Subject: Re: MMIO and gcc re-ordering issue

From: Alan Cox <[email-masked]>
Date: Tue, 27 May 2008 22:46:51 +0100

On Tue, 27 May 2008 15:53:28 -0600
Matthew Wilcox <[email-masked]> 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