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

[Ingo Molnar <mingo@xxxxxxx>]

* Jeremy Fitzhardinge <jeremy@xxxxxxxx> 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@xxxxxxx>

        Ingo

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