kobjects in 2.6

kobjects now handle:
Representation in sysfs
Device model hierarchy glue
Hotplug event generation
Reference counting
(Actually, krefs do that now)

kobjects are complicated
They have several roles
Multiple, inter-related pieces
kobject - the core object
kset - a collection of kobjects
ktype - common kobject type information
subsystem - a top-level kset
Always part of something bigger