reproduce:
        # https://git.kernel.org/pub/scm/linux/kernel/git/broonie/ci.git/commit/?id=ba46edca354e66d71d176bb88fe1c01594c45871
        git remote add broonie-ci https://git.kernel.org/pub/scm/linux/kernel/git/broonie/ci.git
        git fetch --no-tags broonie-ci asoc-7.2
        git checkout ba46edca354e66d71d176bb88fe1c01594c45871
        make menuconfig
        # enable CONFIG_COMPILE_TEST, CONFIG_WARN_MISSING_DOCUMENTS, CONFIG_WARN_ABI_ERRORS
        # pip install -r Documentation/sphinx/requirements.txt
        make htmldocs