On Wed, 2005-12-21 at 15:23 +1100, O Plameras wrote:
> James Gregory wrote:
>
> >/*
> > * If CONFIG_SMP is unset, declare the _raw_* definitions as nops
> > */
> >#define spin_lock_init(lock) do { (void)(lock); } while(0)
> >#define _raw_spin_lock(lock) do { (void)(lock); } while(0)
> >
> >
> >
>
> Is this euphemism for "in ubuntu SMP is not implemented" ?
The piece of code I was citing comes from a region protected by
#ifndef CONFIG_SMP
And as I noted, the equivalent region which is compiled in when
CONFIG_SMP *is* set, actually implements a spin lock.
So I suppose you could think of it as a euphemism for "when SMP is
disabled, SMP is disabled".
James.
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