tree 21f0dc5f5feb140d8566e22fa3c7ecac009e27f3
parent 024e8ac04453b3525448c31ef39848cf675ba6db
author Joerg Roedel <joerg.roedel@amd.com> 1216990678 +0200
committer Ingo Molnar <mingo@elte.hu> 1217079785 +0200

iommu: add iommu_num_pages helper function

Calculating the number of pages from given address and length numbers is a task
required in multiple IOMMU implementations. So implement this as a generic
function into the IOMMU helper code.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: robert.richter@amd.com
Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Ingo Molnar <mingo@elte.hu>