reproduce (this is a W=1 build):
        # https://github.com/nunojsa/linux/commit/67d89797e6b7e313f93f3683f7dd0479895ee9b0
        git remote add nsa https://github.com/nunojsa/linux
        git fetch --no-tags nsa xlnx/fix/buf-mmap-multibuffer
        git checkout 67d89797e6b7e313f93f3683f7dd0479895ee9b0

        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests

        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-16.1.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=csky olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-16.1.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=csky SHELL=/bin/bash drivers/clk/