[ NOTE: The virt_to_bus() and bus_to_virt() functions have been
superseded by the functionality provided by the PCI DMA interface
- (see Documentation/PCI/PCI-DMA-mapping.txt). They continue
+ (see Documentation/DMA-API-HOWTO.txt). They continue
to be documented below for historical purposes, but new code
must not use them. --davidm 00/12/12 ]