[willy-pagecache:headers 17/18] fs/nfs/pnfs.c:1508:2: error: call to undeclared function 'filemap_fdatawait'; ISO C99 and later do not support implicit function declarations

[willy-pagecache:headers 17/18] fs/nfs/pnfs.c:1508:2: error: call to undeclared function 'filemap_fdatawait'; ISO C99 and later do not support implicit function declarations

[kernel test robot]

tree:   git://git.infradead.org/users/willy/pagecache headers
head:   33e73a1e8175a4735e962dec9465e64e85d0a63d
commit: 7191691f80efdfec4c2f8d87da800a18b7753e08 [17/18] nfs: Remove pagemap.h from includes
config: loongarch-defconfig (https://download.01.org/0day-ci/archive/20260814/202608142241.oTd7Tj14-lkp@intel.com/config)
compiler: clang version 24.0.0git (https://github.com/llvm/llvm-project 844a18e753e822736c9805ab779144b647a2c186)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260814/202608142241.oTd7Tj14-lkp@intel.com/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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202608142241.oTd7Tj14-lkp@intel.com/

All errors (new ones prefixed by >>):

>> fs/nfs/pnfs.c:1508:2: error: call to undeclared function 'filemap_fdatawait'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    1508 |         filemap_fdatawait(inode->i_mapping);
         |         ^
   1 error generated.
--
>> fs/nfs/nfs42proc.c:398:15: error: call to undeclared function 'invalidate_inode_pages2_range'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     398 |         WARN_ON_ONCE(invalidate_inode_pages2_range(mapping, pos >> PAGE_SHIFT,
         |                      ^
   fs/nfs/nfs42proc.c:398:15: note: did you mean 'truncate_inode_pages_range'?
   include/linux/mm.h:4317:6: note: 'truncate_inode_pages_range' declared here
    4317 | void truncate_inode_pages_range(struct address_space *mapping, loff_t lstart,
         |      ^
   1 error generated.
--
>> fs/nfsd/nfs4proc.c:2015:13: error: call to undeclared function 'filemap_check_wb_err'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    2015 |                         status = filemap_check_wb_err(dst->f_mapping, since);
         |                                  ^
   1 error generated.
--
>> fs/nfs/blocklayout/blocklayout.c:894:9: error: call to undeclared function 'page_cache_next_miss'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     894 |                 end = page_cache_next_miss(mapping, idx + 1, ULONG_MAX);
         |                       ^
   1 error generated.


vim +/filemap_fdatawait +1508 fs/nfs/pnfs.c

cbe8260369c9f8 Benny Halevy    2011-05-22  1491  
240286725d8543 Trond Myklebust 2013-03-20  1492  int
240286725d8543 Trond Myklebust 2013-03-20  1493  pnfs_commit_and_return_layout(struct inode *inode)
240286725d8543 Trond Myklebust 2013-03-20  1494  {
240286725d8543 Trond Myklebust 2013-03-20  1495  	struct pnfs_layout_hdr *lo;
240286725d8543 Trond Myklebust 2013-03-20  1496  	int ret;
240286725d8543 Trond Myklebust 2013-03-20  1497  
240286725d8543 Trond Myklebust 2013-03-20  1498  	spin_lock(&inode->i_lock);
240286725d8543 Trond Myklebust 2013-03-20  1499  	lo = NFS_I(inode)->layout;
240286725d8543 Trond Myklebust 2013-03-20  1500  	if (lo == NULL) {
240286725d8543 Trond Myklebust 2013-03-20  1501  		spin_unlock(&inode->i_lock);
240286725d8543 Trond Myklebust 2013-03-20  1502  		return 0;
240286725d8543 Trond Myklebust 2013-03-20  1503  	}
240286725d8543 Trond Myklebust 2013-03-20  1504  	pnfs_get_layout_hdr(lo);
240286725d8543 Trond Myklebust 2013-03-20  1505  	/* Block new layoutgets and read/write to ds */
240286725d8543 Trond Myklebust 2013-03-20  1506  	lo->plh_block_lgets++;
240286725d8543 Trond Myklebust 2013-03-20  1507  	spin_unlock(&inode->i_lock);
240286725d8543 Trond Myklebust 2013-03-20 @1508  	filemap_fdatawait(inode->i_mapping);
240286725d8543 Trond Myklebust 2013-03-20  1509  	ret = pnfs_layoutcommit_inode(inode, true);
240286725d8543 Trond Myklebust 2013-03-20  1510  	if (ret == 0)
240286725d8543 Trond Myklebust 2013-03-20  1511  		ret = _pnfs_return_layout(inode);
240286725d8543 Trond Myklebust 2013-03-20  1512  	spin_lock(&inode->i_lock);
240286725d8543 Trond Myklebust 2013-03-20  1513  	lo->plh_block_lgets--;
240286725d8543 Trond Myklebust 2013-03-20  1514  	spin_unlock(&inode->i_lock);
240286725d8543 Trond Myklebust 2013-03-20  1515  	pnfs_put_layout_hdr(lo);
240286725d8543 Trond Myklebust 2013-03-20  1516  	return ret;
240286725d8543 Trond Myklebust 2013-03-20  1517  }
240286725d8543 Trond Myklebust 2013-03-20  1518  

:::::: The code at line 1508 was first introduced by commit
:::::: 240286725d854331422cb15957f8d9bf2741d4e3 NFSv4.1: Add a helper pnfs_commit_and_return_layout

:::::: TO: Trond Myklebust <Trond.Myklebust@netapp.com>
:::::: CC: Trond Myklebust <Trond.Myklebust@netapp.com>

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https://github.com/intel/lkp-tests/wiki