linux-kernel - Re: [PATCH] arch/arm/Kconfig: Make UIO available on ARM architecture

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Message-ID: <47B0FBBD.9060009@snapgear.com>
Date:	Tue, 12 Feb 2008 11:51:57 +1000
From:	Greg Ungerer <gerg@...pgear.com>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
CC:	David Woodhouse <dwmw2@...radead.org>, Greg KH <greg@...ah.com>,
	linux-kernel@...r.kernel.org,
	Christoph Hellwig <hch@...radead.org>,
	linux-arm-kernel@...ts.arm.linux.org.uk
Subject: Re: [PATCH] arch/arm/Kconfig: Make UIO available on ARM architecture


Russell King - ARM Linux wrote:
> On Fri, Feb 08, 2008 at 10:43:42AM +0000, David Woodhouse wrote:
>> On Fri, 2008-02-08 at 10:23 +0000, Russell King - ARM Linux wrote:
>>> That would be misleading though - !CPU_CP15_MMU does not mean we
>>> support unaligned accesses.  It means that we may have no way to
>>> support fixing up unaligned accesses.
>> Doesn't that mean you should disallow MTD (or at least 16-bit NOR flash)
>> if !CPU_CP15_MMU, then? But at the moment you allow it?
> 
> Ask Hyok or Greg Ungerer.

I would agree that it means disabling 16-bit NOR flash, but the 8-bit
case should be fine right?

A complete disable of MTD seems like overkill. A more fine grained
approach would be better.

Regards
Greg



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