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Bryan O'Sullivan wrote: > On Tue, 2006-02-28 at 05:01 -0500, Jes Sorensen wrote: > > >>Could you explain why the current mmiowb() API won't suffice for this? >>It seems that this is basically trying to achieve the same thing.> > > It's a no-op on every arch I care about:> > #define mmiowb()> > Which makes it useless. Also, based on the comments in the qla driver, > mmiowb() seems to have inter-CPU ordering semantics that I don't want. > I'm thus hesitant to appropriate it for my needs. The fact that it's a no-op may simply be because nobody on a specific arch got to the point where it made sense to define it yet. Anyway, based on Jesse and Jeremy's comments, then maybe the semantics here are different. However I do think the name wc_wmb() isn't quite defining it. If it's only to be used on mmio space, something like mmio_wc_wmb() would probably be more descriptive. Cheers, Jes - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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