Re: [PATCH v2 3/3] arch/*/: remove CONFIG_VIRT_TO_BUS

[Michael Schmitz]

Hi Geert,

On 27/06/22 20:26, Geert Uytterhoeven wrote:
> Hi Michael,
>
> On Sat, Jun 18, 2022 at 3:06 AM Michael Schmitz <schmitzmic@xxxxxxxxx> wrote:
> > 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.
> FTR, the sgiwd93 driver use dma_map_single().

Thanks! From what I see, it doesn't have to deal with bounce buffers 
though?

Cheers,

    Michael


> Gr{oetje,eeting}s,
>
>                          Geert
>
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
>
> In personal conversations with technical people, I call myself a hacker. But
> when I'm talking to journalists I just say "programmer" or something like that.
>                                  -- Linus Torvalds