reproduce (this is a W=1 build):
        git remote add krzk-mem-ctrl https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux-mem-ctrl.git
        git fetch krzk-mem-ctrl for-next
        git checkout krzk-mem-ctrl/for-next
        b4 shazam https://lore.kernel.org/r/20241210220628.237604-1-linux@treblig.org
        # 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 SHELL=/bin/bash drivers/memory/