AMD IOMMU updates

Hi,

this patch series contain updates to the AMD IOMMU driver currently in
tip/master. The updates are mostly added comments and fixes for objections by
Andrew Morton. Some of Andrews objections are not yet fixed (mostly the ones
where I have to touch other subsytems too). The patch series also contains a
small bugfix in device table allocation.

Regards,

Joerg

diffstat (as I said, most of this are comments):

 arch/x86/kernel/amd_iommu.c       |  229 ++++++++++++++++++++++++--
 arch/x86/kernel/amd_iommu_init.c  |  328 ++++++++++++++++++++++++++++---------
 include/asm-x86/amd_iommu_types.h |  114 ++++++++++++-
 3 files changed, 577 insertions(+), 94 deletions(-)