1 files changed, 2 insertions, 0 deletions

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 5a800986f416..5f4921554f0a 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -1814,6 +1814,8 @@ struct btrfs_root {
         struct list_head delalloc_inodes;
         struct list_head delalloc_root;
         u64 nr_delalloc_inodes;
+
+        struct mutex ordered_extent_mutex;
         /*
          * this is used by the balancing code to wait for all the pending
          * ordered extents