tree 339d940a7cb3522169f9e2a8b14edf8b8ae15880
parent a95236d99fa56766f11056903439f55fe5038bcf
author Jan Schmidt <list.btrfs@jan-o-sch.net> 1339396169 +0200
committer Jan Schmidt <list.btrfs@jan-o-sch.net> 1339692729 +0200

Btrfs: add btrfs_next_old_leaf

To make sense of the tree mod log, the backref walker not only needs
btrfs_search_old_slot, but it also called btrfs_next_leaf, which in turn was
calling btrfs_search_slot. This obviously didn't give the correct result.

This commit adds btrfs_next_old_leaf, a drop-in replacement for
btrfs_next_leaf with a time_seq parameter. If it is zero, it behaves exactly
like btrfs_next_leaf. If it is non-zero, it will use btrfs_search_old_slot
with this time_seq parameter.

Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>