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80f9c147f7
Commit d32f31f411 ("btrfs-tree: harden
`rlower_bound` against exceptional objects") passes the first btrfs item
in the result set that is above upper_bound up to `seek_backward`.
This is somewhat wasteful as `seek_backward` cannot use such a result.
Reverse that change in behavior, while keeping the rest of the other
commit.
This introduces a new case, where the search ioctl is producing items
that are above upper bound, but there are no items in the result set,
which continues looping until the end of the filesystem is reached.
Handle that by setting an explicit exit variable.
Signed-off-by: Zygo Blaxell <bees@furryterror.org>