From fe60b0142813002be16dfae28780d9779ee22473 Mon Sep 17 00:00:00 2001
From: NeilBrown <neilb@suse.de>
Date: Mon, 29 Mar 2010 11:10:42 +1100
Subject: [PATCH] md: factor do_md_run to separate accesses to ->gendisk

As part of relaxing the binding between an mddev and gendisk,
we separate do_md_run into two functions.
  md_run does all the work internal to md
  do_md_run calls md_run and makes and changes to gendisk
     that are required.

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