reproduce (this is a W=1 build):
        # https://github.com/sean-jc/linux/commit/2394190a1f9102c9e202b18f8b851e3b5f04e620
        git remote add sean-jc https://github.com/sean-jc/linux
        git fetch --no-tags sean-jc slf/nested_sti_blocking
        git checkout 2394190a1f9102c9e202b18f8b851e3b5f04e620
        # 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