pci_swiotlb_detect_4gb 66 arch/x86/include/asm/iommu_table.h __IOMMU_INIT(_detect, pci_swiotlb_detect_4gb, NULL, NULL, 0) pci_swiotlb_detect_4gb 69 arch/x86/include/asm/iommu_table.h __IOMMU_INIT(_detect, pci_swiotlb_detect_4gb, NULL, NULL, 1) pci_swiotlb_detect_4gb 9 arch/x86/include/asm/swiotlb.h extern int __init pci_swiotlb_detect_4gb(void);