IOMMU_PRIV
prot |= IOMMU_PRIV;
prot |= IOMMU_PRIV;
prot |= IOMMU_PRIV;
prot |= IOMMU_PRIV;
if (!(prot & IOMMU_PRIV))
if (!(prot & IOMMU_PRIV))
IOMMU_READ | IOMMU_WRITE | IOMMU_PRIV, GFP_KERNEL);