On Thu, Nov 23, 2006 at 09:59:33AM -0600, James Bottomley wrote:
> On Thu, 2006-11-23 at 15:03 +0000, Ralf Baechle wrote:
> > dma_is_consistent() is ill-designed in that it does not have a struct device
> > argument which makes proper support for systems that consist of a mix of
> > coherent and non-coherent DMA devices hard.
>
> At the time the interface was designed, the general consensus was that
> it was easier to recognise incoherent memory regions by their address
> range than by which device they came from. The main proponent of this
> being arm, if I remember rightly.
I don't remember that being particularly discussed, and it seems that
no one has implemented it (but possibly implemented their own stuff
in arch private code.)
--
Russell King
Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/
maintainer of:
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