Jan Schmidt 5d9e75c41d 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>
2012-05-30 15:17:33 +02:00
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