[v2] powerpc/signal32: Use fault_in_pages_readable() to prefault user context

[Michael Ellerman]

On Tue, 2018-04-24 at 16:04:25 UTC, Christophe Leroy wrote:
> Use fault_in_pages_readable() to prefault user context
> instead of open coding
> 
> Signed-off-by: Christophe Leroy <christophe.leroy at c-s.fr>
> Reviewed-by: Mathieu Malaterre <malat at debian.org>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/56b04d568f880a48d892e840cfaf4e

cheers