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> Umm, so is this patch really needed? Where did the patch come from -- > is it needed to fix something actually seen, or was it written just > based on some theoretical understanding?>> I'm confused...>> - R. The patch is needed. We've seen it on the real system. We did fix it on the real system. ...and it conforms to theory... although theory is a bit confusing here. let me try to summarize: ioremap checks for 64k boundary (actually page boundary) nopage does H_ENTER in 4k granularity if it's configured like that for a certain type of POWER processor. so you have to adjust the ioremap to page boundary, and THEN access at the offset within the 64k. Took quite a while until we understood that code path.... ;-) Christoph R. - 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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