From 73e48b277a3fcd647f1936c71aea2f8d450ecc74 Mon Sep 17 00:00:00 2001
From: Yan <yanzheng@21cn.com>
Date: Thu, 3 Jan 2008 14:14:39 -0500
Subject: [PATCH] Btrfs: Properly handle overlapping extent in
 shrink_extent_tree

The patch fixes the overlapping extent issue in shrink_extent_tree.
It checks whether there is an overlapping extent by using
find_previous_extent. If there is an overlapping extent, it setups
key.objectid and cur_byte properly.

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Signed-off-by: Chris Mason <chris.mason@oracle.com>
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