linux-kernel - Re: [PATCH] arm64: Define HAVE_ARCH_PIO

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Date:	Tue, 14 Jul 2015 10:54:25 -0700
From:	David Daney <ddaney@...iumnetworks.com>
To:	Will Deacon <will.deacon@....com>
CC:	David Daney <ddaney.cavm@...il.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Catalin Marinas <Catalin.Marinas@....com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Robert Richter <rrichter@...ium.com>,
	David Daney <david.daney@...ium.com>
Subject: Re: [PATCH] arm64: Define HAVE_ARCH_PIO_SIZE and related symbols.

On 07/14/2015 10:04 AM, Will Deacon wrote:
> Hi David,
>
> On Tue, Jul 14, 2015 at 05:58:20PM +0100, David Daney wrote:
[...]
> We only get this definition if CONFIG_GENERIC_IOMAP=y. Why is that
> selected?
>

OK, Good question.

The original patch was against 3.18, but  commit 09a5723983e (arm64: Use 
include/asm-generic/io.h) changed some of this, so it may need 
reconsideration.

Let me reevaluate this patch.

Thanks,
David Daney


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