reproduce (this is a W=1 build):
        git checkout 6628e7d4c6b25c8d18f1345e3a20d21829aae7e4
        b4 shazam https://lore.kernel.org/r/20261104161632.3547423-12-aneesh.kumar@kernel.org

        # 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/iommu/amd/