Right. That is why they are list_del_rcu() and hlist_del_rcu().
The comments for list_del_rcu() clearly say that pointers
are not re-initialized.
> This is that the __xxx_del() functions are there for - they won't do the
> poisoning. The regular delete functions have historically always poisoned
> the pointers - it was only removed a few months ago by Andrew.
Poisoning xxx_del() functions is ok. That should be done.
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