From 486f0644c3482cbf64fe804499836e1f05abec14 Mon Sep 17 00:00:00 2001
From: NeilBrown <neilb@suse.de>
Date: Wed, 25 Feb 2015 12:10:35 +1100
Subject: [PATCH] md/raid5: move max_nr_stripes management into grow_one_stripe
 and drop_one_stripe

Rather than adjusting max_nr_stripes whenever {grow,drop}_one_stripe()
succeeds, do it inside the functions.

Also choose the correct hash to handle next inside the functions.

This removes duplication and will help with future new uses of
{grow,drop}_one_stripe.

This also fixes a minor bug where the "md/raid:%md: allocate XXkB"
message always said "0kB".

Signed-off-by: NeilBrown <neilb@suse.de>
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