linux-kernel - Re: [PATCH 01/22] mm: remove the unused ARCH_HAS_HMM

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Message-ID: <20190613183024.GN22062@mellanox.com>
Date:   Thu, 13 Jun 2019 18:30:28 +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 01/22] mm: remove the unused ARCH_HAS_HMM_DEVICE Kconfig
 option

On Thu, Jun 13, 2019 at 11:43:04AM +0200, Christoph Hellwig wrote:
> Signed-off-by: Christoph Hellwig <hch@....de>
> ---
>  mm/Kconfig | 10 ----------
>  1 file changed, 10 deletions(-)

So long as we are willing to run a hmm.git we can merge only complete
features going forward.

Thus we don't need the crazy process described in the commit message
that (deliberately) introduced this unused kconfig.

I also tried to find something in-flight for 5.3 that would need this
and found nothing

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

Jason