linux-kernel - Re: [PATCH 06/13] mm: remove superflous arguments from hmm_range

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Date:   Tue, 30 Jul 2019 17:51:00 +0000
From:   Jason Gunthorpe <jgg@...lanox.com>
To:     Christoph Hellwig <hch@....de>
CC:     Jérôme Glisse <jglisse@...hat.com>,
        Ben Skeggs <bskeggs@...hat.com>,
        Felix Kuehling <Felix.Kuehling@....com>,
        Ralph Campbell <rcampbell@...dia.com>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "nouveau@...ts.freedesktop.org" <nouveau@...ts.freedesktop.org>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "amd-gfx@...ts.freedesktop.org" <amd-gfx@...ts.freedesktop.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 06/13] mm: remove superflous arguments from
 hmm_range_register

On Tue, Jul 30, 2019 at 08:51:56AM +0300, Christoph Hellwig wrote:
> The start, end and page_shift values are all saved in the range
> structure, so we might as well use that for argument passing.
> 
> Signed-off-by: Christoph Hellwig <hch@....de>
> ---
>  Documentation/vm/hmm.rst                |  2 +-
>  drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c |  7 +++++--
>  drivers/gpu/drm/nouveau/nouveau_svm.c   |  5 ++---
>  include/linux/hmm.h                     |  6 +-----
>  mm/hmm.c                                | 20 +++++---------------
>  5 files changed, 14 insertions(+), 26 deletions(-)

I also don't really like how the API sets up some things in the struct
and some things via arguments, so:

Reviewed-by: Jason Gunthorpe <jgg@...lanox.com>

Jason