Re: MMIO and gcc re-ordering issue

Alan Cox
2008-05-27T22:01:18Z

On Tue, 27 May 2008 15:53:28 -0600
Matthew Wilcox <matthew@wil.cx> wrote:

> On Tue, May 27, 2008 at 10:38:22PM +0100, Alan Cox wrote:
> > > re-ordering, even though I doubt it will be visible in practice. So if you
> > > use the "__" versions, you'd better have barriers even on x86!
> >
> > Are we also going to have __ioread*/__iowrite* ?
>
> Didn't we already define ioread*() to have loose semantics?

The ATA layer doesn't think so.

Alan