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xen-devel
[Xen-devel] Re: [patch] pae: tlbflush linear page table updates
Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> writes:
>
> The compiler will never alias inputs. In this case it is forced to
> alias the output constraint with input retval, and so the output
> cannot alias with any other input (which would be an error).
Actually it will sometimes. That is what the "early clobber" (&)
prevents. Perhaps it should be used here.
-Andi
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