Hmmm.. If I separately allocate the kobject then I can no longer get to
the kmem_cache structure from the kobject.
I need to add a second kobject_del to sysfs_slab_remove() to make sysfs
completely forget about the object?
Probably should track down any remaining symlinks at that point and nuke
them too. Isnt there some way to convince sysfs to remove the symlinks
if the target vanishes?
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