reproduce (this is a W=1 build):
        git checkout 211ddde0823f1442e4ad052a2f30f050145ccada
        b4 shazam https://lore.kernel.org/r/20251103184804.509762-5-rrichter@amd.com

        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 olddefconfig
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/cxl/core/