[PATCH v2 12/22] mm: Export writeback_iter()

[David Howells]

Export writeback_iter() so that it can be used by netfslib as a module.

Signed-off-by: David Howells <dhowe...@redhat.com>
Reviewed-by: Jeff Layton <jlay...@kernel.org>
cc: Matthew Wilcox (Oracle) <wi...@infradead.org>
cc: Christoph Hellwig <h...@lst.de>
cc: linux...@kvack.org
---

Notes:
    Changes
    =======
    ver #2)
     - Mark the symbol _GPL.

 mm/page-writeback.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 3e19b87049db..06fc89d981e8 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -2546,6 +2546,7 @@ struct folio *writeback_iter(struct address_space 
*mapping,
        folio_batch_release(&wbc->fbatch);
        return NULL;
 }
+EXPORT_SYMBOL_GPL(writeback_iter);
 
 /**
  * write_cache_pages - walk the list of dirty pages of the given address space 
and write all of them.