linux-kernel - Re: [PATCH 1/1] edac x38: new MC driver module

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Message-ID: <20081118121620.GB8625@linux-mips.org>
Date:	Tue, 18 Nov 2008 12:16:20 +0000
From:	Ralf Baechle <ralf@...ux-mips.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Hitoshi Mitake <h.mitake@...il.com>,
	Hitoshi Mitake <mitake@...stcom.com>,
	Doug Thompson <norsk5@...oo.com>, dougthompson@...ssion.com,
	linux-kernel@...r.kernel.org, ktaka@...stcom.com,
	linux-arch@...r.kernel.org
Subject: Re: [PATCH 1/1] edac x38: new MC driver module

On Sun, Nov 09, 2008 at 11:26:46AM -0800, Andrew Morton wrote:

> Perhaps it would be better to have a CONFIG_ARCH_HAS_READQ and to then
> disable these drivers on the architectures which don't provide
> readq/writeq support.

And we also need to define the exact semantics.  Questions coming to mind:

  o are implementations performing 2 32-bit accesses acceptable?
  o if so, what ordering for the two accesses is acceptable?

  Ralf
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