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-rw-r--r--include/block/graph-lock.h6
1 files changed, 4 insertions, 2 deletions
diff --git a/include/block/graph-lock.h b/include/block/graph-lock.h
index 7574a2de5b..7e04f98ff0 100644
--- a/include/block/graph-lock.h
+++ b/include/block/graph-lock.h
@@ -111,10 +111,12 @@ void unregister_aiocontext(AioContext *ctx);
* The wrlock can only be taken from the main loop, with BQL held, as only the
* main loop is allowed to modify the graph.
*
+ * If @bs is non-NULL, its AioContext is temporarily released.
+ *
* This function polls. Callers must not hold the lock of any AioContext other
- * than the current one.
+ * than the current one and the one of @bs.
*/
-void bdrv_graph_wrlock(void) TSA_ACQUIRE(graph_lock) TSA_NO_TSA;
+void bdrv_graph_wrlock(BlockDriverState *bs) TSA_ACQUIRE(graph_lock) TSA_NO_TSA;
/*
* bdrv_graph_wrunlock: