reproduce:
        git checkout 06cb687a5132fcffe624c0070576ab852ac6b568
        b4 shazam https://lore.kernel.org/r/20260616-enc_roi_enable-v1-3-fefcc4e76f33@oss.qualcomm.com
        make menuconfig
        # enable CONFIG_COMPILE_TEST, CONFIG_WARN_MISSING_DOCUMENTS, CONFIG_WARN_ABI_ERRORS
        # pip install -r Documentation/sphinx/requirements.txt
        make htmldocs