Hi Chao, kernel test robot noticed the following build warnings: [auto build test WARNING on jaegeuk-f2fs/dev-test] [cannot apply to jaegeuk-f2fs/dev linus/master v6.4-rc2 next-20230516] [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/Chao-Yu/f2fs-flush-error-flags-in-workqueue/20230516-152832 base: https://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs.git dev-test patch link: https://lore.kernel.org/r/20230516072755.3138097-1-chao%40kernel.org patch subject: [PATCH] f2fs: flush error flags in workqueue config: hexagon-randconfig-r041-20230515 compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project b0fb98227c90adf2536c9ad644a74d5e92961111) 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 # https://github.com/intel-lab-lkp/linux/commit/874c7ca40fa37e2697f9d2ac271147c5cafdddaa git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Chao-Yu/f2fs-flush-error-flags-in-workqueue/20230516-152832 git checkout 874c7ca40fa37e2697f9d2ac271147c5cafdddaa # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash fs/f2fs/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot | Link: https://lore.kernel.org/oe-kbuild-all/202305161822.PYax3mhx-lkp@intel.com/ All warnings (new ones prefixed by >>): In file included from fs/f2fs/super.c:14: In file included from include/linux/buffer_head.h:12: In file included from include/linux/blk_types.h:10: 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/hexagon/include/generated/asm/hardirq.h:1: 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/hexagon/include/asm/io.h:334: 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/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu' #define __le16_to_cpu(x) ((__force __u16)(__le16)(x)) ^ In file included from fs/f2fs/super.c:14: In file included from include/linux/buffer_head.h:12: In file included from include/linux/blk_types.h:10: 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/hexagon/include/generated/asm/hardirq.h:1: 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/hexagon/include/asm/io.h:334: 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/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu' #define __le32_to_cpu(x) ((__force __u32)(__le32)(x)) ^ In file included from fs/f2fs/super.c:14: In file included from include/linux/buffer_head.h:12: In file included from include/linux/blk_types.h:10: 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/hexagon/include/generated/asm/hardirq.h:1: 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/hexagon/include/asm/io.h:334: 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); ~~~~~~~~~~ ^ >> fs/f2fs/super.c:4027:6: warning: no previous prototype for function 'f2fs_record_errors' [-Wmissing-prototypes] void f2fs_record_errors(struct f2fs_sb_info *sbi, unsigned char error) ^ fs/f2fs/super.c:4027:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void f2fs_record_errors(struct f2fs_sb_info *sbi, unsigned char error) ^ static 7 warnings generated. vim +/f2fs_record_errors +4027 fs/f2fs/super.c 4026 > 4027 void f2fs_record_errors(struct f2fs_sb_info *sbi, unsigned char error) 4028 { 4029 int err; 4030 4031 f2fs_down_write(&sbi->sb_lock); 4032 4033 if (!f2fs_update_errors(sbi)) 4034 goto out_unlock; 4035 4036 err = f2fs_commit_super(sbi, false); 4037 if (err) 4038 f2fs_err(sbi, "f2fs_commit_super fails to record errors:%u, err:%d", 4039 error, err); 4040 out_unlock: 4041 f2fs_up_write(&sbi->sb_lock); 4042 } 4043 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests