On Tue, Mar 03, 2009 at 10:22:42PM -0500, Rob Evers wrote: > >(1) Add readl following writel from the function that disables interrupts > > Is a memory barrier required after the writel and before the readl to > ensure that the writel executes before the readl on processors other than > x86_64 and ia32? No. Architectures such as PowerPC and Altix which have the potential to issue writes out of order wrt io memory are required to implement barriers in their writel() implementation. -- Matthew Wilcox Intel Open Source Technology Centre "Bill, look, we understand that you're interested in selling us this operating system, but compare it to ours. We can't possibly take such a retrograde step." -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
