ARM diagnostic register across suspend/resume

[Shawn Guo]

On Tue, Jun 17, 2014 at 03:34:15PM +0100, Will Deacon wrote:
> The hardware guys got back to me, and I was mistaken (in fact, confused by
> another register). So the diagnostic register on A9 *does* read back with
> the value written to it. You still need to save/restore it across suspend,
> but read-modify-write is the right thing to do everywhere else.

Thanks for the confirmation, Will.

Shawn