btrfs: let ->s_fs_info point to fs_info, not root...

the latter can be obtained from the former (by looking as ->tree_root)
just as cheaply as we currently are doing the other way round.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 2 insertions, 2 deletions

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index b6d11eb4e430..f7d8b9ba519b 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1894,8 +1894,8 @@ int open_ctree(struct super_block *sb,
         struct btrfs_key location;
         struct buffer_head *bh;
         struct btrfs_super_block *disk_super;
-        struct btrfs_root *tree_root = btrfs_sb(sb);
-        struct btrfs_fs_info *fs_info = tree_root->fs_info;
+        struct btrfs_fs_info *fs_info = btrfs_sb(sb);
+        struct btrfs_root *tree_root = fs_info->tree_root;
         struct btrfs_root *extent_root;
         struct btrfs_root *csum_root;
         struct btrfs_root *chunk_root;