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X-IronPort-AV: E=McAfee;i="6600,9927,10964"; a="9788321" X-IronPort-AV: E=Sophos;i="6.05,220,1701158400"; d="scan'208";a="9788321" Received: from fmviesa002.fm.intel.com ([10.60.135.142]) by orvoesa105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Jan 2024 03:51:55 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.05,220,1701158400"; d="scan'208";a="21626178" Received: from lkp-server01.sh.intel.com (HELO 370188f8dc87) ([10.239.97.150]) by fmviesa002.fm.intel.com with ESMTP; 27 Jan 2024 03:51:50 -0800 Received: from kbuild by 370188f8dc87 with local (Exim 4.96) (envelope-from ) id 1rThDx-0002HM-0h; Sat, 27 Jan 2024 11:51:49 +0000 Date: Sat, 27 Jan 2024 19:51:33 +0800 From: kernel test robot To: Yunjian Wang , mst@redhat.com, willemdebruijn.kernel@gmail.com, jasowang@redhat.com, kuba@kernel.org, davem@davemloft.net, magnus.karlsson@intel.com Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, virtualization@lists.linux.dev, xudingke@huawei.com, Yunjian Wang Subject: Re: [PATCH net-next 2/2] tun: AF_XDP Rx zero-copy support Message-ID: <202401271943.bs1GPeEU-lkp@intel.com> References: <1706089075-16084-1-git-send-email-wangyunjian@huawei.com> Precedence: bulk X-Mailing-List: kvm@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: <1706089075-16084-1-git-send-email-wangyunjian@huawei.com> Hi Yunjian, kernel test robot noticed the following build warnings: [auto build test WARNING on net-next/main] url: https://github.com/intel-lab-lkp/linux/commits/Yunjian-Wang/xsk-Remove-non-zero-dma_page-check-in-xp_assign_dev/20240124-174011 base: net-next/main patch link: https://lore.kernel.org/r/1706089075-16084-1-git-send-email-wangyunjian%40huawei.com patch subject: [PATCH net-next 2/2] tun: AF_XDP Rx zero-copy support config: um-allmodconfig (https://download.01.org/0day-ci/archive/20240127/202401271943.bs1GPeEU-lkp@intel.com/config) compiler: clang version 18.0.0git (https://github.com/llvm/llvm-project a31a60074717fc40887cfe132b77eec93bedd307) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240127/202401271943.bs1GPeEU-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/202401271943.bs1GPeEU-lkp@intel.com/ All warnings (new ones prefixed by >>): In file included from drivers/net/tun.c:44: In file included from include/linux/skbuff.h:17: In file included from include/linux/bvec.h:10: In file included from include/linux/highmem.h:12: In file included from include/linux/hardirq.h:11: In file included from arch/um/include/asm/hardirq.h:5: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/um/include/asm/io.h:24: include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 547 | val = __raw_readb(PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 560 | val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr)); | ~~~~~~~~~~ ^ include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu' 37 | #define __le16_to_cpu(x) ((__force __u16)(__le16)(x)) | ^ In file included from drivers/net/tun.c:44: In file included from include/linux/skbuff.h:17: In file included from include/linux/bvec.h:10: In file included from include/linux/highmem.h:12: In file included from include/linux/hardirq.h:11: In file included from arch/um/include/asm/hardirq.h:5: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/um/include/asm/io.h:24: include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 573 | val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); | ~~~~~~~~~~ ^ include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu' 35 | #define __le32_to_cpu(x) ((__force __u32)(__le32)(x)) | ^ In file included from drivers/net/tun.c:44: In file included from include/linux/skbuff.h:17: In file included from include/linux/bvec.h:10: In file included from include/linux/highmem.h:12: In file included from include/linux/hardirq.h:11: In file included from arch/um/include/asm/hardirq.h:5: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/um/include/asm/io.h:24: include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 584 | __raw_writeb(value, PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 594 | __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 604 | __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:692:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 692 | readsb(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:700:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 700 | readsw(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:708:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 708 | readsl(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:717:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 717 | writesb(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:726:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 726 | writesw(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:735:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 735 | writesl(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ >> drivers/net/tun.c:1298:5: warning: no previous prototype for function 'tun_xsk_pool_setup' [-Wmissing-prototypes] 1298 | int tun_xsk_pool_setup(struct net_device *dev, struct xsk_buff_pool *pool, | ^ drivers/net/tun.c:1298:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 1298 | int tun_xsk_pool_setup(struct net_device *dev, struct xsk_buff_pool *pool, | ^ | static 13 warnings generated. vim +/tun_xsk_pool_setup +1298 drivers/net/tun.c 1297 > 1298 int tun_xsk_pool_setup(struct net_device *dev, struct xsk_buff_pool *pool, 1299 u16 qid) 1300 { 1301 return pool ? tun_xsk_pool_enable(dev, pool, qid) : 1302 tun_xsk_pool_disable(dev, qid); 1303 } 1304 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki