Re: [PATCH v2 1/3] iomap: pass blocksize to iomap_truncate_page()

[kernel test robot]

Hi Zhang,

kernel test robot noticed the following build warnings:

[auto build test WARNING on brauner-vfs/vfs.all]
[also build test WARNING on linus/master v6.9 next-20240516]
[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/Zhang-Yi/iomap-pass-blocksize-to-iomap_truncate_page/20240516-154238
base:   https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git vfs.all
patch link:    https://lore.kernel.org/r/20240516073001.1066373-2-yi.zhang%40huaweicloud.com
patch subject: [PATCH v2 1/3] iomap: pass blocksize to iomap_truncate_page()
config: arm-davinci_all_defconfig (https://download.01.org/0day-ci/archive/20240517/202405170356.gLrF2NDl-lkp@xxxxxxxxx/config)
compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project d3455f4ddd16811401fa153298fadd2f59f6914e)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240517/202405170356.gLrF2NDl-lkp@xxxxxxxxx/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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202405170356.gLrF2NDl-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

   In file included from fs/iomap/buffered-io.c:9:
   In file included from include/linux/iomap.h:7:
   In file included from include/linux/blk_types.h:10:
   In file included from include/linux/bvec.h:10:
   In file included from include/linux/highmem.h:8:
   In file included from include/linux/cacheflush.h:5:
   In file included from arch/arm/include/asm/cacheflush.h:10:
   In file included from include/linux/mm.h:2210:
   include/linux/vmstat.h:522:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     522 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
>> fs/iomap/buffered-io.c:1453:7: warning: comparison of distinct pointer types ('typeof ((pos)) *' (aka 'long long *') and 'uint64_t *' (aka 'unsigned long long *')) [-Wcompare-distinct-pointer-types]
    1453 |                            do_div(pos, blocksize);
         |                            ^~~~~~~~~~~~~~~~~~~~~~
   include/asm-generic/div64.h:222:28: note: expanded from macro 'do_div'
     222 |         (void)(((typeof((n)) *)0) == ((uint64_t *)0));  \
         |                ~~~~~~~~~~~~~~~~~~ ^  ~~~~~~~~~~~~~~~
   2 warnings generated.


vim +1453 fs/iomap/buffered-io.c

  1446	
  1447	int
  1448	iomap_truncate_page(struct inode *inode, loff_t pos, unsigned int blocksize,
  1449			bool *did_zero, const struct iomap_ops *ops)
  1450	{
  1451		loff_t start = pos;
  1452		unsigned int off = is_power_of_2(blocksize) ? (pos & (blocksize - 1)) :
> 1453				   do_div(pos, blocksize);
  1454	
  1455		/* Block boundary? Nothing to do */
  1456		if (!off)
  1457			return 0;
  1458		return iomap_zero_range(inode, start, blocksize - off, did_zero, ops);
  1459	}
  1460	EXPORT_SYMBOL_GPL(iomap_truncate_page);
  1461	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki