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-rw-r--r--include/system/block-backend-global-state.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/system/block-backend-global-state.h b/include/system/block-backend-global-state.h
index 1a134083b7..f6ec1174e6 100644
--- a/include/system/block-backend-global-state.h
+++ b/include/system/block-backend-global-state.h
@@ -78,7 +78,7 @@ int blk_make_zero(BlockBackend *blk, BdrvRequestFlags flags);
 void blk_aio_cancel(BlockAIOCB *acb);
 int blk_commit_all(void);
 bool blk_in_drain(BlockBackend *blk);
-void blk_drain(BlockBackend *blk);
+void GRAPH_UNLOCKED blk_drain(BlockBackend *blk);
 void GRAPH_UNLOCKED blk_drain_all(void);
 void blk_set_on_error(BlockBackend *blk, BlockdevOnError on_read_error,
                       BlockdevOnError on_write_error);