1 files changed, 4 insertions, 0 deletions

diff --git a/fs/btrfs/btrfs_inode.h b/fs/btrfs/btrfs_inode.h
index ed8ca7ca5eff..2a8c242bc4f5 100644
--- a/fs/btrfs/btrfs_inode.h
+++ b/fs/btrfs/btrfs_inode.h
@@ -39,6 +39,7 @@
 #define BTRFS_INODE_HAS_ORPHAN_ITEM             5
 #define BTRFS_INODE_HAS_ASYNC_EXTENT            6
 #define BTRFS_INODE_NEEDS_FULL_SYNC             7
+#define BTRFS_INODE_COPY_EVERYTHING             8
 
 /* in memory btrfs inode */
 struct btrfs_inode {
@@ -90,6 +91,9 @@ struct btrfs_inode {
 
         unsigned long runtime_flags;
 
+        /* Keep track of who's O_SYNC/fsycing currently */
+        atomic_t sync_writers;
+
         /* full 64 bit generation number, struct vfs_inode doesn't have a big
          * enough field for this.
          */