reproduce (this is a W=1 build):
        git remote add kees https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git
        git fetch kees for-next/hardening
        git checkout kees/for-next/hardening
        b4 shazam https://lore.kernel.org/r/20250625161221.295575-1-colin.i.king@gmail.com
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=i386 olddefconfig
        make W=1 O=build_dir ARCH=i386 prepare