Re: [PATCH] Define wc_wmb, a write barrier for PCI write combining

[Christopher Friesen]

linux-os (Dick Johnson) wrote:

> Also, the
> PCI bus is a FIFO. Nothing gets reordered.

The CPU itself can reorder the write before it hits the PCI bus.  I 
don't think x86 will do this, but others will.

Chris
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