reproduce (this is a W=1 build):
        # https://github.com/sean-jc/linux/commit/3e6566e776aa77ac22ffb4bd16fca9e9afc9d98c
        git remote add sean-jc https://github.com/sean-jc/linux
        git fetch --no-tags sean-jc x86/vmxon_sucks
        git checkout 3e6566e776aa77ac22ffb4bd16fca9e9afc9d98c

        # 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