1 files changed, 8 insertions, 2 deletions

diff --git a/include/linux/writeback.h b/include/linux/writeback.h
index daa6c125f66e..050915b59576 100644
--- a/include/linux/writeback.h
+++ b/include/linux/writeback.h
@@ -111,9 +111,15 @@ balance_dirty_pages_ratelimited(struct address_space *mapping)
         balance_dirty_pages_ratelimited_nr(mapping, 1);
 }
 
+typedef int (*writepage_t)(struct page *page, struct writeback_control *wbc,
+                                void *data);
+
 int pdflush_operation(void (*fn)(unsigned long), unsigned long arg0);
-extern int generic_writepages(struct address_space *mapping,
-                              struct writeback_control *wbc);
+int generic_writepages(struct address_space *mapping,
+                       struct writeback_control *wbc);
+int write_cache_pages(struct address_space *mapping,
+                      struct writeback_control *wbc, writepage_t writepage,
+                      void *data);
 int do_writepages(struct address_space *mapping, struct writeback_control *wbc);
 int sync_page_range(struct inode *inode, struct address_space *mapping,
                         loff_t pos, loff_t count);