reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/conor/linux.git/commit/?id=a12f281d2cb869bcd9a6ffc45d0c6a0d3aa2e9e2
        git remote add conor https://git.kernel.org/pub/scm/linux/kernel/git/conor/linux.git
        git fetch --no-tags conor clk-reset-stuff
        git checkout a12f281d2cb869bcd9a6ffc45d0c6a0d3aa2e9e2
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=um olddefconfig
        make W=1 O=build_dir ARCH=um SHELL=/bin/bash drivers/