Hi Shiyang,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on linux/master]
[also build test ERROR on linus/master v5.17-rc1 next-20220127]
[cannot apply to xfs-linux/for-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]

url:    
https://github.com/0day-ci/linux/commits/Shiyang-Ruan/fsdax-introduce-fs-query-to-support-reflink/20220127-204239
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 
2c271fe77d52a0555161926c232cd5bc07178b39
config: ia64-defconfig 
(https://download.01.org/0day-ci/archive/20220128/202201280314.si8wtlft-...@intel.com/config)
compiler: ia64-linux-gcc (GCC) 11.2.0
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/0day-ci/linux/commit/cb7650562991fc273fbf4c53b6e3db4bb9bb0b5e
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review 
Shiyang-Ruan/fsdax-introduce-fs-query-to-support-reflink/20220127-204239
        git checkout cb7650562991fc273fbf4c53b6e3db4bb9bb0b5e
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross 
O=build_dir ARCH=ia64 SHELL=/bin/bash fs/

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

All errors (new ones prefixed by >>):

   In file included from fs/xfs/xfs_buf.h:14,
                    from fs/xfs/xfs_linux.h:80,
                    from fs/xfs/xfs.h:22,
                    from fs/xfs/xfs_buf.c:6:
   include/linux/dax.h:73:30: warning: 'struct dax_holder_operations' declared 
inside parameter list will not be visible outside of this definition or 
declaration
      73 |                 const struct dax_holder_operations *ops)
         |                              ^~~~~~~~~~~~~~~~~~~~~
   fs/xfs/xfs_buf.c: In function 'xfs_alloc_buftarg':
>> fs/xfs/xfs_buf.c:1959:33: error: passing argument 3 of 'dax_register_holder' 
>> from incompatible pointer type [-Werror=incompatible-pointer-types]
    1959 |                                 &xfs_dax_holder_operations);
         |                                 ^~~~~~~~~~~~~~~~~~~~~~~~~~
         |                                 |
         |                                 const struct dax_holder_operations *
   In file included from fs/xfs/xfs_buf.h:14,
                    from fs/xfs/xfs_linux.h:80,
                    from fs/xfs/xfs.h:22,
                    from fs/xfs/xfs_buf.c:6:
   include/linux/dax.h:73:53: note: expected 'const struct 
dax_holder_operations *' but argument is of type 'const struct 
dax_holder_operations *'
      73 |                 const struct dax_holder_operations *ops)
         |                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
   cc1: some warnings being treated as errors
--
   In file included from fs/xfs/xfs_buf.h:14,
                    from fs/xfs/xfs_linux.h:80,
                    from fs/xfs/xfs.h:22,
                    from fs/xfs/xfs_notify_failure.c:6:
   include/linux/dax.h:73:30: warning: 'struct dax_holder_operations' declared 
inside parameter list will not be visible outside of this definition or 
declaration
      73 |                 const struct dax_holder_operations *ops)
         |                              ^~~~~~~~~~~~~~~~~~~~~
>> fs/xfs/xfs_notify_failure.c:220:14: error: variable 
>> 'xfs_dax_holder_operations' has initializer but incomplete type
     220 | const struct dax_holder_operations xfs_dax_holder_operations = {
         |              ^~~~~~~~~~~~~~~~~~~~~
>> fs/xfs/xfs_notify_failure.c:221:10: error: 'const struct 
>> dax_holder_operations' has no member named 'notify_failure'
     221 |         .notify_failure         = xfs_dax_notify_failure,
         |          ^~~~~~~~~~~~~~
   fs/xfs/xfs_notify_failure.c:221:35: warning: excess elements in struct 
initializer
     221 |         .notify_failure         = xfs_dax_notify_failure,
         |                                   ^~~~~~~~~~~~~~~~~~~~~~
   fs/xfs/xfs_notify_failure.c:221:35: note: (near initialization for 
'xfs_dax_holder_operations')
>> fs/xfs/xfs_notify_failure.c:220:36: error: storage size of 
>> 'xfs_dax_holder_operations' isn't known
     220 | const struct dax_holder_operations xfs_dax_holder_operations = {
         |                                    ^~~~~~~~~~~~~~~~~~~~~~~~~


vim +/dax_register_holder +1959 fs/xfs/xfs_buf.c

  1938  
  1939  struct xfs_buftarg *
  1940  xfs_alloc_buftarg(
  1941          struct xfs_mount        *mp,
  1942          struct block_device     *bdev)
  1943  {
  1944          xfs_buftarg_t           *btp;
  1945  
  1946          btp = kmem_zalloc(sizeof(*btp), KM_NOFS);
  1947  
  1948          btp->bt_mount = mp;
  1949          btp->bt_dev =  bdev->bd_dev;
  1950          btp->bt_bdev = bdev;
  1951          btp->bt_daxdev = fs_dax_get_by_bdev(bdev, 
&btp->bt_dax_part_off);
  1952          if (btp->bt_daxdev) {
  1953                  if (dax_get_holder(btp->bt_daxdev)) {
  1954                          xfs_err(mp, "DAX device already in use?!");
  1955                          goto error_free;
  1956                  }
  1957  
  1958                  dax_register_holder(btp->bt_daxdev, mp,
> 1959                                  &xfs_dax_holder_operations);
  1960          }
  1961  
  1962          /*
  1963           * Buffer IO error rate limiting. Limit it to no more than 10 
messages
  1964           * per 30 seconds so as to not spam logs too much on repeated 
errors.
  1965           */
  1966          ratelimit_state_init(&btp->bt_ioerror_rl, 30 * HZ,
  1967                               DEFAULT_RATELIMIT_BURST);
  1968  
  1969          if (xfs_setsize_buftarg_early(btp, bdev))
  1970                  goto error_free;
  1971  
  1972          if (list_lru_init(&btp->bt_lru))
  1973                  goto error_free;
  1974  
  1975          if (percpu_counter_init(&btp->bt_io_count, 0, GFP_KERNEL))
  1976                  goto error_lru;
  1977  
  1978          btp->bt_shrinker.count_objects = xfs_buftarg_shrink_count;
  1979          btp->bt_shrinker.scan_objects = xfs_buftarg_shrink_scan;
  1980          btp->bt_shrinker.seeks = DEFAULT_SEEKS;
  1981          btp->bt_shrinker.flags = SHRINKER_NUMA_AWARE;
  1982          if (register_shrinker(&btp->bt_shrinker))
  1983                  goto error_pcpu;
  1984          return btp;
  1985  
  1986  error_pcpu:
  1987          percpu_counter_destroy(&btp->bt_io_count);
  1988  error_lru:
  1989          list_lru_destroy(&btp->bt_lru);
  1990  error_free:
  1991          kmem_free(btp);
  1992          return NULL;
  1993  }
  1994  

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

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