Hi Jane, Thank you for the patch! Yet something to improve: [auto build test ERROR on nvdimm/libnvdimm-for-next] [also build test ERROR on device-mapper-dm/for-next linus/master v5.17-rc8 next-20220318] [cannot apply to tip/x86/mm] [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/Jane-Chu/DAX-poison-recovery/20220319-143144 base: https://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm.git libnvdimm-for-next config: s390-randconfig-r044-20220318 (https://download.01.org/0day-ci/archive/20220319/202203191635.vyoiL17f-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project a6e70e4056dff962ec634c5bd4f2f4105a0bef71) 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/203570f765a6ad07eb5809850478a25a5257f7e2 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Jane-Chu/DAX-poison-recovery/20220319-143144 git checkout 203570f765a6ad07eb5809850478a25a5257f7e2 # 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/s390/block/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): In file included from drivers/s390/block/dcssblk.c:24: 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/s390/block/dcssblk.c:24: 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/s390/block/dcssblk.c:24: 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/s390/block/dcssblk.c:53:63: error: too few arguments to function call, expected 6, have 5 rc = dax_direct_access(dax_dev, pgoff, nr_pages, &kaddr, NULL); ~~~~~~~~~~~~~~~~~ ^ include/linux/dax.h:186:6: note: 'dax_direct_access' declared here long dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff, long nr_pages, ^ 12 warnings and 1 error generated. vim +53 drivers/s390/block/dcssblk.c 7a2765f6e82063f Dan Williams 2017-01-26 46 79fa974ff6bc3f7 Vivek Goyal 2020-02-28 47 static int dcssblk_dax_zero_page_range(struct dax_device *dax_dev, 79fa974ff6bc3f7 Vivek Goyal 2020-02-28 48 pgoff_t pgoff, size_t nr_pages) 79fa974ff6bc3f7 Vivek Goyal 2020-02-28 49 { 79fa974ff6bc3f7 Vivek Goyal 2020-02-28 50 long rc; 79fa974ff6bc3f7 Vivek Goyal 2020-02-28 51 void *kaddr; 79fa974ff6bc3f7 Vivek Goyal 2020-02-28 52 79fa974ff6bc3f7 Vivek Goyal 2020-02-28 @53 rc = dax_direct_access(dax_dev, pgoff, nr_pages, &kaddr, NULL); 79fa974ff6bc3f7 Vivek Goyal 2020-02-28 54 if (rc < 0) 79fa974ff6bc3f7 Vivek Goyal 2020-02-28 55 return rc; 79fa974ff6bc3f7 Vivek Goyal 2020-02-28 56 memset(kaddr, 0, nr_pages << PAGE_SHIFT); 79fa974ff6bc3f7 Vivek Goyal 2020-02-28 57 dax_flush(dax_dev, kaddr, nr_pages << PAGE_SHIFT); 79fa974ff6bc3f7 Vivek Goyal 2020-02-28 58 return 0; 79fa974ff6bc3f7 Vivek Goyal 2020-02-28 59 } 79fa974ff6bc3f7 Vivek Goyal 2020-02-28 60 --- 0-DAY CI Kernel Test Service https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
