[PATCH] powerpc: Add support for userspace P9 copy paste

[David Laight]

From: Chris Smart
> Sent: 28 April 2016 00:52
...
> >In that case what actually completes the copy?
> >I think you'd need to be inside a 'restartable atomic sequence'
> >in which case the cp_abort need only be done when the/a RAS
> >block is detected.
> >
> >Or have I missed something??
> 
> It's up to the userspace process that's doing the copy paste to check
> the CR field after the paste to see whether it has succeeded. If it has
> not succeeded, then the process can choose to re-do the copy and paste.
>
> Hope that makes sense.

Yes, thanks.

	David