linux-kernel - Re: [PATCH 1/1] Use cachable mapping for i915 opregion.

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Date:	Sun, 23 Jan 2011 18:45:54 +0000
From:	Chris Wilson <chris@...is-wilson.co.uk>
To:	Michael Karcher <kernel@...rcher.dialup.fu-berlin.de>,
	airlied@...ux.ie, dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] Use cachable mapping for i915 opregion.

On Sun, 23 Jan 2011 18:23:34 +0100, Michael Karcher <kernel@...rcher.dialup.fu-berlin.de> wrote:
> The opregion is a shared memory region between ACPI and the graphics
> driver. As the ACPI mapping has been changed to cachable in commit
> 6d5bbf00d251cc73223a71422d69e069dc2e0b8d, mapping the intel opregion
> non-cachable now fails. As no bus-master hardware is involved in the
> opregion, cachable map should do no harm.

Satisfied myself that is indeed equivalent to use the newly introduced
acpi_os_ioremap for this purpose and applied to -fixes.
Thanks,
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre
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