From 5f43f86e3f62734dfeeb36c4d940425a2c6789dc Mon Sep 17 00:00:00 2001
From: Gui Hecheng <guihc.fnst@cn.fujitsu.com>
Date: Mon, 21 Apr 2014 20:13:11 +0800
Subject: [PATCH] btrfs: fix wrong max system array size check in kernel space

For system chunk array,
We copy a "disk_key" and an chunk item each time,
so there should be enough space to hold both of them,
not only the chunk item.

Signed-off-by: Gui Hecheng <guihc.fnst@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
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