ubifs: Convert from writepage to writepages

This is a simplistic conversion to separate out any effects of
no longer having a writepage method.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: Richard Weinberger <richard@nod.at>

fs/ubifs/file.c

@@ -1001,8 +1001,10 @@ static int do_writepage(struct page *page, int len)
  * on the page lock and it would not write the truncated inode node to the
  * journal before we have finished.
  */
-static int ubifs_writepage(struct page *page, struct writeback_control *wbc)
+static int ubifs_writepage(struct folio *folio, struct writeback_control *wbc,
+		void *data)
 {
+	struct page *page = &folio->page;
 	struct inode *inode = page->mapping->host;
 	struct ubifs_info *c = inode->i_sb->s_fs_info;
 	struct ubifs_inode *ui = ubifs_inode(inode);
@@ -1074,6 +1076,12 @@ static int ubifs_writepage(struct page *page, struct writeback_control *wbc)
 	return err;
 }
 
+static int ubifs_writepages(struct address_space *mapping,
+		struct writeback_control *wbc)
+{
+	return write_cache_pages(mapping, wbc, ubifs_writepage, NULL);
+}
+
 /**
  * do_attr_changes - change inode attributes.
  * @inode: inode to change attributes for
@@ -1643,7 +1651,7 @@ static int ubifs_symlink_getattr(struct mnt_idmap *idmap,
 
 const struct address_space_operations ubifs_file_address_operations = {
 	.read_folio     = ubifs_read_folio,
-	.writepage      = ubifs_writepage,
+	.writepages     = ubifs_writepages,
 	.write_begin    = ubifs_write_begin,
 	.write_end      = ubifs_write_end,
 	.invalidate_folio = ubifs_invalidate_folio,