[PATCH] [ARM] Introduce patching of phys_to_virt and vice versa

Russell King - ARM Linux
2010-08-05T09:45:21Z

On Thu, Aug 05, 2010 at 04:45:25PM +0800, Eric Miao wrote:
> On Wed, Jul 21, 2010 at 5:16 AM, Russell King - ARM Linux
> <linux@arm.linux.org.uk> wrote:
> > On Fri, Jul 02, 2010 at 10:06:04AM -0500, Rob Herring wrote:
> >> Should something more generic like the x86 alternative code be done for
> >> ARM? It's very likely we will need patching in other places like for UP
> >> and SMP in one kernel.
> >
> > I think yes, we need to - I can't see how we can sensibly combine
> > kernels without this.
> >
> > However, the effect of this is that XIP can't use this - as the
> > kernel text is read-only.
> >
>
> Hi Russell,
>
> Sorry for late update on this. I've addressed your comments as below,
> and really hope this can get into this merge window, so I'm also sending
> this to your patch system right now ;-)

How does this affect the compiler's instruction scheduling w.r.t. previous
load instructions?