[dm-devel] [PATCH 5/5] dax, iomap: Add helper dax_iomap_zero() to zero a range

[kbuild test robot]

Hi Vivek,

I love your patch! Yet something to improve:

[auto build test ERROR on dm/for-next]
[also build test ERROR on s390/features xfs-linux/for-next linus/master linux-nvdimm/libnvdimm-for-next v5.5 next-20200203]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Vivek-Goyal/dax-pmem-Provide-a-dax-operation-to-zero-range-of-memory/20200204-082750
base:   https://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm.git for-next
config: s390-alldefconfig (attached as .config)
compiler: s390-linux-gcc (GCC) 7.5.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        GCC_VERSION=7.5.0 make.cross ARCH=s390 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp at intel.com>

All errors (new ones prefixed by >>):

>> drivers/s390/block/dcssblk.c:65:21: error: 'dcssblk_dax_zero_page_range' undeclared here (not in a function); did you mean 'generic_dax_zero_page_range'?
     .zero_page_range = dcssblk_dax_zero_page_range,
                        ^~~~~~~~~~~~~~~~~~~~~~~~~~~
                        generic_dax_zero_page_range
   drivers/s390/block/dcssblk.c:945:12: warning: 'dcssblk_dax_zero_page_range' defined but not used [-Wunused-function]
    static int dcssblk_dax_zero_page_range(struct dax_device *dax_dev,pgoff_t pgoff,
               ^~~~~~~~~~~~~~~~~~~~~~~~~~~

vim +65 drivers/s390/block/dcssblk.c

b3a9a0c36e1f7b Dan Williams   2018-05-02  59  
7a2765f6e82063 Dan Williams   2017-01-26  60  static const struct dax_operations dcssblk_dax_ops = {
7a2765f6e82063 Dan Williams   2017-01-26  61  	.direct_access = dcssblk_dax_direct_access,
7bf7eac8d64805 Dan Williams   2019-05-16  62  	.dax_supported = generic_fsdax_supported,
5d61e43b3975c0 Dan Williams   2017-06-27  63  	.copy_from_iter = dcssblk_dax_copy_from_iter,
b3a9a0c36e1f7b Dan Williams   2018-05-02  64  	.copy_to_iter = dcssblk_dax_copy_to_iter,
c5cb636194a0d8 Vivek Goyal    2020-02-03 @65  	.zero_page_range = dcssblk_dax_zero_page_range,
^1da177e4c3f41 Linus Torvalds 2005-04-16  66  };
^1da177e4c3f41 Linus Torvalds 2005-04-16  67  

:::::: The code at line 65 was first introduced by commit
:::::: c5cb636194a0d8d33d549903c92189385db48406 s390,dax: Add dax zero_page_range operation to dcssblk driver

:::::: TO: Vivek Goyal <vgoyal at redhat.com>
:::::: CC: 0day robot <lkp at intel.com>

---
0-DAY kernel test infrastructure                 Open Source Technology Center
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org Intel Corporation
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