Merge branch 'linus' into smp/hotplug

Apply upstream changes to avoid conflicts with pending patches.

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/btrfs/disk-io.h b/fs/btrfs/disk-io.h
index b3207a0e09f7..f19a982f5a4f 100644
--- a/fs/btrfs/disk-io.h
+++ b/fs/btrfs/disk-io.h
@@ -68,6 +68,8 @@ struct extent_buffer *btrfs_find_tree_block(struct btrfs_fs_info *fs_info,
 struct btrfs_root *btrfs_read_fs_root(struct btrfs_root *tree_root,
                                       struct btrfs_key *location);
 int btrfs_init_fs_root(struct btrfs_root *root);
+struct btrfs_root *btrfs_lookup_fs_root(struct btrfs_fs_info *fs_info,
+                                        u64 root_id);
 int btrfs_insert_fs_root(struct btrfs_fs_info *fs_info,
                          struct btrfs_root *root);
 void btrfs_free_fs_roots(struct btrfs_fs_info *fs_info);