reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/d05202b07b194252069991dde5cae5fe37df7e75
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review UPDATE-20261023-132215/NeilBrown/nfs-fix-open-blocking-with-d_fsdata/20261023-125011
        git checkout d05202b07b194252069991dde5cae5fe37df7e75

        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/nfs/