linux-kernel - Re: [this_cpu_xx V4 01/20] Introduce this_cpu_ptr() and generic this_cpu

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Date:	Tue, 6 Oct 2009 20:34:39 +1030
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	Christoph Lameter <cl@...ux-foundation.org>
Cc:	Ingo Molnar <mingo@...e.hu>, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org, David Howells <dhowells@...hat.com>,
	Tejun Heo <tj@...nel.org>, Eric Dumazet <dada1@...mosbay.com>,
	Pekka Enberg <penberg@...helsinki.fi>
Subject: Re: [this_cpu_xx V4 01/20] Introduce this_cpu_ptr() and generic this_cpu_* operations

On Sat, 3 Oct 2009 02:41:54 am Christoph Lameter wrote:
> On Fri, 2 Oct 2009, Ingo Molnar wrote:
> 
> > > @@ -66,6 +69,8 @@ extern void setup_per_cpu_areas(void);
> > >  #define per_cpu(var, cpu)			(*((void)(cpu), &per_cpu_var(var)))
> > >  #define __get_cpu_var(var)			per_cpu_var(var)
> > >  #define __raw_get_cpu_var(var)			per_cpu_var(var)
> > > +#define this_cpu_ptr(ptr) per_cpu_ptr(ptr, 0)
> > > +#define __this_cpu_ptr(ptr) this_cpu_ptr(ptr)

I still think that it's not symmetrical: get_cpu_var implies get_cpu_ptr; there's no
"this" in any Linux API until now.

OTOH, this_cpu_<op> makes much more sense than cpu_<op> or something, so I'm
not really going to complain.

Does this mean we can kill local.h soon?

Thanks for all this!
Rusty.
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