1 files changed, 9 insertions, 8 deletions

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 5b0c79d22c09..8733081d97a3 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -653,6 +653,9 @@ struct btrfs_block_group_cache {
 
         /* for block groups in the same raid type */
         struct list_head list;
+
+        /* usage count */
+        atomic_t count;
 };
 
 struct btrfs_leaf_ref_tree {
@@ -1706,10 +1709,8 @@ int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
                                                          btrfs_fs_info *info,
                                                          u64 bytenr);
-struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
-                                                 struct btrfs_block_group_cache
-                                                 *hint, u64 search_start,
-                                                 int data, int owner);
+u64 btrfs_find_block_group(struct btrfs_root *root,
+                           u64 search_start, u64 search_hint, int owner);
 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
                                              struct btrfs_root *root,
                                              u32 blocksize, u64 parent,
@@ -1770,6 +1771,7 @@ int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
                             u64 owner_objectid);
 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
                                     struct btrfs_root *root);
+int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
 int btrfs_free_block_groups(struct btrfs_fs_info *info);
 int btrfs_read_block_groups(struct btrfs_root *root);
 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
@@ -2019,10 +2021,9 @@ int btrfs_start_delalloc_inodes(struct btrfs_root *root);
 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end);
 int btrfs_writepages(struct address_space *mapping,
                      struct writeback_control *wbc);
-int btrfs_create_subvol_root(struct btrfs_root *new_root, struct dentry *dentry,
-                struct btrfs_trans_handle *trans, u64 new_dirid,
-                struct btrfs_block_group_cache *block_group);
-
+int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
+                             struct btrfs_root *new_root, struct dentry *dentry,
+                             u64 new_dirid, u64 alloc_hint);
 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
                          size_t size, struct bio *bio, unsigned long bio_flags);