Re: [tip:x86/urgent] x86: mm: Read cr2 before prefetching themmap_lock

[Linus Torvalds]

On Tue, 16 Jun 2009, tip-bot for Ingo Molnar wrote:
> 
> It turns out that in current upstream we do exactly that:
> 
> 	prefetchw(&mm->mmap_sem);
> 
> 	/* Get the faulting address: */
> 	address = read_cr2();
> 
> This is not good.

Ack.

		Linus
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