reproduce (this is a W=1 build):
        git checkout 05f7e89ab9731565d8a62e3b5d1ec206485eeb0b
        b4 shazam https://lore.kernel.org/r/20260212-vfio_pci_ism-v1-1-333262ade074@linux.ibm.com

        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=$HOME/0day COMPILER=gcc-11.5.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=riscv olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.5.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash drivers/vfio/pci/nvgrace-gpu/