From: "Raghavendra Koushik" <[EMAIL PROTECTED]> Date: Thu, 7 Jul 2005 18:06:19 -0700
> wmb() is to ensure ordered PIO writes. wmb() does no such thing. It only has influence on load and store instructions done by the local processor, it has no effect on what the PCI bus may do with PIO writes (ie. post them). If you need a PIO to complete in a specific order, you have to read it back. If you need PIO operations to occur in a specific order wrt. cpu memory operations, mmiowb() is what you need to use. - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
