> But, having those flushes won't hurt either.  What was the conclusion of
> mmio <-> spinlock sync discussion?  I always feel kind of uncomfortable
> about readl() flushes.  I think they're too subtle.

those are orthogonal!
The posting flushes have nothing to do with spinlock-vs-mmio; that
discussion was about the CPU, while posting flushes are about the
chipset / bridges / etc....

> 
-- 
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