reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/0ee3a30c51b6df9d40444e59dde79947e9be7e09
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Daniel-Drake/generic_pt-allow-missing-sw-bit-in-DMA_INCOHERENT-case/20260728-104924
        git checkout 0ee3a30c51b6df9d40444e59dde79947e9be7e09

        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 drivers/