linux-kernel - Re: [RFC v2 6/7] mm/powerpc: Use generic VDSO remap and unmap functions

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Message-ID: <87oa1vn8lc.fsf@concordia.ellerman.id.au>
Date:   Fri, 04 Nov 2016 15:59:43 +1100
From:   Michael Ellerman <mpe@...erman.id.au>
To:     Christopher Covington <cov@...eaurora.org>, criu@...nvz.org,
        Will Deacon <will.deacon@....com>, linux-mm@...ck.org,
        Laurent Dufour <ldufour@...ux.vnet.ibm.com>
Cc:     Christopher Covington <cov@...eaurora.org>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC v2 6/7] mm/powerpc: Use generic VDSO remap and unmap functions

Christopher Covington <cov@...eaurora.org> writes:

> The PowerPC VDSO remap and unmap code was copied to a generic location,
> only modifying the variable name expected in mm->context (vdso instead of
> vdso_base) to match most other architectures. Having adopted this generic
> naming, drop the code in arch/powerpc and use the generic version.
>
> Signed-off-by: Christopher Covington <cov@...eaurora.org>
> ---
>  arch/powerpc/Kconfig                     |  1 +
>  arch/powerpc/include/asm/Kbuild          |  1 +
>  arch/powerpc/include/asm/mm-arch-hooks.h | 28 -------------------------
>  arch/powerpc/include/asm/mmu_context.h   | 35 +-------------------------------
>  4 files changed, 3 insertions(+), 62 deletions(-)
>  delete mode 100644 arch/powerpc/include/asm/mm-arch-hooks.h

This looks OK.

Have you tested it on powerpc? I could but I don't know how to actually
trigger these paths, I assume I need a CRIU setup?

Can you flip the subject to "powerpc/mm: ...".

cheers