linux-kernel - Re: [PATCH 10/10] ocxl: Conditionally bind SCM devices to the generic OCXL driver

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Date:   Fri, 25 Oct 2019 23:43:33 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Alastair D'Silva <alastair@....ibm.com>
Cc:     alastair@...ilva.org, Oscar Salvador <osalvador@...e.com>,
        Michal Hocko <mhocko@...e.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        David Hildenbrand <david@...hat.com>,
        Alexey Kardashevskiy <aik@...abs.ru>,
        Wei Yang <richard.weiyang@...il.com>,
        Keith Busch <keith.busch@...el.com>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Paul Mackerras <paulus@...ba.org>,
        Ira Weiny <ira.weiny@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Pavel Tatashin <pasha.tatashin@...een.com>,
        Dave Jiang <dave.jiang@...el.com>, linux-nvdimm@...ts.01.org,
        Vishal Verma <vishal.l.verma@...el.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Anju T Sudhakar <anju@...ux.vnet.ibm.com>,
        Hari Bathini <hbathini@...ux.ibm.com>,
        Mahesh Salgaonkar <mahesh@...ux.vnet.ibm.com>,
        Andrew Donnellan <ajd@...ux.ibm.com>,
        Arnd Bergmann <arnd@...db.de>, Greg Kurz <groug@...d.org>,
        Nicholas Piggin <npiggin@...il.com>, Qian Cai <cai@....pw>,
        Cédric Le Goater <clg@...d.org>,
        Dan Williams <dan.j.williams@...el.com>,
        Allison Randal <allison@...utok.net>,
        David Gibson <david@...son.dropbear.id.au>, linux-mm@...ck.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org,
        Vasant Hegde <hegdevasant@...ux.vnet.ibm.com>,
        Frederic Barrat <fbarrat@...ux.ibm.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH 10/10] ocxl: Conditionally bind SCM devices to the
 generic OCXL driver

On Fri, Oct 25, 2019 at 03:47:05PM +1100, Alastair D'Silva wrote:
> From: Alastair D'Silva <alastair@...ilva.org>
> 
> This patch allows the user to bind OpenCAPI SCM devices to the generic OCXL
> driver.

This completely misses any explanation of why you'd want that.  The
what is rather obvious from the patch.

> +config OCXL_SCM_GENERIC
> +	bool "Treat OpenCAPI Storage Class Memory as a generic OpenCAPI device"
> +	default n

n is the default default.