From 7e92e1d7629b00578cef22b1f4c6ada726663701 Mon Sep 17 00:00:00 2001
From: Markus Stockhausen <stockhausen@collogia.de>
Date: Mon, 15 Dec 2014 12:57:04 +1100
Subject: [PATCH] md/raid6 algorithms: improve test program

It is always helpful to have a test tool in place if we implement
new data critical algorithms. So add some test routines to the raid6
checker that can prove if the new xor_syndrome() works as expected.

Run through all permutations of start/stop pages per algorithm and
simulate a xor_syndrome() assisted rmw run. After each rmw check if
the recovery algorithm still confirms that the stripe is fine.

Signed-off-by: Markus Stockhausen <stockhausen@collogia.de>
Signed-off-by: NeilBrown <neilb@suse.de>
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