kernels/linux-2.4.0/include/asm-i386/pci.h
/* Unmap a single streaming mode DMA translation.  The dma_addr and size
 * must match what was provided for in a previous pci_map_single call.  All
 * other usages are undefined.
 *
 * After this call, reads by the cpu to the buffer are guarenteed to see
 * whatever the device wrote there.
 */
Unmap a single streaming mode DMA translation.  The dma_addr and size
must match what was provided for in a previous pci_map_single call.  All
other usages are undefined.

After this call, reads by the cpu to the buffer are guarenteed to see
whatever the device wrote there.
Unmap a single streaming mode DMA translation . The dma_addr and size must match what was provided for in a previous pci_map_single call . All other usages are undefined . After this call reads by the cpu to the buffer are guarenteed to see whatever the device wrote there .
extern inline void pci_unmap_single(struct pci_dev *hwdev, dma_addr_t dma_addr,
				    size_t size, int direction)
{
	if (direction == PCI_DMA_NONE)
		BUG();
}
extern inline void pci_unmap_single ( struct pci_dev * hwdev , dma_addr_t dma_addr , size_t size , int direction ) { if ( direction == PCI_DMA_NONE ) BUG ( ) ; }
Unmap a single streaming mode DMA translation.
Unmap a single streaming mode DMA translation .
/* Nothing to do */