linux-kernel - Re: [PATCH 17/22] mm: remove hmm_devmem

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Message-ID: <20190613194239.GX22062@mellanox.com>
Date:   Thu, 13 Jun 2019 19:42:43 +0000
From:   Jason Gunthorpe <jgg@...lanox.com>
To:     Christoph Hellwig <hch@....de>
CC:     Dan Williams <dan.j.williams@...el.com>,
        Jérôme Glisse <jglisse@...hat.com>,
        Ben Skeggs <bskeggs@...hat.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>,
        "linux-nvdimm@...ts.01.org" <linux-nvdimm@...ts.01.org>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 17/22] mm: remove hmm_devmem_add

On Thu, Jun 13, 2019 at 11:43:20AM +0200, Christoph Hellwig wrote:
> There isn't really much value add in the hmm_devmem_add wrapper.  Just
> factor out a little helper to find the resource, and otherwise let the
> driver implement the dev_pagemap_ops directly.

Was this commit message written when other patches were squashed in
here? I think the helper this mentions was from an earlier patch

> Signed-off-by: Christoph Hellwig <hch@....de>
> ---
>  Documentation/vm/hmm.rst |  26 --------
>  include/linux/hmm.h      | 129 ---------------------------------------
>  mm/hmm.c                 | 115 ----------------------------------
>  3 files changed, 270 deletions(-)

I looked for in-flight patches that might be using these APIs and
found nothing. To be sent patches can use the new API with no loss in
functionality...

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

Jason