reproduce (this is a W=1 build):
        # https://github.com/masneyb/linux/commit/5a0c0093987c56686827652d980784eb850c5868
        git remote add masneyb https://github.com/masneyb/linux
        git fetch --no-tags masneyb b4/clk-rate-negotiation
        git checkout 5a0c0093987c56686827652d980784eb850c5868
        # 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