From c0f7bddbe60f43578dccf4ffb8d4bff88f625ea7 Mon Sep 17 00:00:00 2001
From: Yuri Tikhonov <yur@emcraft.com>
Date: Sat, 29 Aug 2009 19:13:12 -0700
Subject: [PATCH] md/raid5,6: common schedule_reconstruction for raid5/6

Extend schedule_reconstruction5 for reuse by the raid6 path.  Add
support for generating Q and BUG() if a request is made to perform
'prexor'.

Signed-off-by: Yuri Tikhonov <yur@emcraft.com>
Signed-off-by: Ilya Yanok <yanok@emcraft.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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