linux-kernel - Re: [PATCH 03/13] nouveau: pass struct nouveau_svmm to nouveau_range

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Message-ID: <20190730123554.GD24038@mellanox.com>
Date:   Tue, 30 Jul 2019 12:35:59 +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 03/13] nouveau: pass struct nouveau_svmm to
 nouveau_range_fault

On Tue, Jul 30, 2019 at 08:51:53AM +0300, Christoph Hellwig wrote:
> This avoid having to abuse the vma field in struct hmm_range to unlock
> the mmap_sem.

I think the change inside hmm_range_fault got lost on rebase, it is
now using:

                up_read(&range->hmm->mm->mmap_sem);

But, yes, lets change it to use svmm->mm and try to keep struct hmm
opaque to drivers

Jason