Re: [PATCH 17/39] clobber rbx in putuser_64.S

[Andi Kleen]

> But for this case, I think we can come up with a macro that selects the 
> appropriate register for each of them. Should be easy to do now that the 
> code is merged.

Note that each get_user() backend is ~10 lines or so. If you add
that many macros you might end up with more code than if you 
just keep them separate.

While I admit I am also partly to blame for some asm macro
mess, e.g. in entry.S, I relented and would now advocate
to minimize macro use in assembler. It simply makes it much
harder to understand and to change.

-Andi

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