[RFC 1/3 v3] mm: iommu: An API to unify IOMMU, CPU and device memory management

On Mon, Jul 19, 2010 at 10:55:15AM -0700, Michael Bohan wrote:

On 7/16/2010 12:58 AM, Russell King - ARM Linux wrote:

quoted

As the patch has been out for RFC since early April on the linux-arm-kernel
mailing list (Subject: [RFC] Prohibit ioremap() on kernel managed RAM),
and no comments have come back from Qualcomm folk.

Would it be unreasonable to allow a map request to succeed if the  
requested attributes matched that of the preexisting mapping?

What would be the point of creating such a mapping?