From af8e2d1df9848b39dd86b1e696bf8781d2020a88 Mon Sep 17 00:00:00 2001
From: Miao Xie <miaox@cn.fujitsu.com>
Date: Thu, 23 Oct 2014 14:42:50 +0800
Subject: [PATCH] Btrfs, scrub: repair the common data on RAID5/6 if it is
 corrupted

This patch implement the RAID5/6 common data repair function, the
implementation is similar to the scrub on the other RAID such as
RAID1, the differentia is that we don't read the data from the
mirror, we use the data repair function of RAID5/6.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
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