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Message-ID: <20190624174015.GL29120@arrakis.emea.arm.com>
Date: Mon, 24 Jun 2019 18:40:15 +0100
From: Catalin Marinas <catalin.marinas@....com>
To: Andrey Konovalov <andreyknvl@...gle.com>
Cc: linux-arm-kernel@...ts.infradead.org, linux-mm@...ck.org,
linux-kernel@...r.kernel.org, amd-gfx@...ts.freedesktop.org,
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Vincenzo Frascino <vincenzo.frascino@....com>,
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Yishai Hadas <yishaih@...lanox.com>,
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Alexander Deucher <Alexander.Deucher@....com>,
Christian Koenig <Christian.Koenig@....com>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Jens Wiklander <jens.wiklander@...aro.org>,
Alex Williamson <alex.williamson@...hat.com>,
Leon Romanovsky <leon@...nel.org>,
Luc Van Oostenryck <luc.vanoostenryck@...il.com>,
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Jason Gunthorpe <jgg@...pe.ca>,
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Robin Murphy <robin.murphy@....com>,
Kevin Brodsky <kevin.brodsky@....com>,
Szabolcs Nagy <Szabolcs.Nagy@....com>
Subject: Re: [PATCH v18 11/15] IB/mlx4: untag user pointers in
mlx4_get_umem_mr
On Mon, Jun 24, 2019 at 04:32:56PM +0200, Andrey Konovalov wrote:
> This patch is a part of a series that extends kernel ABI to allow to pass
> tagged user pointers (with the top byte set to something else other than
> 0x00) as syscall arguments.
>
> mlx4_get_umem_mr() uses provided user pointers for vma lookups, which can
> only by done with untagged pointers.
>
> Untag user pointers in this function.
>
> Signed-off-by: Andrey Konovalov <andreyknvl@...gle.com>
> ---
> drivers/infiniband/hw/mlx4/mr.c | 7 ++++---
> 1 file changed, 4 insertions(+), 3 deletions(-)
Acked-by: Catalin Marinas <catalin.marinas@....com>
This patch also needs an ack from the infiniband maintainers (Jason).
--
Catalin
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