Documentation/DMA-API-HOWTO.txt 2

[Peter Senna Tschudin]

This was edited in 2010, but the original is more than 9 years old,
and still there are some drivers using virt_to_bus() and
bus_to_virt().

-- // --
All drivers should be using these interfaces with no exceptions.  It
is planned to completely remove virt_to_bus() and bus_to_virt() as
they are entirely deprecated.  Some ports already do not provide these
as it is impossible to correctly support them.
-- // --

Files calling virt_to_bus:
./drivers/atm/ambassador.c
./drivers/atm/firestream.c
./drivers/atm/horizon.c
./drivers/atm/zatm.c
./drivers/block/swim3.c
./drivers/isdn/hisax/netjet.c
./drivers/media/pci/zoran/zoran_device.c
./drivers/media/pci/zoran/zoran_driver.c
./drivers/net/appletalk/ltpc.c
./drivers/net/ethernet/amd/au1000_eth.c
./drivers/net/ethernet/apple/bmac.c
./drivers/net/ethernet/apple/mace.c
./drivers/net/ethernet/dec/tulip/de4x5.c
./drivers/net/ethernet/i825xx/82596.c
./drivers/net/ethernet/sgi/ioc3-eth.c
./drivers/net/irda/au1k_ir.c
./drivers/net/irda/donauboe.c
./drivers/net/wan/cosa.c
./drivers/net/wan/lmc/lmc_main.c
./drivers/net/wan/z85230.c
./drivers/scsi/a2091.c
./drivers/scsi/a3000.c
./drivers/scsi/advansys.c
./drivers/scsi/gvp11.c
./drivers/scsi/mvme147.c
./drivers/staging/comedi/drivers/das1800.c
./drivers/staging/comedi/drivers/dt282x.c
./drivers/staging/comedi/drivers/ni_at_a2150.c
./drivers/staging/comedi/drivers/ni_labpc_isadma.c
./drivers/staging/comedi/drivers/pcl812.c
./drivers/staging/comedi/drivers/pcl816.c
./drivers/staging/comedi/drivers/pcl818.c
./drivers/staging/netlogic/xlr_net.c
./drivers/staging/slicoss/slicoss.c
./drivers/tty/serial/cpm_uart/cpm_uart_cpm2.c
./drivers/vme/bridges/vme_ca91cx42.c

Files calling bus_to_virt:
./drivers/atm/ambassador.c
./drivers/atm/firestream.c
./drivers/atm/horizon.c
./drivers/atm/zatm.c
./drivers/isdn/hisax/netjet.c
./drivers/media/pci/zoran/zoran_driver.c
./drivers/net/ethernet/apple/bmac.c
./drivers/net/ethernet/apple/mace.c
./drivers/scsi/BusLogic.c
./drivers/scsi/dpt_i2o.c
./drivers/staging/netlogic/xlr_net.c

Should the 'with no exceptions' be enforced?

-- 
Peter