Re: Calling current() from interrupt context

From: Kenn Humborg (
Date: Sun Oct 08 2000 - 20:14:47 EST

On Mon, Oct 09, 2000 at 01:02:21AM +0200, Jamie Lokier wrote:
> wrote:
> > BTW: there is an implicit reference to "current" in smp_processor_id.
> Yes I forgot about that. (Self-flagellate). However that is
> architecture specific. If it's not an SMP Vax port, no big deal. If it
> is, there's a way to arrange that smp_processor_id returns the correct
> processor id even from the interrupt stack.

Yes, that's easily done. Interrupt stacks are per-processor, so they are
part of the per-cpu data structures. So we can use a similar trick to the
task_struct/kernel stack hack. (And still get a crash if current is used
from interrupt context.)


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