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由 Jan Schmidt 提交于
get_old_root could race with root node updates because we weren't locking the node early enough. Use btrfs_read_lock_root_node to grab the root locked in the very beginning and release the lock as soon as possible (just like btrfs_search_slot does). Signed-off-by: NJan Schmidt <list.btrfs@jan-o-sch.net>
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