1 files changed, 2 insertions, 4 deletions

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 8c63419a7f70..1afb18226da8 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1715,12 +1715,11 @@ static int setup_bdi(struct btrfs_fs_info *info, struct backing_dev_info *bdi)
 {
         int err;
 
-        bdi->capabilities = BDI_CAP_MAP_COPY;
-        err = bdi_setup_and_register(bdi, "btrfs", BDI_CAP_MAP_COPY);
+        err = bdi_setup_and_register(bdi, "btrfs");
         if (err)
                 return err;
 
-        bdi->ra_pages   = default_backing_dev_info.ra_pages;
+        bdi->ra_pages = VM_MAX_READAHEAD * 1024 / PAGE_CACHE_SIZE;
         bdi->congested_fn       = btrfs_congested_fn;
         bdi->congested_data     = info;
         return 0;
@@ -2319,7 +2318,6 @@ int open_ctree(struct super_block *sb,
          */
         fs_info->btree_inode->i_size = OFFSET_MAX;
         fs_info->btree_inode->i_mapping->a_ops = &btree_aops;
-        fs_info->btree_inode->i_mapping->backing_dev_info = &fs_info->bdi;
 
         RB_CLEAR_NODE(&BTRFS_I(fs_info->btree_inode)->rb_node);
         extent_io_tree_init(&BTRFS_I(fs_info->btree_inode)->io_tree,