1 files changed, 3 insertions, 0 deletions
diff --git a/block.c b/block.c
index df353d5..7483dfa 100644
--- a/block.c
+++ b/block.c
@@ -67,12 +67,15 @@
 
 #define NOT_DONE 0x7fffffff /* used while emulated sync operation in progress */
 
+/* Protected by BQL */
 static QTAILQ_HEAD(, BlockDriverState) graph_bdrv_states =
     QTAILQ_HEAD_INITIALIZER(graph_bdrv_states);
 
+/* Protected by BQL */
 static QTAILQ_HEAD(, BlockDriverState) all_bdrv_states =
     QTAILQ_HEAD_INITIALIZER(all_bdrv_states);
 
+/* Protected by BQL */
 static QLIST_HEAD(, BlockDriver) bdrv_drivers =
     QLIST_HEAD_INITIALIZER(bdrv_drivers);