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-rw-r--r--include/linux/journal-head.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/journal-head.h b/include/linux/journal-head.h
index 525aac3..44e95d0 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()]
*/