From 2bce64858442149784f6c8803c9095a8556320a2 Mon Sep 17 00:00:00 2001
From: Christoph Lameter <cl@linux-foundation.org>
Date: Mon, 19 Jul 2010 11:39:11 -0500
Subject: [PATCH] slub: Allow removal of slab caches during boot

Serialize kmem_cache_create and kmem_cache_destroy using the slub_lock. Only
possible after the use of the slub_lock during dynamic dma creation has been
removed.

Then make sure that the setup of the slab sysfs entries does not race
with kmem_cache_create and kmem_cache destroy.

If a slab cache is removed before we have setup sysfs then simply skip over
the sysfs handling.

Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Roland Dreier <rdreier@cisco.com>
Signed-off-by: Christoph Lameter <cl@linux-foundation.org>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
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