diff --git a/fs/btrfs/btrfs_inode.h b/fs/btrfs/btrfs_inode.h
index 0b2e623..1b9ec1a 100644
--- a/fs/btrfs/btrfs_inode.h
+++ b/fs/btrfs/btrfs_inode.h
@@ -49,9 +49,6 @@
 	 */
 	struct extent_io_tree io_failure_tree;
 
-	/* held while inserting checksums to avoid races */
-	struct mutex csum_mutex;
-
 	/* held while inesrting or deleting extents from files */
 	struct mutex extent_mutex;
 
@@ -79,6 +76,9 @@
 	 */
 	u64 generation;
 
+	/* sequence number for NFS changes */
+	u64 sequence;
+
 	/*
 	 * transid of the trans_handle that last modified this inode
 	 */