Hi Masahiro,

I love your patch! Perhaps something to improve:

[auto build test WARNING on masahiroy-kbuild/for-next]
[also build test WARNING on masahiroy-kbuild/fixes linus/master v6.1 next-20221220]
[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/Masahiro-Yamada/kbuild-make-W-1-warn-files-that-are-tracked-but-ignored-by-git/20221224-235253
base:   https://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild.git for-next
patch link:    https://lore.kernel.org/r/20221224155138.447912-2-masahiroy%40kernel.org
patch subject: [PATCH v2 2/2] kbuild: make W=1 warn files that are tracked but ignored by git
config: openrisc-randconfig-r024-20221225
compiler: or1k-linux-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/906c2c5c0c3230103325b146ec511fbb18d57cd1
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Masahiro-Yamada/kbuild-make-W-1-warn-files-that-are-tracked-but-ignored-by-git/20221224-235253
        git checkout 906c2c5c0c3230103325b146ec511fbb18d57cd1
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=openrisc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=openrisc SHELL=/bin/bash

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

All warnings (new ones prefixed by >>):

>> Documentation/devicetree/bindings/.yamllint: warning: ignored by one of the .gitignore files
>> drivers/clk/.kunitconfig: warning: ignored by one of the .gitignore files
>> drivers/gpu/drm/tests/.kunitconfig: warning: ignored by one of the .gitignore files
>> drivers/hid/.kunitconfig: warning: ignored by one of the .gitignore files
>> fs/ext4/.kunitconfig: warning: ignored by one of the .gitignore files
>> fs/fat/.kunitconfig: warning: ignored by one of the .gitignore files
>> kernel/kcsan/.kunitconfig: warning: ignored by one of the .gitignore files
>> lib/kunit/.kunitconfig: warning: ignored by one of the .gitignore files
>> mm/kfence/.kunitconfig: warning: ignored by one of the .gitignore files
>> tools/testing/selftests/arm64/tags/.gitignore: warning: ignored by one of the .gitignore files
>> tools/testing/selftests/arm64/tags/Makefile: warning: ignored by one of the .gitignore files
>> tools/testing/selftests/arm64/tags/run_tags_test.sh: warning: ignored by one of the .gitignore files
>> tools/testing/selftests/arm64/tags/tags_test.c: warning: ignored by one of the .gitignore files

-- 
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https://01.org/lkp