[kdave-btrfs-devel:for-next-20201030 14967/14978] fs/btrfs/extent_io.c:5340: undefined reference to `__udivdi3'

[kdave-btrfs-devel:for-next-20201030 14967/14978] fs/btrfs/extent_io.c:5340: undefined reference to `__udivdi3'

[kernel test robot]

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tree:   https://github.com/kdave/btrfs-devel.git for-next-20201030
head:   757db2d191a0eb51ffb9acf023e31393d731b0a9
commit: 3cfe69783beda44e47a06054dcae9ba6bafa1106 [14967/14978] btrfs: extent_io: make btrfs_fs_info::buffer_radix to take sector size devided values
config: i386-randconfig-a014-20201030 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce (this is a W=1 build):
        # https://github.com/kdave/btrfs-devel/commit/3cfe69783beda44e47a06054dcae9ba6bafa1106
        git remote add kdave-btrfs-devel https://github.com/kdave/btrfs-devel.git
        git fetch --no-tags kdave-btrfs-devel for-next-20201030
        git checkout 3cfe69783beda44e47a06054dcae9ba6bafa1106
        # save the attached .config to linux build tree
        make W=1 ARCH=i386 

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 >>):

   ld: fs/btrfs/extent_io.o: in function `release_extent_buffer':
>> fs/btrfs/extent_io.c:5340: undefined reference to `__udivdi3'
   ld: fs/btrfs/extent_io.o: in function `find_extent_buffer':
   fs/btrfs/extent_io.c:5124: undefined reference to `__udivdi3'
   ld: fs/btrfs/extent_io.o: in function `alloc_extent_buffer':
   fs/btrfs/extent_io.c:5284: undefined reference to `__udivdi3'

vim +5340 fs/btrfs/extent_io.c

  5325	
  5326	static int release_extent_buffer(struct extent_buffer *eb)
  5327		__releases(&eb->refs_lock)
  5328	{
  5329		lockdep_assert_held(&eb->refs_lock);
  5330	
  5331		WARN_ON(atomic_read(&eb->refs) == 0);
  5332		if (atomic_dec_and_test(&eb->refs)) {
  5333			if (test_and_clear_bit(EXTENT_BUFFER_IN_TREE, &eb->bflags)) {
  5334				struct btrfs_fs_info *fs_info = eb->fs_info;
  5335	
  5336				spin_unlock(&eb->refs_lock);
  5337	
  5338				spin_lock(&fs_info->buffer_lock);
  5339				radix_tree_delete(&fs_info->buffer_radix,
> 5340						  eb->start / fs_info->sectorsize);
  5341				spin_unlock(&fs_info->buffer_lock);
  5342			} else {
  5343				spin_unlock(&eb->refs_lock);
  5344			}
  5345	
  5346			btrfs_leak_debug_del(&eb->fs_info->eb_leak_lock, &eb->leak_list);
  5347			/* Should be safe to release our pages at this point */
  5348			btrfs_release_extent_buffer_pages(eb);
  5349	#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
  5350			if (unlikely(test_bit(EXTENT_BUFFER_UNMAPPED, &eb->bflags))) {
  5351				__free_extent_buffer(eb);
  5352				return 1;
  5353			}
  5354	#endif
  5355			call_rcu(&eb->rcu_head, btrfs_release_extent_buffer_rcu);
  5356			return 1;
  5357		}
  5358		spin_unlock(&eb->refs_lock);
  5359	
  5360		return 0;
  5361	}
  5362	

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

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