reproduce:
        git remote add mtd https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git
        git fetch mtd mtd/next
        git checkout mtd/mtd/next
        b4 shazam https://lore.kernel.org/r/20250311122847.90081-4-balamanikandan.gunasundar@microchip.com
        make menuconfig
        # enable CONFIG_COMPILE_TEST, CONFIG_WARN_MISSING_DOCUMENTS, CONFIG_WARN_ABI_ERRORS
        # install Sphinx 2.4.4
        make htmldocs