[linyunsheng:page_bulk_alloc_opt 1/1] fs/xfs/xfs_buf.c:382:57: error: use of undeclared identifier 'refill'

[kernel test robot <lkp@intel.com>]

tree:   https://github.com/gestionlin/linux.git page_bulk_alloc_opt
head:   a4f123e5e9347f8f9302bcc6b0a05c8a5a9ff4b8
commit: a4f123e5e9347f8f9302bcc6b0a05c8a5a9ff4b8 [1/1] mm: alloc_pages_bulk: remove assumption of populating only NULL elements
config: s390-randconfig-001-20250216 (https://download.01.org/0day-ci/archive/20250217/202502170011.yexpDjyi-lkp@intel.com/config)
compiler: clang version 19.1.3 (https://github.com/llvm/llvm-project ab51eccf88f5321e7c60591c5546b254b6afab99)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250217/202502170011.yexpDjyi-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/202502170011.yexpDjyi-lkp@intel.com/

All errors (new ones prefixed by >>):

>> fs/xfs/xfs_buf.c:382:57: error: use of undeclared identifier 'refill'
     382 |                 alloc = alloc_pages_bulk(gfp_mask, bp->b_page_count - refill,
         |                                                                       ^
   fs/xfs/xfs_buf.c:383:21: error: use of undeclared identifier 'refill'
     383 |                                          bp->b_pages + refill);
         |                                                        ^
>> fs/xfs/xfs_buf.c:382:57: error: use of undeclared identifier 'refill'
     382 |                 alloc = alloc_pages_bulk(gfp_mask, bp->b_page_count - refill,
         |                                                                       ^
   fs/xfs/xfs_buf.c:383:21: error: use of undeclared identifier 'refill'
     383 |                                          bp->b_pages + refill);
         |                                                        ^
>> fs/xfs/xfs_buf.c:382:57: error: use of undeclared identifier 'refill'
     382 |                 alloc = alloc_pages_bulk(gfp_mask, bp->b_page_count - refill,
         |                                                                       ^
   fs/xfs/xfs_buf.c:383:21: error: use of undeclared identifier 'refill'
     383 |                                          bp->b_pages + refill);
         |                                                        ^
   fs/xfs/xfs_buf.c:384:3: error: use of undeclared identifier 'refill'
     384 |                 refill += alloc;
         |                 ^
   7 errors generated.


vim +/refill +382 fs/xfs/xfs_buf.c

   346	
   347	static int
   348	xfs_buf_alloc_pages(
   349		struct xfs_buf	*bp,
   350		xfs_buf_flags_t	flags)
   351	{
   352		gfp_t		gfp_mask = GFP_KERNEL | __GFP_NOLOCKDEP | __GFP_NOWARN;
   353		long		filled = 0;
   354	
   355		if (flags & XBF_READ_AHEAD)
   356			gfp_mask |= __GFP_NORETRY;
   357	
   358		/* Make sure that we have a page list */
   359		bp->b_page_count = DIV_ROUND_UP(BBTOB(bp->b_length), PAGE_SIZE);
   360		if (bp->b_page_count <= XB_PAGES) {
   361			bp->b_pages = bp->b_page_array;
   362		} else {
   363			bp->b_pages = kzalloc(sizeof(struct page *) * bp->b_page_count,
   364						gfp_mask);
   365			if (!bp->b_pages)
   366				return -ENOMEM;
   367		}
   368		bp->b_flags |= _XBF_PAGES;
   369	
   370		/* Assure zeroed buffer for non-read cases. */
   371		if (!(flags & XBF_READ))
   372			gfp_mask |= __GFP_ZERO;
   373	
   374		/*
   375		 * Bulk filling of pages can take multiple calls. Not filling the entire
   376		 * array is not an allocation failure, so don't back off if we get at
   377		 * least one extra page.
   378		 */
   379		for (;;) {
   380			long	alloc;
   381	
 > 382			alloc = alloc_pages_bulk(gfp_mask, bp->b_page_count - refill,
   383						 bp->b_pages + refill);
   384			refill += alloc;
   385			if (filled == bp->b_page_count) {
   386				XFS_STATS_INC(bp->b_mount, xb_page_found);
   387				break;
   388			}
   389	
   390			if (alloc)
   391				continue;
   392	
   393			if (flags & XBF_READ_AHEAD) {
   394				xfs_buf_free_pages(bp);
   395				return -ENOMEM;
   396			}
   397	
   398			XFS_STATS_INC(bp->b_mount, xb_page_retries);
   399			memalloc_retry_wait(gfp_mask);
   400		}
   401		return 0;
   402	}
   403	

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