Messages in this thread | | | Date | Fri, 8 Sep 2006 20:54:08 -0700 (PDT) | From | Linus Torvalds <> | Subject | Re: Opinion on ordering of writel vs. stores to RAM |
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On Sat, 9 Sep 2006, Paul Mackerras wrote: > > > > although it's quite possible that (a) never makes any sense at all. > > Do you mean (b) never makes sense?
Yes.
> I suspect the best thing at this point is to move the sync in writeX() > before the store, as you suggest, and add an "eieio" before the load > in readX(). That does mean that we are then relying on driver writers > putting in the mmiowb() between a writeX() and a spin_unlock, but at > least that is documented.
Yeah, that sounds reasonable.
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