In article <1059172995.16255.6.camel@sherbert> you wrote:
> 1. ->cleanup() - unregister IRQ handlers, timers, etc.
...
> surely if nothing is registered and all CPUs do a voluntary schedule()
> then there can be no chance of calling back in to the module.
no, because data structures might contain pointers, especially in handles.
So unregistering will avoid new handlers to jump into the code, but it will
not avoid that existing objets (i.e. open handles) exist. And exactly for
those the refcounting is used.
Greetings
Bernd
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