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Sat, 26 Mar 2022 11:05:12 +0000 Date: Sat, 26 Mar 2022 19:04:13 +0800 From: kernel test robot To: Bart Van Assche Cc: llvm@lists.linux.dev, kbuild-all@lists.01.org, linux-kernel@vger.kernel.org Subject: [bvanassche:ufs-for-next-2022-03-25 32/32] drivers/scsi/ufs-drivers/ufs-exynos.c:1596:34: warning: unused variable 'exynos_ufs_of_match' Message-ID: <202203261830.M6xPZjki-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Bart, First bad commit (maybe != root cause): tree: https://github.com/bvanassche/linux ufs-for-next-2022-03-25 head: 976ba17fe820846e56fb154b1ae35f5d90be192b commit: 976ba17fe820846e56fb154b1ae35f5d90be192b [32/32] scsi: ufs: Split the drivers/scsi/ufs directory config: s390-randconfig-r013-20220324 (https://download.01.org/0day-ci/archive/20220326/202203261830.M6xPZjki-lkp@intel.com/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 0f6d9501cf49ce02937099350d08f20c4af86f3d) 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/bvanassche/linux/commit/976ba17fe820846e56fb154b1ae35f5d90be192b git remote add bvanassche https://github.com/bvanassche/linux git fetch --no-tags bvanassche ufs-for-next-2022-03-25 git checkout 976ba17fe820846e56fb154b1ae35f5d90be192b # 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/scsi/ufs-drivers/ 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/scsi/ufs-drivers/ufs-exynos.c:16: In file included from include/linux/of_address.h:7: In file included from include/linux/io.h:13: 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/scsi/ufs-drivers/ufs-exynos.c:16: In file included from include/linux/of_address.h:7: In file included from include/linux/io.h:13: 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/scsi/ufs-drivers/ufs-exynos.c:16: In file included from include/linux/of_address.h:7: In file included from include/linux/io.h:13: 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/scsi/ufs-drivers/ufs-exynos.c:1596:34: warning: unused variable 'exynos_ufs_of_match' [-Wunused-const-variable] static const struct of_device_id exynos_ufs_of_match[] = { ^ 13 warnings generated. vim +/exynos_ufs_of_match +1596 drivers/scsi/ufs-drivers/ufs-exynos.c 55f4b1f73631a0 drivers/scsi/ufs/ufs-exynos.c Alim Akhtar 2020-05-28 1595 55f4b1f73631a0 drivers/scsi/ufs/ufs-exynos.c Alim Akhtar 2020-05-28 @1596 static const struct of_device_id exynos_ufs_of_match[] = { 55f4b1f73631a0 drivers/scsi/ufs/ufs-exynos.c Alim Akhtar 2020-05-28 1597 { .compatible = "samsung,exynos7-ufs", 55f4b1f73631a0 drivers/scsi/ufs/ufs-exynos.c Alim Akhtar 2020-05-28 1598 .data = &exynos_ufs_drvs }, cc52e15397cc5d drivers/scsi/ufs/ufs-exynos.c Chanho Park 2021-10-18 1599 { .compatible = "samsung,exynosautov9-ufs", cc52e15397cc5d drivers/scsi/ufs/ufs-exynos.c Chanho Park 2021-10-18 1600 .data = &exynosauto_ufs_drvs }, be39f4fd8dd430 drivers/scsi/ufs/ufs-exynos.c Chanho Park 2021-10-18 1601 { .compatible = "samsung,exynosautov9-ufs-vh", be39f4fd8dd430 drivers/scsi/ufs/ufs-exynos.c Chanho Park 2021-10-18 1602 .data = &exynosauto_ufs_vh_drvs }, 55f4b1f73631a0 drivers/scsi/ufs/ufs-exynos.c Alim Akhtar 2020-05-28 1603 {}, 55f4b1f73631a0 drivers/scsi/ufs/ufs-exynos.c Alim Akhtar 2020-05-28 1604 }; 55f4b1f73631a0 drivers/scsi/ufs/ufs-exynos.c Alim Akhtar 2020-05-28 1605 :::::: The code at line 1596 was first introduced by commit :::::: 55f4b1f73631a0817717fe6e98517de51b4c3527 scsi: ufs: ufs-exynos: Add UFS host support for Exynos SoCs :::::: TO: Alim Akhtar :::::: CC: Martin K. Petersen -- 0-DAY CI Kernel Test Service https://01.org/lkp