reproduce:
        # apt-get install sparse
        # sparse version: v0.6.4-66-g0196afe1
        # https://github.com/zen-kernel/zen-kernel/commit/5d011d56a251d34b662ab84ce3ce22a317f396e6
        git remote add zen https://github.com/zen-kernel/zen-kernel
        git fetch --no-tags zen 6.13/zen-sauce
        git checkout 5d011d56a251d34b662ab84ce3ce22a317f396e6
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__ -fmax-errors=unlimited -fmax-warnings=unlimited' O=build_dir ARCH=x86_64 olddefconfig
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__ -fmax-errors=unlimited -fmax-warnings=unlimited' O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/firmware/cirrus/ drivers/pci/controller/ lib/