From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.21]) (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 3DC55386557; Tue, 16 Jun 2026 11:22:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.21 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781608941; cv=none; b=HOldnDEuDJYI20SvSYYnAdXBOgfRKDWWqqRxYQI626V2hpJJ0V4JrTbYn4EMT/gZt18o/5UxJaPRGQiaqcMD0rTHcY9+W7x3MWUoJbMYI06wxk+I/JaY/x4KqfaMRK2PneNFR0SzbzlnTX9wihV+7FQWH38/g3qtlffZg+h2xE0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781608941; c=relaxed/simple; bh=nohL65ROZIqtmEJOb8WOvehUuPoWHPtjZtI1TlTx0/Y=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=oJUWoTbLj9+3Fbf74nfU/NztwJaa1EoySI/ThAxrtavPYjqkOEKXSODKQBUlSsCtxWk+Mlr1nTBhEOO9+Ahudhxa9xXFP6kFjaelzAO18p0/57G/N1Tyjf3OrNXZVh9gLiFIiriUhS9KU+aEjmstx5P9ltpXeoNFhp9x5k+8rNI= 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=gYVH7dtK; arc=none smtp.client-ip=198.175.65.21 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="gYVH7dtK" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1781608939; x=1813144939; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=nohL65ROZIqtmEJOb8WOvehUuPoWHPtjZtI1TlTx0/Y=; b=gYVH7dtKfdgg3Eo22nsb/iHWy0tGFgJjCp7cgmXALfVh6mrmv71da5o6 env9lj7QaJmZEws/3zYKV2X1taZYCUoOLfGZHmy0tNSAOJ6UYoZi2OoOu qZxzPWPQoZBuDYa0RcNx0lNO+uH/UjYE0HnQieYKtP48rWovtTit0jnxA HfmNWH/5ZLudKhxENwICwsJZdxr3LEza/eR7bZyANDWNeFpokO0mGa6iX h7mMvjRZCqBSKnyxDL2Gpf7kttdOh26FDL1MPTaIHlvD6PvwSd06atiQI fyDDLbaHrWYcf29pJrzKHvpWjWz0VuP/sU0f+daAAjjB/ITr7QXzrCqrS w==; X-CSE-ConnectionGUID: lv/pg06pTcKsMP0Ckml4fg== X-CSE-MsgGUID: 7JBt8pmHRNqdsiERN8PmRg== X-IronPort-AV: E=McAfee;i="6800,10657,11818"; a="82271779" X-IronPort-AV: E=Sophos;i="6.24,208,1774335600"; d="scan'208";a="82271779" Received: from fmviesa007.fm.intel.com ([10.60.135.147]) by orvoesa113.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Jun 2026 04:22:18 -0700 X-CSE-ConnectionGUID: yuoDe4CTQU+HO5V73soi0g== X-CSE-MsgGUID: ccB/ruOPR8KdguyS4qxCSw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.24,208,1774335600"; d="scan'208";a="244860539" Received: from lkp-server01.sh.intel.com (HELO f0d55cb201f0) ([10.239.97.150]) by fmviesa007.fm.intel.com with ESMTP; 16 Jun 2026 04:22:14 -0700 Received: from kbuild by f0d55cb201f0 with local (Exim 4.98.2) (envelope-from ) id 1wZRrv-00000000T66-2F3Z; Tue, 16 Jun 2026 11:22:11 +0000 Date: Tue, 16 Jun 2026 19:21:11 +0800 From: kernel test robot To: Luigi Rizzo , rizzo.unipi@gmail.com, m.szyprowski@samsung.com, robin.murphy@arm.com, willemb@google.com, kuniyu@google.com, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com Cc: oe-kbuild-all@lists.linux.dev, gregkh@linuxfoundation.org, rafael@kernel.org, akpm@linux-foundation.org, david@kernel.org, netdev@vger.kernel.org, linux-mm@kvack.org, iommu@lists.linux.dev, driver-core@lists.linux.dev, linux-kernel@vger.kernel.org Subject: Re: [PATCH] swiotlb: avoid double copy with swiotlb on tx socket Message-ID: <202606161921.OPkgBApm-lkp@intel.com> References: <20260615234220.3946885-1-lrizzo@google.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260615234220.3946885-1-lrizzo@google.com> Hi Luigi, kernel test robot noticed the following build warnings: [auto build test WARNING on akpm-mm/mm-everything] [also build test WARNING on linus/master v7.1 next-20260615] [cannot apply to driver-core/driver-core-testing driver-core/driver-core-next driver-core/driver-core-linus] [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/Luigi-Rizzo/swiotlb-avoid-double-copy-with-swiotlb-on-tx-socket/20260616-074655 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/20260615234220.3946885-1-lrizzo%40google.com patch subject: [PATCH] swiotlb: avoid double copy with swiotlb on tx socket config: arm-randconfig-r122-20260616 (https://download.01.org/0day-ci/archive/20260616/202606161921.OPkgBApm-lkp@intel.com/config) compiler: arm-linux-gnueabi-gcc (GCC) 16.1.0 sparse: v0.6.5-rc1 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260616/202606161921.OPkgBApm-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/202606161921.OPkgBApm-lkp@intel.com/ sparse warnings: (new ones prefixed by >>) kernel/dma/swiotlb.c: note: in included file (through include/linux/dma-direct.h): >> include/linux/swiotlb.h:229:65: sparse: sparse: Using plain integer as NULL pointer >> include/linux/swiotlb.h:229:65: sparse: sparse: Using plain integer as NULL pointer vim +229 include/linux/swiotlb.h 224 225 static inline bool is_zerocopy_swiotlb_folio(struct page *page) 226 { 227 struct folio *folio = page_folio(page); 228 > 229 return folio_test_zcswiotlb(folio) && folio->private != 0; 230 } 231 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki