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SubjectRe: [PATCH v2 1/2] x86/retpoline: Simplify vmexit_fill_RSB()
> + * Google experimented with loop-unrolling and this turned out to be
> + * the optimal version — two calls, each with their own speculation
> + * trap should their return address end up getting used, in a loop.
> + */
> +.macro BOINK_RSB nr:req sp:req


BOINK?

Really?

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