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    SubjectRe: [Wbsd-devel] [PATCH 540] MMC_WBSD depends on ISA
    On Sat, 29 Jan 2005, Pierre Ossman wrote:
    > Christoph Hellwig wrote:
    > > > > Russell, please undo this patch. isa_virt_to_bus() is not dependent on
    > > > > CONFIG_ISA. It causes problems on x86_64 platforms which cannot enable
    > > > > ISA support.
    > >
    > > Actually it is, x86_64 just refuses to set CONFIG_ISA despite having
    > > isa-like devices.
    > >
    > > Either way a new driver shouldn't use isa_virt_to_bus at all but rather
    > > use the proper DMA API and all those problems go away.
    > >
    > The problem was that the DMA API didn't work for x86_64 when I wrote the
    > driver. I see now that it has been fixed.
    > isa_virt_to_bus still works even though CONFIG_ISA is not configured. So I
    > still think that the ISA dependency should be removed.

    ... which makes it selectable again on all platforms that don't have ISA and
    don't provide isa_virt_to_bus(), where it still breaks.

    Please don't remove the dependency...

    > I'll move to the new API when I have the time to properly test it.

    .. but change it to e.g. `depends on ISA || X86_64', until you have moved it to
    the new API.



    Geert Uytterhoeven -- There's lots of Linux beyond ia32 --

    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
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