reproduce (this is a W=1 build):
        git checkout 6de23f81a5e08be8fbf5e8d7e9febc72a5b5f27f
        b4 shazam https://lore.kernel.org/r/20260226-revert-cpu-read-lock-v1-1-eb005072566e@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