btrfs: use chunk_root in find_free_extent_update_loop

We're only using this to start the transaction with to possibly allocate
a chunk.  It doesn't really matter which root to use, but with extent
tree v2 we'll need a bytenr to look up a extent root which makes the
usage of the extent_root awkward here.  Simply change it to the
chunk_root.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 49bc6de..ae25ca5 100644 (file)
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -3977,7 +3977,7 @@ static int find_free_extent_update_loop(struct btrfs_fs_info *fs_info,
                                        struct find_free_extent_ctl *ffe_ctl,
                                        bool full_search)
 {
-       struct btrfs_root *root = fs_info->extent_root;
+       struct btrfs_root *root = fs_info->chunk_root;
        int ret;
 
        if ((ffe_ctl->loop == LOOP_CACHING_NOWAIT) &&