diff --git a/include/linux/jbd.h b/include/linux/jbd.h
index 16e7ed8..d9ecd13 100644
--- a/include/linux/jbd.h
+++ b/include/linux/jbd.h
@@ -439,6 +439,8 @@
 	/*
 	 * Transaction's current state
 	 * [no locking - only kjournald alters this]
+	 * [j_list_lock] guards transition of a transaction into T_FINISHED
+	 * state and subsequent call of __journal_drop_transaction()
 	 * FIXME: needs barriers
 	 * KLUDGE: [use j_state_lock]
 	 */