reproduce:
        git checkout 5200f5f493f79f14bbdc349e402a40dfb32f23c8
        b4 shazam https://lore.kernel.org/r/20260519012754.240804-5-leobras.c@gmail.com
        make menuconfig
        # enable CONFIG_COMPILE_TEST, CONFIG_WARN_MISSING_DOCUMENTS, CONFIG_WARN_ABI_ERRORS
        # pip install -r Documentation/sphinx/requirements.txt
        make htmldocs