From 9691975dd663b255fa52404dc7de4b18892bf244 Mon Sep 17 00:00:00 2001
From: Yan <yanzheng@21cn.com>
Date: Tue, 4 Dec 2007 13:20:20 -0500
Subject: [PATCH] Btrfs: Fix buffer get/release issue in create_snapshot
 btrfs_cow_block expects a reference to be held on the buffer being cow'd.

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