diff --git a/fs/btrfs/ordered-data.h b/fs/btrfs/ordered-data.h
index 4fa7873..33292c5 100644
--- a/fs/btrfs/ordered-data.h
+++ b/fs/btrfs/ordered-data.h
@@ -20,24 +20,73 @@
 #define __BTRFS_ORDERED_DATA__
 
 struct btrfs_ordered_inode_tree {
-	rwlock_t lock;
+	struct mutex mutex;
 	struct rb_root tree;
+	struct rb_node *last;
 };
 
+struct btrfs_sector_sum {
+	u64 offset;
+	u32 sum;
+};
+
+struct btrfs_ordered_sum {
+	u64 file_offset;
+	u64 len;
+	struct list_head list;
+	struct btrfs_sector_sum sums;
+};
+
+/* bits for the flags field */
+#define BTRFS_ORDERED_IO_DONE 0 /* set when all the pages are written */
+#define BTRFS_ORDERED_COMPLETE 1 /* set when removed from the tree */
+#define BTRFS_ORDERED_START 2 /* set when tree setup */
+
+struct btrfs_ordered_extent {
+	u64 file_offset;
+	u64 start;
+	u64 len;
+	unsigned long flags;
+	atomic_t refs;
+	struct list_head list;
+	struct inode *inode;
+	wait_queue_head_t wait;
+	struct rb_node rb_node;
+};
+
+
+static inline int btrfs_ordered_sum_size(struct btrfs_root *root, u64 bytes)
+{
+	unsigned long num_sectors = (bytes + root->sectorsize - 1) /
+		root->sectorsize;
+	return sizeof(struct btrfs_ordered_sum) +
+		num_sectors * sizeof(struct btrfs_sector_sum);
+}
+
 static inline void
 btrfs_ordered_inode_tree_init(struct btrfs_ordered_inode_tree *t)
 {
-	rwlock_init(&t->lock);
+	mutex_init(&t->mutex);
 	t->tree.rb_node = NULL;
+	t->last = NULL;
 }
 
-int btrfs_add_ordered_inode(struct inode *inode);
-int btrfs_find_del_first_ordered_inode(struct btrfs_ordered_inode_tree *tree,
-				       u64 *root_objectid, u64 *objectid,
-				       struct inode **inode);
-int btrfs_find_first_ordered_inode(struct btrfs_ordered_inode_tree *tree,
-				       u64 *root_objectid, u64 *objectid,
-				       struct inode **inode);
-void btrfs_del_ordered_inode(struct inode *inode, int force);
-int btrfs_ordered_throttle(struct btrfs_root *root, struct inode *inode);
+int btrfs_put_ordered_extent(struct btrfs_ordered_extent *entry);
+int btrfs_remove_ordered_extent(struct inode *inode,
+				struct btrfs_ordered_extent *entry);
+int btrfs_dec_test_ordered_pending(struct inode *inode,
+				       u64 file_offset, u64 io_size);
+int btrfs_add_ordered_extent(struct inode *inode, u64 file_offset,
+			     u64 start, u64 len);
+int btrfs_add_ordered_sum(struct inode *inode, struct btrfs_ordered_sum *sum);
+struct btrfs_ordered_extent *btrfs_lookup_ordered_extent(struct inode *inode,
+							 u64 file_offset);
+void btrfs_wait_ordered_extent(struct inode *inode,
+			       struct btrfs_ordered_extent *entry);
+void btrfs_wait_ordered_range(struct inode *inode, u64 start, u64 len);
+struct btrfs_ordered_extent *
+btrfs_lookup_first_ordered_extent(struct inode * inode, u64 file_offset);
+int btrfs_add_ordered_pending(struct inode *inode,
+			      struct btrfs_ordered_extent *ordered,
+			      u64 start, u64 len);
 #endif