reproduce:
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # apt-get install sparse
        # sparse version: v0.6.4-66-g0196afe1
        # https://github.com/intel-lab-lkp/linux/commit/4f7d66c36927c58753175f304fb7f35ef9cfb482
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Claudiu/soc-renesas-rz-sysc-Add-syscon-regmap-support/20250530-192256
        git checkout 4f7d66c36927c58753175f304fb7f35ef9cfb482
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        ~/lkp-tests/kbuild/make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__ -fmax-errors=unlimited -fmax-warnings=unlimited' O=build_dir ARCH=mips olddefconfig
        ~/lkp-tests/kbuild/make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__ -fmax-errors=unlimited -fmax-warnings=unlimited' O=build_dir ARCH=mips SHELL=/bin/bash drivers/pci/controller/