[PATCH 1/1] Use cachable mapping for i915 opregion.

Chris Wilson chris at chris-wilson.co.uk
Sun Jan 23 10:45:54 PST 2011

On Sun, 23 Jan 2011 18:23:34 +0100, Michael Karcher <kernel at mkarcher.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.

Chris Wilson, Intel Open Source Technology Centre

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