[jgunthorpe:iommufd 9/22] drivers/vfio/vfio.o: warning: objtool: vfio_group_fops_open()+0x25d: unreachable instruction

[jgunthorpe:iommufd 9/22] drivers/vfio/vfio.o: warning: objtool: vfio_group_fops_open()+0x25d: unreachable instruction

[kernel test robot]

CC: linux-kernel@vger.kernel.org
TO: Lu Baolu <baolu.lu@linux.intel.com>

tree:   https://github.com/jgunthorpe/linux iommufd
head:   adaf58fcdccd96a03a9d6783e08303612fa3da85
commit: 3a3d6a0db3e73b2fedc75f0a817e73561f27e70e [9/22] vfio: Remove use of vfio_group_viable()
config: x86_64-randconfig-a001-20211204 (https://download.01.org/0day-ci/archive/20211205/202112050732.ao3zKSID-lkp@intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 5f1d1854eb1450d352663ee732235893c5782237)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/jgunthorpe/linux/commit/3a3d6a0db3e73b2fedc75f0a817e73561f27e70e
        git remote add jgunthorpe https://github.com/jgunthorpe/linux
        git fetch --no-tags jgunthorpe iommufd
        git checkout 3a3d6a0db3e73b2fedc75f0a817e73561f27e70e
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> drivers/vfio/vfio.o: warning: objtool: vfio_group_fops_open()+0x25d: unreachable instruction

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org