tree c7e6e1011997dcba5fd9522cd4172b34dec15860
parent f3ea38da3e76455fbd6d405cdca4d050ed085458
author Jan Schmidt <list.btrfs@jan-o-sch.net> 1337185547 +0200
committer Jan Schmidt <list.btrfs@jan-o-sch.net> 1338383853 +0200

Btrfs: add btrfs_search_old_slot

The tree modification log together with the current state of the tree gives
a consistent, old version of the tree. btrfs_search_old_slot is used to
search through this old version and return old (dummy!) extent buffers.
Naturally, this function cannot do any tree modifications.

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