e2dfa1d5223c ("kobject: Add helper kobj_ns_type_is_valid()")
cdb4f26a63c3 ("kobject: kobj_type: remove default_attrs")
ee6d3dd4ed48 ("driver core: make kobj_type constant.")
079ad2fb4bf9 ("kobject: Avoid premature parent object freeing in kobject_cleanup()")