On Sunday, January 23, 2011, Chris Wilson wrote: > 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.
However, it might be better to use acpi_os_ioremap() in case we decide to go back to ioremap() for some reason. For now, ioremap_cache() seems fine, but ... Thanks, Rafael
