reproduce (this is a W=1 build):
        # https://github.com/amir73il/linux/commit/f2b9cb55540b0f2da08380cd369a496542fcb717
        git remote add amir73il https://github.com/amir73il/linux
        git fetch --no-tags amir73il vfs-fixes
        git checkout f2b9cb55540b0f2da08380cd369a496542fcb717

        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 security/apparmor/