1 files changed, 7 insertions, 0 deletions

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
@@ -41,6 +41,13 @@ 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()]
          */