1 files changed, 11 insertions, 2 deletions

diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index 14ed16fd862..4794ec891fe 100644
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -60,8 +60,13 @@ struct extent_io_ops {
                                       struct extent_state *state, int uptodate);
         int (*set_bit_hook)(struct inode *inode, u64 start, u64 end,
                             unsigned long old, unsigned long bits);
-        int (*clear_bit_hook)(struct inode *inode, u64 start, u64 end,
-                            unsigned long old, unsigned long bits);
+        int (*clear_bit_hook)(struct inode *inode, struct extent_state *state,
+                              unsigned long bits);
+        int (*merge_extent_hook)(struct inode *inode,
+                                 struct extent_state *new,
+                                 struct extent_state *other);
+        int (*split_extent_hook)(struct inode *inode,
+                                 struct extent_state *orig, u64 split);
         int (*write_cache_pages_lock_hook)(struct page *page);
 };
 
@@ -79,10 +84,14 @@ struct extent_state {
         u64 start;
         u64 end; /* inclusive */
         struct rb_node rb_node;
+
+        /* ADD NEW ELEMENTS AFTER THIS */
         struct extent_io_tree *tree;
         wait_queue_head_t wq;
         atomic_t refs;
         unsigned long state;
+        u64 split_start;
+        u64 split_end;
 
         /* for use by the FS */
         u64 private;