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/linux-4.4.14/arch/x86/kernel/
Dpci-calgary_64.c294 unsigned long badend; in iommu_free() local
298 badend = DMA_ERROR_CODE + (EMERGENCY_PAGES * PAGE_SIZE); in iommu_free()
299 if (unlikely((dma_addr >= DMA_ERROR_CODE) && (dma_addr < badend))) { in iommu_free()