Hi Md, kernel test robot noticed the following build warnings: [auto build test WARNING on mtd/nand/next] [also build test WARNING on linus/master v6.3-rc7 next-20230419] [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/Md-Sadre-Alam/mtd-rawnand-qcom-Implement-exec_op/20230419-173849 base: https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next patch link: https://lore.kernel.org/r/20230419093617.27134-1-quic_mdalam%40quicinc.com patch subject: [PATCH V2] mtd: rawnand: qcom: Implement exec_op() config: s390-randconfig-r034-20230418 (https://download.01.org/0day-ci/archive/20230420/202304201013.6bradWxp-lkp@xxxxxxxxx/config) compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 437b7602e4a998220871de78afcb020b9c14a661) 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/intel-lab-lkp/linux/commit/a2d1599a63e93bde90166287021663cfc13c91b2 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Md-Sadre-Alam/mtd-rawnand-qcom-Implement-exec_op/20230419-173849 git checkout a2d1599a63e93bde90166287021663cfc13c91b2 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=s390 olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash drivers/mtd/nand/raw/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Link: https://lore.kernel.org/oe-kbuild-all/202304201013.6bradWxp-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): In file included from drivers/mtd/nand/raw/qcom_nandc.c:9: In file included from include/linux/dma-mapping.h:10: 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:547:31: 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:560:61: 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/mtd/nand/raw/qcom_nandc.c:9: In file included from include/linux/dma-mapping.h:10: 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:573:61: 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/mtd/nand/raw/qcom_nandc.c:9: In file included from include/linux/dma-mapping.h:10: 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:584:33: 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:594:59: 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:604:59: 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:692:20: 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:700:20: 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:708:20: 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:717:21: 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:726:21: 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:735:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesl(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ >> drivers/mtd/nand/raw/qcom_nandc.c:2617:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough] default: ^ drivers/mtd/nand/raw/qcom_nandc.c:2617:2: note: insert 'break;' to avoid fall-through default: ^ break; 13 warnings generated. vim +2617 drivers/mtd/nand/raw/qcom_nandc.c 2587 2588 static int qcom_op_cmd_mapping(struct qcom_nand_controller *nandc, u8 cmd, 2589 struct qcom_op *q_op) 2590 { 2591 int ret = 0; 2592 2593 switch (cmd) { 2594 case NAND_CMD_RESET: 2595 ret = OP_RESET_DEVICE; 2596 break; 2597 case NAND_CMD_READID: 2598 ret = OP_FETCH_ID; 2599 break; 2600 case NAND_CMD_PARAM: 2601 if (nandc->props->qpic_v2) 2602 ret = OP_PAGE_READ_ONFI_READ; 2603 else 2604 ret = OP_PAGE_READ; 2605 break; 2606 case NAND_CMD_ERASE1: 2607 case NAND_CMD_ERASE2: 2608 ret = OP_BLOCK_ERASE; 2609 break; 2610 case NAND_CMD_STATUS: 2611 ret = OP_CHECK_STATUS; 2612 break; 2613 case NAND_CMD_PAGEPROG: 2614 ret = OP_PROGRAM_PAGE; 2615 q_op->flag = NAND_CMD_PAGEPROG; 2616 nandc->exec_opwrite = true; > 2617 default: 2618 break; 2619 } 2620 2621 return ret; 2622 } 2623 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests
