reproduce (this is a W=1 build):
        # https://github.com/isilence/linux/commit/41ada073d96d3d3d8d45adc27deb8c6f86451ec7
        git remote add isilence https://github.com/isilence/linux
        git fetch --no-tags isilence zcrx/david-ifq-sharing
        git checkout 41ada073d96d3d3d8d45adc27deb8c6f86451ec7

        # 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