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SubjectRe: [PATCH 1 of 3] Introduce __raw_memcpy_toio32
    Bryan> The memcpy32 routine is, but __raw_memcpy_toio32 simply
Bryan> calls it, so we have two jump/ret pairs instead of one.

Oh, I think you're misunderstanding Andrew's idea. Just create a
generic __raw_memcpy_toio32() that is always compiled, but mark it
with attribute((weak)). Then x86_64 can define its own version of
__raw_memcpy_toio32(), which will override the weak generic version.

- R.
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