reproduce:
        # apt-get install sparse
        # sparse version: v0.6.4-52-g1cf3d98c-dirty
        # https://github.com/intel-lab-lkp/linux/commit/3434818f9f818f8538a009cc00fe1d3b8753b616
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review alison-schofield-intel-com/cxl-region-Allow-out-of-order-assembly-of-autodiscovered-regions/20240113-130553
        git checkout 3434818f9f818f8538a009cc00fe1d3b8753b616
        # 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/cxl/core/