1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 460294bb0fa5..02fa42d24b52 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -551,6 +551,7 @@ struct request_queue {
         int                     node;
 #ifdef CONFIG_BLK_DEV_IO_TRACE
         struct blk_trace        *blk_trace;
+        struct mutex            blk_trace_mutex;
 #endif
         /*
          * for flush operations