[jgunthorpe:vfio_iommufd 25/29] drivers/vfio/vfio_main.c:600: undefined reference to `iommufd_vfio_compat_ioas_id'

[kernel test robot <lkp@intel.com>]

tree:   https://github.com/jgunthorpe/linux vfio_iommufd
head:   d2ab4343c9f524e9404059830828188b0f8a15b6
commit: 41be72284fea27e79bd85a42d1967b13d7f26147 [25/29] vfio-iommufd: Allow iommufd to be used in place of a container fd
config: microblaze-randconfig-r001-20220820 (https://download.01.org/0day-ci/archive/20220820/202208201310.oYoCaywG-lkp@intel.com/config)
compiler: microblaze-linux-gcc (GCC) 12.1.0
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/41be72284fea27e79bd85a42d1967b13d7f26147
        git remote add jgunthorpe https://github.com/jgunthorpe/linux
        git fetch --no-tags jgunthorpe vfio_iommufd
        git checkout 41be72284fea27e79bd85a42d1967b13d7f26147
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=microblaze SHELL=/bin/bash

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

All errors (new ones prefixed by >>):

   microblaze-linux-ld: drivers/vfio/vfio_main.o: in function `vfio_group_ioctl_set_container':
>> drivers/vfio/vfio_main.c:600: undefined reference to `iommufd_vfio_compat_ioas_id'


vim +600 drivers/vfio/vfio_main.c

   568	
   569	static int vfio_group_ioctl_set_container(struct vfio_group *group,
   570						  int __user *arg)
   571	{
   572		struct vfio_container *container;
   573		struct iommufd_ctx *iommufd;
   574		struct fd f;
   575		int ret = -EINVAL;
   576		int fd;
   577	
   578		if (get_user(fd, arg))
   579			return -EFAULT;
   580	
   581		f = fdget(fd);
   582		if (!f.file)
   583			return -EBADF;
   584	
   585		down_write(&group->group_rwsem);
   586		if (vfio_group_has_container(group))
   587			goto out_unlock;
   588	
   589		container = vfio_container_from_file(f.file);
   590		if (container) {
   591			ret = vfio_container_attach_group(group, container);
   592			goto out_unlock;
   593		}
   594	
   595		iommufd = iommufd_ctx_from_file(f.file);
   596		if (!IS_ERR(iommufd)) {
   597			u32 ioas_id;
   598	
   599			group->iommufd = iommufd;
 > 600			ret = iommufd_vfio_compat_ioas_id(iommufd, &ioas_id);
   601			goto out_unlock;
   602		}
   603	
   604	out_unlock:
   605		up_write(&group->group_rwsem);
   606		fdput(f);
   607		return ret;
   608	}
   609	

-- 
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https://01.org/lkp