pci_bus_dma_tag   262 arch/i386/i386/mainbus.c 		mba.mba_pba.pba_dmat = &pci_bus_dma_tag;
pci_bus_dma_tag   155 arch/i386/pci/pci_machdep.c struct i386_bus_dma_tag pci_bus_dma_tag = {
pci_bus_dma_tag    58 arch/i386/pci/pci_machdep.h extern struct i386_bus_dma_tag pci_bus_dma_tag;