[nfs:testing 13/40] fs/nfs/dir.c:1414: undefined reference to `nfs4_inode_return_delegation'

[nfs:testing 13/40] fs/nfs/dir.c:1414: undefined reference to `nfs4_inode_return_delegation'

[kbuild test robot]

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tree:   git://git.linux-nfs.org/projects/trondmy/linux-nfs.git testing
head:   168d4f8633f3fc0fdd9f3f062dec089e387fed4e
commit: fb9dac8f3c87cc122d9a05037fc0806f8180e355 [13/40] NFSv4: Fix sillyrename to return the delegation when appropriate
config: i386-randconfig-s1-201821 (attached as .config)
compiler: gcc-6 (Debian 6.4.0-9) 6.4.0 20171026
reproduce:
        git checkout fb9dac8f3c87cc122d9a05037fc0806f8180e355
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   fs/nfs/dir.o: In function `nfs4_dentry_iput':
>> fs/nfs/dir.c:1414: undefined reference to `nfs4_inode_return_delegation'
>> fs/nfs/dir.c:1416: undefined reference to `nfs4_inode_make_writeable'

vim +1414 fs/nfs/dir.c

  1401	
  1402	/*
  1403	 * Called when the dentry loses inode.
  1404	 * We use it to clean up silly-renamed files.
  1405	 */
  1406	static void nfs4_dentry_iput(struct dentry *dentry, struct inode *inode)
  1407	{
  1408		if (S_ISDIR(inode->i_mode))
  1409			/* drop any readdir cache as it could easily be old */
  1410			NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA;
  1411	
  1412		if (dentry->d_flags & DCACHE_NFSFS_RENAMED) {
  1413			if (inode->i_nlink == 1)
> 1414				nfs4_inode_return_delegation(inode);
  1415			else
> 1416				nfs4_inode_make_writeable(inode);
  1417			nfs_complete_unlink(dentry, inode);
  1418			nfs_drop_nlink(inode);
  1419		}
  1420		iput(inode);
  1421	}
  1422	

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