From d548ee5182bda42c87bdd4e28b539d5e436e206a Mon Sep 17 00:00:00 2001
From: Yan <yanzheng@21cn.com>
Date: Thu, 3 Jan 2008 13:56:30 -0500
Subject: [PATCH] Btrfs: Add a helper that finds previous extent item

Signed-off-by: Chris Mason <chris.mason@oracle.com>
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Reading git-format-patch failed