Re: [PATCH] Document Linux's memory barriers

Andi Kleen
2006-03-07T18:41:04Z

On Tuesday 07 March 2006 19:30, David Howells wrote:

> > You're not supposed to do it this way anyways. The official way to access
> > MMIO space is using read/write[bwlq]
>
> True, I suppose. I should make it clear that these accessor functions imply
> memory barriers, if indeed they do,

I don't think they do.

> and that you should use them rather than
> accessing I/O registers directly (at least, outside the arch you should).

Even inside the architecture it's a good idea.

-Andi