Re: [PATCH] percpu: add optimized generic percpu accessors

[H. Peter Anvin]

Ingo Molnar wrote:
> > So if you could design the API such that we have a variant of add/inc 
> > that automatically disables/enables preemption then we can optimise that 
> > away on x86.
>
> Yeah. percpu_add(var, 1) does exactly that on x86.

And even on architectures which can only do percpu inc/dec we can make 
the right thing happen for a constant here, so we really don't need a 
new interface.  This is a good thing.

	-hpa
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