Re: Do cpu-endian MMIO accessors exist?

[Arnd Bergmann]

On Tuesday 21 July 2009, Jiri Slaby wrote:
> On 07/21/2009 11:15 PM, Arnd Bergmann wrote:
> > __raw_readl is not a replacement for real accessors like
> > ioread32 or in_be32, because it does not synchronize with the
> > instruction stream.
> 
> Aha, I see now. I guess it's a bug that ioread/write* on sh are not with
> barriers?

That depends on how that architecture defines its bus interface.
On many simple architectures, you do not need any synchronization
operations.

	Arnd <><
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