From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.18]) (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 4EC5021767D for ; Mon, 5 Oct 2026 12:47:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791204442; cv=none; b=UqASK89CaCHXYbmvcbZc5YxrbBk1DVJJXs+2OuAsBz+W90mxGktcSpABiRzFDJGJTmZsR0b9k8QaEMFrPogdxhnnK6zOZlP1GP7Xwx8QFaXBrowW5HnegxFLNApRwOzJhe+GQANr0LRuR3l+Is5x1Ho+wuzK65AtzhX558C8R0E= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791204442; c=relaxed/simple; bh=LsQb6UgD+RGj18HUXE/md4fjQNjtQflIlJ4Hr7CbDnY=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:Content-Type: Content-Disposition; b=OZjFpioz/1WytufaWygxkJR4aZZXvuBn+J78RvoRQtaWqpGWjC2kbr4/Aiugntv18NZ0+4CxDPUJClsLM26SFw2xTMzaMi531ohFtTcnBB7IPuprrd79VyqrzEPXus01FYLrueZWeUusdy/nFO3RvFq+VDxIB+0tj3d2SLrkLlQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=j5L1gtkV; arc=none smtp.client-ip=192.198.163.18 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="j5L1gtkV" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1791204441; x=1822740441; h=date:from:to:cc:subject:message-id:mime-version; bh=LsQb6UgD+RGj18HUXE/md4fjQNjtQflIlJ4Hr7CbDnY=; b=j5L1gtkVqxtKrQz684IqRFUSYbT7q6/jo58bQbhTJF+SEjnT5xTuqG4o FlH1PEXktA8EkIvZB16Na+tlmH6yMilf1mGiG3VQ5GSgRJkMK69COhduX F5mv0ZTY2wAGffcrzP5vi2FUOxYhLgit3hNZ25wC4dZiKZGZxhagYBppx LtWASrWcULVI3IndDN2QomZuS88JqFf/tdNjwr7BWhaHzn+v1K+Yjin3Q Gto9QXDjkQk3IKxCD2RFevRr9R6eMpN2wwELupCci1o8jAc+QYW1dNuqh JJtjKB2gyCwE2cpMk8IY/78SgA2IkHkBZGk2bF3BCtKCldHXaralWf6ap g==; X-CSE-ConnectionGUID: PpG2HrQ4SeavNQkYebdUMQ== X-CSE-MsgGUID: aZQdq8n4TbqNSptCp4jvKQ== X-IronPort-AV: E=McAfee;i="6800,10657,11925"; a="91003784" X-IronPort-AV: E=Sophos;i="6.27,142,1787036400"; d="scan'208";a="91003784" Received: from orviesa005.jf.intel.com ([10.64.159.145]) by fmvoesa112.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Oct 2026 05:47:20 -0700 X-CSE-ConnectionGUID: hnuYn8n/QE+3xp7ZeuT/DA== X-CSE-MsgGUID: jW08QOMsT6iA55/Nr28d2w== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.27,142,1787036400"; d="scan'208";a="280553239" Received: from igk-lkp-server01.igk.intel.com (HELO d0de6c2a75a7) ([10.211.93.152]) by orviesa005.jf.intel.com with ESMTP; 05 Oct 2026 05:47:19 -0700 Received: from kbuild by d0de6c2a75a7 with local (Exim 4.98.2) (envelope-from ) id 1xDi69-0000000007r-2oHC; Mon, 05 Oct 2026 12:47:17 +0000 Date: Mon, 5 Oct 2026 14:46:42 +0200 From: kernel test robot To: oe-kbuild@lists.linux.dev Cc: lkp@intel.com, Dan Carpenter Subject: Re: arm64: csum: Add fused copy and Internet checksum Message-ID: <202610051422.TPjuBOMt-lkp@intel.com> Precedence: bulk X-Mailing-List: oe-kbuild@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Unfiltered warning: this smatch report is sent as-is and has not been reviewed for false positives, so please treat it with due skepticism. BCC: lkp@intel.com CC: oe-kbuild-all@lists.linux.dev In-Reply-To: <202610051422.TPjuBOMt-lkp@intel.com> References: <202610051422.TPjuBOMt-lkp@intel.com> Hi Demian, kernel test robot noticed the following build warnings: url: https://github.com/intel-lab-lkp/linux/commits/Demian-Shulhan/arm64-csum-Add-fused-copy-and-Internet-checksum/20260927-151757 base: patch link: https://lore.kernel.org/r/202610051422.TPjuBOMt-lkp%40intel.com :::::: branch date: 8 days ago :::::: commit date: 8 days ago config: arm64-randconfig-r2200-20261003 (https://download.01.org/0day-ci/archive/20261005/202610051422.TPjuBOMt-lkp@intel.com/config) compiler: aarch64-linux-gcc (GCC) 16.1.0 smatch: v0.5.0-9187-g5189e3fb 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 | Reported-by: Dan Carpenter | Closes: https://lore.kernel.org/r/202610051422.TPjuBOMt-lkp@intel.com/ New smatch warnings: arch/arm64/lib/csum-copy-neon.c:93 (null)() warn: statement has no effect 'uint8x16_t' Old smatch warnings: arch/arm64/lib/csum-copy-neon.c:103 (null)() warn: statement has no effect 'uint8x16_t' vim +/uint8x16_t +93 arch/arm64/lib/csum-copy-neon.c 15b4870d68269b Demian Shulhan 2026-09-27 81 15b4870d68269b Demian Shulhan 2026-09-27 82 __wsum __csum_partial_copy_neon(const void *src, void *dst, int len) 15b4870d68269b Demian Shulhan 2026-09-27 83 { 15b4870d68269b Demian Shulhan 2026-09-27 84 const u8 *s = src; 15b4870d68269b Demian Shulhan 2026-09-27 85 u8 *d = dst; 15b4870d68269b Demian Shulhan 2026-09-27 86 uint64x2_t acc0 = { }, acc1 = { }; 15b4870d68269b Demian Shulhan 2026-09-27 87 unsigned int head = -(unsigned long)d & 15; 15b4870d68269b Demian Shulhan 2026-09-27 88 unsigned int tail = (len - head) & 15; 15b4870d68269b Demian Shulhan 2026-09-27 89 u32 sum; 15b4870d68269b Demian Shulhan 2026-09-27 90 15b4870d68269b Demian Shulhan 2026-09-27 91 if (tail) { 15b4870d68269b Demian Shulhan 2026-09-27 92 /* Final vector, ending exactly at the buffer end; see above */ 15b4870d68269b Demian Shulhan 2026-09-27 @93 uint8x16_t v = vld1q_u8(s + len - 16); -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki