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SubjectRe: [PATCH 6/6] cpuid neatening.
Rusty Russell wrote:
> Roll all the cpuid asm into one __cpuid call. It's a little neater,
> and also means only one place to patch for paravirtualization.

The whole point of those is to avoid the unnecessary write to memory and
pick it back up again. This patch reintroduces that ugliness.

You don't want to make it the obvious multi-return macro, either,
because that code is known to break some old versions of gcc.

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