reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux.git/commit/?id=1df3ceabbf8e2ce712bb39d8c35941800be52829
        git remote add saeed https://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux.git
        git fetch --no-tags saeed temp/zcrx-mlx5
        git checkout 1df3ceabbf8e2ce712bb39d8c35941800be52829
        # 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