Hi Lei,

[FYI, it's a private test report for your RFC patch.]
[auto build test WARNING on awilliam-vfio/for-linus]
[also build test WARNING on linus/master v6.1-rc8 next-20221206]
[cannot apply to awilliam-vfio/next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Lei-Rao/Add-new-VFIO-PCI-driver-for-NVMe-devices/20221206-135959
base:   https://github.com/awilliam/linux-vfio.git for-linus
patch link:    https://lore.kernel.org/r/20221206055816.292304-2-lei.rao%40intel.com
patch subject: [RFC PATCH 1/5] nvme-pci: add function nvme_submit_vf_cmd to issue admin commands for VF driver.
config: ia64-allyesconfig
compiler: ia64-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/intel-lab-lkp/linux/commit/d2d8886a23a91021f6ae8e6df99e9398376b9de2
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Lei-Rao/Add-new-VFIO-PCI-driver-for-NVMe-devices/20221206-135959
        git checkout d2d8886a23a91021f6ae8e6df99e9398376b9de2
        # 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=ia64 SHELL=/bin/bash drivers/nvme/

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

All warnings (new ones prefixed by >>):

>> drivers/nvme/host/pci.c:3584:5: warning: no previous prototype for 'nvme_submit_vf_cmd' [-Wmissing-prototypes]
    3584 | int nvme_submit_vf_cmd(struct pci_dev *dev, struct nvme_command *cmd,
         |     ^~~~~~~~~~~~~~~~~~


vim +/nvme_submit_vf_cmd +3584 drivers/nvme/host/pci.c

  3583	
> 3584	int nvme_submit_vf_cmd(struct pci_dev *dev, struct nvme_command *cmd,
  3585				      size_t *result, void *buffer, unsigned int bufflen)
  3586	{
  3587		struct nvme_dev *ndev = NULL;
  3588		union nvme_result res = { };
  3589		int ret;
  3590	
  3591		ndev = pci_iov_get_pf_drvdata(dev, &nvme_driver);
  3592		if (IS_ERR(ndev))
  3593			return PTR_ERR(ndev);
  3594		ret = __nvme_submit_sync_cmd(ndev->ctrl.admin_q, cmd, &res, buffer, bufflen,
  3595				      NVME_QID_ANY, 0, 0);
  3596		if (ret >= 0 && result)
  3597			*result = le32_to_cpu(res.u32);
  3598		return ret;
  3599	}
  3600	EXPORT_SYMBOL_GPL(nvme_submit_vf_cmd);
  3601	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp