reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/djiang/linux.git/commit/?id=477881d6ab1d71be7860a41b4979a5d8817d3caa
        git remote add djiang https://git.kernel.org/pub/scm/linux/kernel/git/djiang/linux.git
        git fetch --no-tags djiang apei-sashiko-fixes
        git checkout 477881d6ab1d71be7860a41b4979a5d8817d3caa

        # 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