reproduce:
        git checkout next-20260303
        b4 shazam https://lore.kernel.org/r/20260304080706.2844472-1-flavra@baylibre.com
        make menuconfig
        # enable CONFIG_COMPILE_TEST, CONFIG_WARN_MISSING_DOCUMENTS, CONFIG_WARN_ABI_ERRORS
        # pip install -r Documentation/sphinx/requirements.txt
        make htmldocs