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From:   Michael Ellerman <mpe@ellerman.id.au>
To:     Christophe Leroy <christophe.leroy@c-s.fr>,
        Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Paul Mackerras <paulus@samba.org>, ruscur@russell.cc
Cc:     linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Subject: Re: [RFC PATCH v2 04/11] powerpc/mm: Add a framework for Kernel Userspace Access Protection
In-Reply-To: <df38a42e7c3cce892d7f6bbd88b5388774c8bef0.1543356926.git.christophe.leroy@c-s.fr>
References: <76d777b36e54e7b8d4c196405decc712fc5eaf45.1543356926.git.christophe.leroy@c-s.fr> <df38a42e7c3cce892d7f6bbd88b5388774c8bef0.1543356926.git.christophe.leroy@c-s.fr>
Date:   Fri, 21 Dec 2018 16:07:53 +1100
Message-ID: <87sgyrpivq.fsf@concordia.ellerman.id.au>
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Christophe Leroy <christophe.leroy@c-s.fr> writes:

> This patch implements a framework for Kernel Userspace Access
> Protection.
>
> Then subarches will have to possibility to provide their own
> implementation by providing setup_kuap() and lock/unlock_user_access()
>
> Some platform will need to know the area accessed and whether it is
> accessed from read, write or both. Therefore source, destination and
> size and handed over to the two functions.
>
> Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>

I think some of this code came from Russell's original patch?

In which case we should have his signed-off-by here.

cheers