Some cleanup patches for iommu/vt-d.

Yijing Wang (6):
  iommu/vt-d: Use list_for_each_safe() to simplify code
  iommu/vt-d: move up no_iommu and dmar_disabled check
  iommu/vt-d: clear the redundant assignment in dmar_enable_qi
  iommu/vt-d: clear the redundant assignment for domain->nid
  iommu/vt-d: use inline function dma_pte_superpage instead of macros
  iommu/vt-d: fix reference count in iommu_prepare_isa

 drivers/iommu/dmar.c        |    3 ---
 drivers/iommu/intel-iommu.c |   18 ++++++++----------
 2 files changed, 8 insertions(+), 13 deletions(-)


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