Re: [patch 14/26] Xen-paravirt_ops: add common patching machinery

Ingo Molnar
2007-03-16T09:21:54Z

* Jeremy Fitzhardinge <jeremy@goop.org> wrote:

> Implement the actual patching machinery. paravirt_patch_default()
> contains the logic to automatically patch a callsite based on a few
> simple rules:
>
> - if the paravirt_op function is paravirt_nop, then patch nops
> - if the paravirt_op function is a jmp target, then jmp to it
> - if the paravirt_op function is callable and doesn't clobber too much
> for the callsite, call it directly
>
> paravirt_patch_default is suitable as a default implementation of
> paravirt_ops.patch, will remove most of the expensive indirect calls
> in favour of either a direct call or a pile of nops.

Acked-by: Ingo Molnar <mingo@elte.hu>

Ingo