tree:   https://git.kernel.org/pub/scm/linux/kernel/git/djbw/nvdimm.git libnvdimm-pending
head:   911d658201acc386472f976e5fd2d48b9e45fdce
commit: 89b5b3e428107b103c4c71359ec311a35d6de995 [15/20] devdax: add PUD support to the DAX mapping infrastructure
config: x86_64-randconfig-a002
compiler: gcc-11 (Debian 11.3.0-5) 11.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/djbw/nvdimm.git/commit/?id=89b5b3e428107b103c4c71359ec311a35d6de995
        git remote add djbw-nvdimm https://git.kernel.org/pub/scm/linux/kernel/git/djbw/nvdimm.git
        git fetch --no-tags djbw-nvdimm libnvdimm-pending
        git checkout 89b5b3e428107b103c4c71359ec311a35d6de995
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 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 >>):

   ld: drivers/dax/mapping.o: in function `dax_insert_pfn_mkwrite':
>> mapping.c:(.text+0x2925): undefined reference to `vmf_insert_pfn_pud_prot'

-- 
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https://01.org/lkp