Re: [PATCH v2 07/15] x86/lib/copy_user_64.S: Convert to ALTERNATIVE_2

[Borislav Petkov]

On Thu, Mar 05, 2015 at 01:34:17AM +0100, Ingo Molnar wrote:
> So I'd not patch in the large _orig variant, it's legacy mostly - but
> the two fast variants?

Yes, so the optimal thing would be to have the kernel generate the CALL
<REP_GOOD> variant when building. Those are going to be the default
opcodes in vmlinux coming out of build.

Then, when booted on ERMS machines, we'll patch in CALL <ERMS version>
and as a last resort fallback, the CALL to the legacy variant on really
old boxes.

/me puts it on the TODO.

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
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