linux-kernel - Re: [PATCH v3 00/27] Add support for OpenCAPI Persistent Memory devices

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Message-Id: <83034494d5c3da1fa63b172e844f85d0fec7910a.camel@au1.ibm.com>
Date:   Mon, 24 Feb 2020 15:42:54 +1100
From:   "Alastair D'Silva" <alastair@....ibm.com>
To:     Matthew Wilcox <willy@...radead.org>
Cc:     Dan Williams <dan.j.williams@...el.com>,
        "Aneesh Kumar K . V" <aneesh.kumar@...ux.ibm.com>,
        "Oliver O'Halloran" <oohall@...il.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Frederic Barrat <fbarrat@...ux.ibm.com>,
        Andrew Donnellan <ajd@...ux.ibm.com>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Vishal Verma <vishal.l.verma@...el.com>,
        Dave Jiang <dave.jiang@...el.com>,
        Ira Weiny <ira.weiny@...el.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Rob Herring <robh@...nel.org>,
        Anton Blanchard <anton@...abs.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Mahesh Salgaonkar <mahesh@...ux.vnet.ibm.com>,
        Madhavan Srinivasan <maddy@...ux.vnet.ibm.com>,
        Cédric Le Goater <clg@...d.org>,
        Anju T Sudhakar <anju@...ux.vnet.ibm.com>,
        Hari Bathini <hbathini@...ux.ibm.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Greg Kurz <groug@...d.org>,
        Nicholas Piggin <npiggin@...il.com>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Alexey Kardashevskiy <aik@...abs.ru>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        linux-nvdimm <linux-nvdimm@...ts.01.org>,
        Linux MM <linux-mm@...ck.org>
Subject: Re: [PATCH v3 00/27] Add support for OpenCAPI Persistent Memory
 devices

On Sun, 2020-02-23 at 20:37 -0800, Matthew Wilcox wrote:
> On Mon, Feb 24, 2020 at 03:34:07PM +1100, Alastair D'Silva wrote:
> > V3:
> >   - Rebase against next/next-20200220
> >   - Move driver to arch/powerpc/platforms/powernv, we now expect
> > this
> >     driver to go upstream via the powerpc tree
> 
> That's rather the opposite direction of normal; mostly drivers live
> under
> drivers/ and not in arch/.  It's easier for drivers to get overlooked
> when doing tree-wide changes if they're hiding.

This is true, however, given that it was not all that desirable to have
it under drivers/nvdimm, it's sister driver (for the same hardware) is
also under arch, and that we don't expect this driver to be used on any
platform other than powernv, we think this was the most reasonable
place to put it.

-- 
Alastair D'Silva
Open Source Developer
Linux Technology Centre, IBM Australia
mob: 0423 762 819