Re: [PATCH] Mutilated form of Andi Kleen's AMD prefetch errata patch

[Andi Kleen]

> Why is it not sufficient to do something like:
> 
> 	if (!(error_code & 4) && is_prefetch(...))
> 		return;
> 
> near the start of do_page_fault()?

That could fault recursively when the __get_user in is_prefetch faults. 
You would have to check the exception table first too.

-Andi
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