* H. Peter Anvin [off-list ref] wrote:

On October 5, 2015 1:22:44 PM PDT, Linus Torvalds [off-list ref] wrote:

quoted

We could probably do them outside the loop, rather than tightly around the 
actual move instructions. Peter (hpa), is there some sane interface to try to 
do that?

There are... in particular the get_user_try/catch mechanism, used among other 
things by the signal handing, as well as the copy functions (I don't have the 
original code in front of me so I don't have the context which would be 
appropriate.)

Yes, but note that those interfaces are x86 only at the moment, so they'd have to 
be factored out and generalized before we can use it in generic code.

Thanks,

	Ingo