[linux-next:master 3951/5720] drivers/pci/endpoint/functions/pci-epf-vntb.c:1247: undefined reference to `ntb_register_device'

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

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   2f9cb3d3bd73fc2225d66aa8fcffb632ed3eb235
commit: ff32fac00d97661c715ee47bbfd867cae1f3aaf8 [3951/5720] NTB: EPF: support NTB transfer between PCI RC and EP connection
config: parisc-randconfig-c003-20220626
compiler: hppa-linux-gcc (GCC) 11.3.0
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://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=ff32fac00d97661c715ee47bbfd867cae1f3aaf8
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout ff32fac00d97661c715ee47bbfd867cae1f3aaf8
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=parisc 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 >>):

   hppa-linux-ld: drivers/pci/endpoint/functions/pci-epf-vntb.o: in function `pci_vntb_probe':
>> drivers/pci/endpoint/functions/pci-epf-vntb.c:1247: undefined reference to `ntb_register_device'
   hppa-linux-ld: drivers/pci/endpoint/functions/pci-epf-vntb.o: in function `epf_ntb_cmd_handler':
>> drivers/pci/endpoint/functions/pci-epf-vntb.c:262: undefined reference to `ntb_db_event'
   hppa-linux-ld: drivers/pci/endpoint/functions/pci-epf-vntb.o: in function `epf_ntb_link_up':
>> drivers/pci/endpoint/functions/pci-epf-vntb.c:174: undefined reference to `ntb_link_event'


vim +1247 drivers/pci/endpoint/functions/pci-epf-vntb.c

  1230	
  1231	static int pci_vntb_probe(struct pci_dev *pdev, const struct pci_device_id *id)
  1232	{
  1233		int ret;
  1234		struct epf_ntb *ndev = (struct epf_ntb *)pdev->sysdata;
  1235		struct device *dev = &pdev->dev;
  1236	
  1237		ndev->ntb.pdev = pdev;
  1238		ndev->ntb.topo = NTB_TOPO_NONE;
  1239		ndev->ntb.ops =  &vntb_epf_ops;
  1240	
  1241		ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
  1242		if (ret) {
  1243			dev_err(dev, "Cannot set DMA mask\n");
  1244			return -1;
  1245		}
  1246	
> 1247		ret = ntb_register_device(&ndev->ntb);
  1248		if (ret) {
  1249			dev_err(dev, "Failed to register NTB device\n");
  1250			goto err_register_dev;
  1251		}
  1252	
  1253		dev_info(dev, "PCI Virtual NTB driver loaded\n");
  1254		return 0;
  1255	
  1256	err_register_dev:
  1257		return -1;
  1258	}
  1259	

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