Re: DAC960 in 2.5.38, with new changes
Daniel Phillips (phillips@arcor.de)
Mon, 23 Sep 2002 23:31:13 +0200
On Monday 23 September 2002 23:24, David Mosberger wrote:
> >>>>> On Mon, 23 Sep 2002 13:57:08 -0700 (PDT), "David S. Miller" <davem@redhat.com> said:
>
> >> On many platforms, two consequetive __raw_writel()'s might even
> >> combine to an atomic 64-bit store to PCI space. :-)
>
> Yes, but that's no guarantee.
>
> >> I don't think the proposed 32-bit behavior is off the mark, and
> >> anyways x86 can actually make the 64-bit store I believe if it
> >> wants at least on more recent processors.
>
> Surely we wouldn't want to define a new API that can't be supported on
> all 32-bit platforms, no? Perhaps writeq_nonatomic()?
Why attempt to write 8 bytes on ia32 when only 4 are needed?
--
Daniel
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