[PATCH v4 4/4] PCI: keystone: Add support to build as a loadable module

[kernel test robot]

Hi Siddharth,

kernel test robot noticed the following build errors:

[auto build test ERROR on pci/next]
[also build test ERROR on pci/for-linus linus/master v6.18-rc3 next-20251027]
[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/Siddharth-Vadapalli/PCI-Export-pci_get_host_bridge_device-for-use-by-pci-keystone/20251022-180213
base:   https://git.kernel.org/pub/scm/linux/kernel/git/pci/pci.git next
patch link:    https://lore.kernel.org/r/20251022095724.997218-5-s-vadapalli%40ti.com
patch subject: [PATCH v4 4/4] PCI: keystone: Add support to build as a loadable module
config: arm-allmodconfig (https://download.01.org/0day-ci/archive/20251028/202510281008.jw19XuyP-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 15.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251028/202510281008.jw19XuyP-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202510281008.jw19XuyP-lkp@intel.com/

All errors (new ones prefixed by >>, old ones prefixed by <<):

WARNING: modpost: missing MODULE_DESCRIPTION() in arch/arm/probes/kprobes/test-kprobes.o
>> ERROR: modpost: "hook_fault_code" [drivers/pci/controller/dwc/pci-keystone.ko] undefined!
ERROR: modpost: "__ffsdi2" [drivers/spi/spi-amlogic-spifc-a4.ko] undefined!

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