1 files changed, 1 insertions, 0 deletions

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 80a9aefb0c46..aac314e14188 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -1778,6 +1778,7 @@ struct btrfs_fs_info {
         spinlock_t unused_bgs_lock;
         struct list_head unused_bgs;
         struct mutex unused_bg_unpin_mutex;
+        struct mutex delete_unused_bgs_mutex;
 
         /* For btrfs to record security options */
         struct security_mnt_opts security_opts;