> > AFAICT it's called via rcu, does that mean anything released via rcu has
> > to be protected against interrupts?
>
> RCU means softirq, probably we can use spin_lock_bh() to protect against deadlock.
> But free_uid() may be called with irqs disabled, we can't use local_bh_enable()
> in such a case.
Eek, I wasn't really aware of it and this would really suck. We should
move things out of the interrupt context and not into it. :(
I would call it a bug in the rcu system.
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