pfnmerge 2202 drivers/iommu/intel-iommu.c unsigned long pfnmerge; pfnmerge 2210 drivers/iommu/intel-iommu.c pfnmerge = iov_pfn | phy_pfn; pfnmerge 2212 drivers/iommu/intel-iommu.c while (support && !(pfnmerge & ~VTD_STRIDE_MASK)) { pfnmerge 2216 drivers/iommu/intel-iommu.c pfnmerge >>= VTD_STRIDE_SHIFT;