drivers/vfio/vfio.o: warning: objtool: __vfio_register_dev()+0x11e: unreachable instruction

drivers/vfio/vfio.o: warning: objtool: __vfio_register_dev()+0x11e: unreachable instruction

[kernel test robot]

CC: linux-kernel@vger.kernel.org
TO: Christoph Hellwig <hch@lst.de>
CC: Alex Williamson <alex.williamson@redhat.com>
CC: Kevin Tian <kevin.tian@intel.com>

Hi Christoph,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   86799cdfbcd2308cbad6c1dc983b81595b77b639
commit: c68ea0d00ad82428154aed890ec9f793e460fa1c vfio: simplify iommu group allocation for mediated devices
date:   8 weeks ago
config: x86_64-buildonly-randconfig-r002-20211011 (https://download.01.org/0day-ci/archive/20211128/202111280659.6gtCe6hx-lkp@intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project c3dcf39554dbea780d6cb7e12239451ba47a2668)
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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c68ea0d00ad82428154aed890ec9f793e460fa1c
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout c68ea0d00ad82428154aed890ec9f793e460fa1c
        # 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/ fs// mm//

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_register_dev()+0x11e: unreachable instruction

---
0-DAY CI Kernel Test Service, Intel Corporation
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