[PATCH] powerpc/powernv: fix variable "c" set but not used

[Christoph Hellwig]

On Thu, May 23, 2019 at 09:26:53AM +0200, Christophe Leroy wrote:
> You are not fixing the problem, you are just hiding it.
> 
> If the result of __get_user() is unneeded, it means __get_user() is not the
> good function to use.
> 
> Should use fault_in_pages_readable() instead.

Also it is not just the variable that is unused, but that whole
function.  I'll resend my series to remote it in a bit.