diff --git a/include/linux/journal-head.h b/include/linux/journal-head.h
index 525aac3c97df..44e95d0a721f 100644
--- a/include/linux/journal-head.h
+++ b/include/linux/journal-head.h
@@ -40,6 +40,13 @@ struct journal_head {
 	 */
 	unsigned b_modified;
 
+	/*
+	 * This feild tracks the last transaction id in which this buffer
+	 * has been cowed
+	 * [jbd_lock_bh_state()]
+	 */
+	unsigned b_cow_tid;
+
 	/*
 	 * Copy of the buffer data frozen for writing to the log.
 	 * [jbd_lock_bh_state()]