From db721d32b74b51a5ac9ec9fab1d85cba90dbdbd3 Mon Sep 17 00:00:00 2001
From: NeilBrown <neilb@suse.de>
Date: Mon, 15 Dec 2014 12:56:58 +1100
Subject: [PATCH] md: level_store: group all important changes into one place.

Gather all the changes that can happen atomically and might
be relevant to other code into one place.  This will
make it easier to refine the locking.

Note that this puts quite a few things between mddev_detach()
and ->free().  Enabling this was the point of some recent patches.

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