Merge git://git.infradead.org/iommu-2.6

* git://git.infradead.org/iommu-2.6:
  intel-iommu: Fix 32-bit build warning with __cmpxchg()
  intr-remap: allow disabling source id checking

diff --cc Documentation/kernel-parameters.txt
Simple merge

diff --cc drivers/pci/intel-iommu.c
Simple merge

diff --cc drivers/pci/intr_remapping.c
Simple merge