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 5DD2F364 for ; Tue, 22 Feb 2022 05:00:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1645506003; x=1677042003; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=NSYjEYnh0IwAQTorHEgFKb0m1zcBhwj7AmGboDg8XBw=; b=CgZDrUuy0MGD5n35lLrKJDeaUKA5b5OVuIuSEvqEDnIDLqHWR6RqnnlH kMe2mXxklJqV8Rg6txKrXl/5daOk9+i1vOyL7Vse5ISwl/UOKysP1d50a pzffljXvkkFXd1iIpXitiF3i49JwvRqAp3T7rOig4AzkE+WCVYDiex8Wr 51IPNm5lHzVTuYBAMBF/WXqUms5Zh7oEAG4uHuUJLptSqm18KrX2foO6W 2/Bp2JCGN+CE7iefR1rRWmOcz2tGewScVsKa4FzMY/4V9+Cx2GEeekaMW QmfvVoXZnSSmmhj8TOkpoI2RWC6362/ZqvsKZYklN1ox8gWcq6v2Q8Qvh w==; X-IronPort-AV: E=McAfee;i="6200,9189,10265"; a="232231353" X-IronPort-AV: E=Sophos;i="5.88,387,1635231600"; d="scan'208";a="232231353" Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Feb 2022 20:59:53 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.88,387,1635231600"; d="scan'208";a="776179469" Received: from lkp-server01.sh.intel.com (HELO da3212ac2f54) ([10.239.97.150]) by fmsmga006.fm.intel.com with ESMTP; 21 Feb 2022 20:59:52 -0800 Received: from kbuild by da3212ac2f54 with local (Exim 4.92) (envelope-from ) id 1nMNHD-0002Lq-M6; Tue, 22 Feb 2022 04:59:51 +0000 Date: Tue, 22 Feb 2022 12:59:00 +0800 From: kernel test robot To: Akhil R Cc: llvm@lists.linux.dev, kbuild-all@lists.01.org Subject: Re: [PATCH v20 2/2] dmaengine: tegra: Add tegra gpcdma driver Message-ID: <202202221207.lQ53BwKp-lkp@intel.com> References: <20220221153934.5226-3-akhilrajeev@nvidia.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 In-Reply-To: <20220221153934.5226-3-akhilrajeev@nvidia.com> User-Agent: Mutt/1.10.1 (2018-07-13) Hi Akhil, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on vkoul-dmaengine/next] [also build test WARNING on v5.17-rc5 next-20220217] [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/Akhil-R/Add-NVIDIA-Tegra-GPC-DMA-driver/20220221-234342 base: https://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine.git next config: s390-randconfig-c005-20220222 (https://download.01.org/0day-ci/archive/20220222/202202221207.lQ53BwKp-lkp@intel.com/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project d271fc04d5b97b12e6b797c6067d3c96a8d7470e) 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 s390 cross compiling tool for clang build # apt-get install binutils-s390x-linux-gnu # https://github.com/0day-ci/linux/commit/9788a023bf1c6b2221e7246794c13f3690bf5baa git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Akhil-R/Add-NVIDIA-Tegra-GPC-DMA-driver/20220221-234342 git checkout 9788a023bf1c6b2221e7246794c13f3690bf5baa # 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=s390 SHELL=/bin/bash drivers/dma/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All warnings (new ones prefixed by >>): In file included from drivers/dma/tegra186-gpc-dma.c:9: In file included from include/linux/dmaengine.h:12: In file included from include/linux/scatterlist.h:9: In file included from arch/s390/include/asm/io.h:75: include/asm-generic/io.h:464:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __raw_readb(PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:477:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:37:59: note: expanded from macro '__le16_to_cpu' #define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x)) ^ include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16' #define __swab16(x) (__u16)__builtin_bswap16((__u16)(x)) ^ In file included from drivers/dma/tegra186-gpc-dma.c:9: In file included from include/linux/dmaengine.h:12: In file included from include/linux/scatterlist.h:9: In file included from arch/s390/include/asm/io.h:75: include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:35:59: note: expanded from macro '__le32_to_cpu' #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x)) ^ include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32' #define __swab32(x) (__u32)__builtin_bswap32((__u32)(x)) ^ In file included from drivers/dma/tegra186-gpc-dma.c:9: In file included from include/linux/dmaengine.h:12: In file included from include/linux/scatterlist.h:9: In file included from arch/s390/include/asm/io.h:75: include/asm-generic/io.h:501:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writeb(value, PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:511:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:521:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:609:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsb(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:617:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsw(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:625:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsl(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:634:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesb(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:643:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesw(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:652:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesl(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ >> drivers/dma/tegra186-gpc-dma.c:1488:21: warning: attribute declaration must precede definition [-Wignored-attributes] static const struct __maybe_unused dev_pm_ops tegra_dma_dev_pm_ops = { ^ include/linux/compiler_attributes.h:286:56: note: expanded from macro '__maybe_unused' #define __maybe_unused __attribute__((__unused__)) ^ include/linux/pm.h:278:8: note: previous definition is here struct dev_pm_ops { ^ 13 warnings generated. vim +1488 drivers/dma/tegra186-gpc-dma.c 1487 > 1488 static const struct __maybe_unused dev_pm_ops tegra_dma_dev_pm_ops = { 1489 SET_SYSTEM_SLEEP_PM_OPS(tegra_dma_pm_suspend, tegra_dma_pm_resume) 1490 }; 1491 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org