PCI_DMA_BUS_IS_PHYS  109 arch/x86/include/asm/pci.h #define PCI_DMA_BUS_IS_PHYS (dma_ops->is_phys)
PCI_DMA_BUS_IS_PHYS   34 include/asm-generic/pci.h #define PCI_DMA_BUS_IS_PHYS	(1)