From f18c1a35f62caccb527e8b0990c8801596e7c662 Mon Sep 17 00:00:00 2001
From: NeilBrown <neilb@suse.de>
Date: Fri, 8 May 2015 18:19:04 +1000
Subject: [PATCH] md/raid5: new alloc_stripe() to allocate an initialize a
 stripe.

The new batch_lock and batch_list fields are being initialized in
grow_one_stripe() but not in resize_stripes().  This causes a crash
on resize.

So separate the core initialization into a new function and call it
from both allocation sites.

Signed-off-by: NeilBrown <neilb@suse.de>
Fixes: 59fc630b8b5f ("RAID5: batch adjacent full stripe write")
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