diff --git a/fs/smb/client/file.c b/fs/smb/client/file.c
index 4cbb5487bd8d..043bee4020a9 100644
--- a/fs/smb/client/file.c
+++ b/fs/smb/client/file.c
@@ -2709,8 +2709,7 @@ static void cifs_extend_writeback(struct address_space *mapping,
 			 */
 			if (!folio_clear_dirty_for_io(folio))
 				WARN_ON(1);
-			if (folio_start_writeback(folio))
-				WARN_ON(1);
+			folio_start_writeback(folio);
 
 			*_count -= folio_nr_pages(folio);
 			folio_unlock(folio);
@@ -2745,8 +2744,7 @@ static ssize_t cifs_write_back_from_locked_folio(struct address_space *mapping,
 	int rc;
 
 	/* The folio should be locked, dirty and not undergoing writeback. */
-	if (folio_start_writeback(folio))
-		WARN_ON(1);
+	folio_start_writeback(folio);
 
 	count -= folio_nr_pages(folio);
 	len = folio_size(folio);