Hi Masami,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on arnd-asm-generic/master]
[also build test ERROR on linus/master v6.1 next-20221208]
[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/Masami-Hiramatsu-Google/error-injection-Clarify-the-requirements-of-error-injectable-functions/20221212-104859
base:   https://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic.git master
patch link:    https://lore.kernel.org/r/167081320421.387937.4259807348852421112.stgit%40devnote3
patch subject: [PATCH 1/2] error-injection: Remove EI_ETYPE_NONE
config: arc-randconfig-r005-20221211
compiler: arc-elf-gcc (GCC) 12.1.0
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/ffd600c8d5c881bc0e58401c24c7457a566f6207
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Masami-Hiramatsu-Google/error-injection-Clarify-the-requirements-of-error-injectable-functions/20221212-104859
        git checkout ffd600c8d5c881bc0e58401c24c7457a566f6207
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arc SHELL=/bin/bash fs/btrfs/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   In file included from fs/btrfs/tree-checker.c:20:
   include/linux/error-injection.h: In function 'get_injectable_error_type':
>> include/linux/error-injection.h:22:17: error: 'EOPNOTSUPP' undeclared (first use in this function)
      22 |         return -EOPNOTSUPP;
         |                 ^~~~~~~~~~
   include/linux/error-injection.h:22:17: note: each undeclared identifier is reported only once for each function it appears in


vim +/EOPNOTSUPP +22 include/linux/error-injection.h

    19	
    20	static inline int get_injectable_error_type(unsigned long addr)
    21	{
  > 22		return -EOPNOTSUPP;
    23	}
    24	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp