SLUB: Fix sysfs refcounting
If CONFIG_SYSFS is set then free the kmem_cache structure when sysfs tells us its okay. Otherwise there is the danger (as pointed out by Al Viro) that sysfs thinks the kobject still exists after kmem_cache_destroy() removed it. Signed-off-by: Christoph Lameter <clameter@sgi.com> Reviewed-by: Pekka J Enberg <penberg@cs.helsinki.fi>
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