[linux-nvdimm:libnvdimm-fixes 1/2] drivers/md/dm-table.c:866: undefined reference to `dax_read_lock'

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

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm.git libnvdimm-fixes
head:   3305ce9e90c8f1fefdf75acfbb814574c12bfcc5
commit: ec5f196ad972cd740bcbe6ef9c89a8a92d54ba44 [1/2] dm: Call proper helper to determine dax support
config: openrisc-randconfig-r022-20200918 (attached as .config)
compiler: or1k-linux-gcc (GCC) 9.3.0
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
        git checkout ec5f196ad972cd740bcbe6ef9c89a8a92d54ba44
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=openrisc 

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

All errors (new ones prefixed by >>):

   or1k-linux-ld: drivers/md/dm-table.o: in function `device_supports_dax':
>> drivers/md/dm-table.c:866: undefined reference to `dax_read_lock'
   drivers/md/dm-table.c:866:(.text+0x84c): relocation truncated to fit: R_OR1K_INSN_REL_26 against undefined symbol `dax_read_lock'
>> or1k-linux-ld: drivers/md/dm-table.c:868: undefined reference to `dax_read_unlock'
   drivers/md/dm-table.c:868:(.text+0x854): relocation truncated to fit: R_OR1K_INSN_REL_26 against undefined symbol `dax_read_unlock'

# https://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm.git/commit/?id=ec5f196ad972cd740bcbe6ef9c89a8a92d54ba44
git remote add linux-nvdimm https://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm.git
git fetch --no-tags linux-nvdimm libnvdimm-fixes
git checkout ec5f196ad972cd740bcbe6ef9c89a8a92d54ba44
vim +866 drivers/md/dm-table.c

   858	
   859	/* validate the dax capability of the target device span */
   860	int device_supports_dax(struct dm_target *ti, struct dm_dev *dev,
   861				sector_t start, sector_t len, void *data)
   862	{
   863		int blocksize = *(int *) data, id;
   864		bool rc;
   865	
 > 866		id = dax_read_lock();
   867		rc = dax_supported(dev->dax_dev, dev->bdev, blocksize, start, len);
 > 868		dax_read_unlock(id);
   869	
   870		return rc;
   871	}
   872	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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