Re: [RFC 00/15] x86_64: Optimize percpu accesses

[Christoph Lameter]

Jeremy Fitzhardinge wrote:

> No, they don't help at all, because they convert X_pda(Y) (which doesn't
> exist) into x86_X_percpu(pda.Y) (which also doesn't exist).  They don't
> remove any #ifdef CONFIG_X86_64's.  If you're going to tromp all over
> the source, you may as well do the most useful thing in the first step.

Well they help in the sense that the patches get rid of the special X_pda(Y) operations. 
x86_X_percpu will then exist under 32 bit and 64 bit.

What is remaining is the task to rename 

	pda.Y -> Z

in order to make variable references the same under both arches. Presumably the Z is the corresponding 32 bit variable. There are likely a number of cases where the transformation
is trivial if we just identify the corresponding 32 bit equivalent.

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