reproduce (this is a W=1 build):
        # https://github.com/jsarha/linux/commit/68be79a50fc5b8f83378bdd48de9abf9eb9baa66
        git remote add jsarha https://github.com/jsarha/linux
        git fetch --no-tags jsarha debug-stream-debugfs
        git checkout 68be79a50fc5b8f83378bdd48de9abf9eb9baa66
        # 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 sound/soc/sof/