reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs.git/commit/?id=107eb175cbc8115811b223f7ea63ca6afa607fe3
        git remote add jack-fs https://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs.git
        git fetch --no-tags jack-fs for_next
        git checkout 107eb175cbc8115811b223f7ea63ca6afa607fe3

        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=$HOME/0day COMPILER=gcc-11.5.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=nios2 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.5.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=nios2 SHELL=/bin/bash fs/udf/