0MHQdfsfG0SNBvQvApI1xz58q 4i21fuJf30yRhcry4aJLKrClC+2QWhC7/HIpTR6v/hBUlChcUop6J0Vud A==; X-IronPort-AV: E=McAfee;i="6400,9594,10418"; a="268063098" X-IronPort-AV: E=Sophos;i="5.93,192,1654585200"; d="scan'208";a="268063098" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Jul 2022 04:00:18 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.93,192,1654585200"; d="scan'208";a="549949151" Received: from lkp-server01.sh.intel.com (HELO e0eace57cfef) ([10.239.97.150]) by orsmga003.jf.intel.com with ESMTP; 25 Jul 2022 04:00:16 -0700 Received: from kbuild by e0eace57cfef with local (Exim 4.96) (envelope-from ) id 1oFvot-0004yf-34; Mon, 25 Jul 2022 11:00:15 +0000 Date: Mon, 25 Jul 2022 18:59:31 +0800 From: kernel test robot To: Lorenzo Bianconi Cc: llvm@lists.linux.dev, kbuild-all@lists.01.org, linux-kernel@vger.kernel.org, Felix Fietkau Subject: drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c:262:17: warning: taking address of packed member 'len' of class or structure 'tlv' may result in an unaligned pointer value Message-ID: <202207251801.hLXIP9Rh-lkp@intel.com> 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 tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: e0dccc3b76fb35bb257b4118367a883073d7390e commit: 25702d9c55dc5fda2ad9ad8de115e50dc7394ef9 mt76: connac: rely on le16_add_cpu in mt76_connac_mcu_add_nested_tlv date: 7 months ago config: arm-buildonly-randconfig-r003-20220724 (https://download.01.org/0day-ci/archive/20220725/202207251801.hLXIP9Rh-lkp@intel.com/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 9e88cbcc403bdf82f29259ad60ff60a8fc4434a1) 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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=25702d9c55dc5fda2ad9ad8de115e50dc7394ef9 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 25702d9c55dc5fda2ad9ad8de115e50dc7394ef9 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash drivers/net/wireless/mediatek/mt76/ If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot All warnings (new ones prefixed by >>): >> drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c:262:17: warning: taking address of packed member 'len' of class or structure 'tlv' may result in an unaligned pointer value [-Waddress-of-packed-member] le16_add_cpu(&sta_hdr->len, len); ^~~~~~~~~~~~ 1 warning generated. vim +262 drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c 242 243 struct tlv * 244 mt76_connac_mcu_add_nested_tlv(struct sk_buff *skb, int tag, int len, 245 void *sta_ntlv, void *sta_wtbl) 246 { 247 struct sta_ntlv_hdr *ntlv_hdr = sta_ntlv; 248 struct tlv *sta_hdr = sta_wtbl; 249 struct tlv *ptlv, tlv = { 250 .tag = cpu_to_le16(tag), 251 .len = cpu_to_le16(len), 252 }; 253 u16 ntlv; 254 255 ptlv = skb_put(skb, len); 256 memcpy(ptlv, &tlv, sizeof(tlv)); 257 258 ntlv = le16_to_cpu(ntlv_hdr->tlv_num); 259 ntlv_hdr->tlv_num = cpu_to_le16(ntlv + 1); 260 261 if (sta_hdr) > 262 le16_add_cpu(&sta_hdr->len, len); 263 264 return ptlv; 265 } 266 EXPORT_SYMBOL_GPL(mt76_connac_mcu_add_nested_tlv); 267 -- 0-DAY CI Kernel Test Service https://01.org/lkp