With the current set of changes we could probably do this check, but it
would involve changing the code quite a bit, and in the future we're not
going to track the metadata in the extent tree at all.  Since this check
was for a very old kernel just skip it for extent tree v2.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
---
 check/main.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/check/main.c b/check/main.c
index c28fa2f3..0bd87685 100644
--- a/check/main.c
+++ b/check/main.c

@@ -10065,6 +10065,9 @@ static int repair_root_items(void)
 	int bad_roots = 0;
 	int need_trans = 0;
 
+	if (btrfs_fs_incompat(gfs_info, EXTENT_TREE_V2))
+		return 0;
+
 	btrfs_init_path(&path);
 
 	ret = build_roots_info_cache();

-- 
2.26.3