return err;
 }
 
-static int f2fs_write_data_page(struct page *page,
+static int __write_data_page(struct page *page,
                                        struct writeback_control *wbc)
 {
        struct inode *inode = page->mapping->host;
        return err;
 }
 
+static int f2fs_write_data_page(struct page *page,
+                                       struct writeback_control *wbc)
+{
+       return __write_data_page(page, wbc);
+}
+
 /*
  * This function was copied from write_cche_pages from mm/page-writeback.c.
  * The major change is making write step of cold data page separately from
                        if (!clear_page_dirty_for_io(page))
                                goto continue_unlock;
 
-                       ret = mapping->a_ops->writepage(page, wbc);
+                       ret = __write_data_page(page, wbc);
                        if (unlikely(ret)) {
                                /*
                                 * keep nr_to_write, since vfs uses this to