linux-kernel - Re: ioremap_uc() followed by set_memory_wc()

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Message-ID: <CALCETrXMJNvd0zTjgyM6GF=xm7aL-K2ERX-A0p=46msh54AA7g@mail.gmail.com>
Date:	Tue, 21 Apr 2015 15:09:02 -0700
From:	Andy Lutomirski <luto@...capital.net>
To:	"Luis R. Rodriguez" <mcgrof@...e.com>
Cc:	Andy Walls <awalls@...metrocast.net>,
	Hyong-Youb Kim <hykim@...i.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	Toshi Kani <toshi.kani@...com>,
	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Hal Rosenstock <hal.rosenstock@...il.com>,
	Sean Hefty <sean.hefty@...el.com>,
	Suresh Siddha <sbsiddha@...il.com>,
	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>,
	Mike Marciniszyn <mike.marciniszyn@...el.com>,
	Roland Dreier <roland@...estorage.com>,
	Juergen Gross <jgross@...e.com>,
	Mauro Carvalho Chehab <mchehab@....samsung.com>,
	Borislav Petkov <bp@...e.de>, Mel Gorman <mgorman@...e.de>,
	Vlastimil Babka <vbabka@...e.cz>,
	Davidlohr Bueso <dbueso@...e.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ville Syrjälä <syrjala@....fi>,
	linux-fbdev <linux-fbdev@...r.kernel.org>,
	linux-media@...r.kernel.org, X86 ML <x86@...nel.org>
Subject: Re: ioremap_uc() followed by set_memory_wc() - burrying MTRR

On Tue, Apr 21, 2015 at 3:08 PM, Luis R. Rodriguez <mcgrof@...e.com> wrote:
> On Tue, Apr 21, 2015 at 3:02 PM, Luis R. Rodriguez <mcgrof@...e.com> wrote:
>> Andy, can we live without MTRR support on this driver for future kernels? This
>> would only leave ipath as the only offending driver.
>
> Sorry to be clear, can we live with removal of write-combining on this driver?
>

I personally think so, but a driver maintainer's ack would be nice.

--Andy
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