John Baldwin <> wrote:
>There is the __compiler_membar() macro in <sys/cdefs.h> that you could
>use if 
>this code is x86-specific (and thus knows it only needs a compiler

Ah. Thanks. This will do. Something like access_once would be perfect, though.

I'll post an updated patch that does not duplicate code that is in xen/ 
soonish. Didn't get around to testing it the last days.

Out of office. Please excuse my brevity.
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