Arnd, Am 18.06.2022 um 00:57 schrieb Arnd Bergmann:
From: Arnd Bergmann <arnd@xxxxxxxx> All architecture-independent users of virt_to_bus() and bus_to_virt() have been fixed to use the dma mapping interfaces or have been removed now. This means the definitions on most architectures, and the CONFIG_VIRT_TO_BUS symbol are now obsolete and can be removed. The only exceptions to this are a few network and scsi drivers for m68k Amiga and VME machines and ppc32 Macintosh. These drivers work correctly with the old interfaces and are probably not worth changing.
The Amiga SCSI drivers are all old WD33C93 ones, and replacing virt_to_bus by virt_to_phys in the dma_setup() function there would cause no functional change at all.
drivers/vme/bridges/vme_ca91cx42.c hasn't been used at all on m68k (it is a PCI-to-VME bridge chipset driver that would be needed on architectures that natively use a PCI bus). I haven't found anything that selects that driver, so not sure it is even still in use??
That would allow you to drop the remaining virt_to_bus define from arch/m68k/include/asm/virtconvert.h.
I could submit a patch to convert the Amiga SCSI drivers to use virt_to_phys if Geert and the SCSI maintainers think it's worth the churn.
32bit powerpc is a different matter though. Cheers, Michael
