Subject: Re: [PATCH 18/25] powerpc: check key protection for user page access

From: Balbir Singh <[email-masked]>
Date: Thu, 19 Oct 2017 06:57:32 +1100

On Fri,  8 Sep 2017 15:45:06 -0700
Ram Pai <[email-masked]> wrote:

> Make sure that the kernel does not access user pages without
> checking their key-protection.
>

Why? This makes the routines AMR/thread specific? Looks like
x86 does this as well, but these routines are used by GUP from
the kernel.

Balbir Singh.