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SubjectRE: ordered memory access
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> The case that Manfred brought up was perfectly valid - we could do
> __raw_atomic_foo() functions to do it if there is a need. We could
> also just decide that atomic_foo() does not guarantee ordering.

Since you already have separate functions for memory barriers, I would think
not guarenteeing ordering would be the sensible thing to do. Keep it simple.

IFF it is shown that almost every time you do the atomic_xxx() functions the
code also needs the memory barrier, then you can consider adding this to the
function.

-Bret

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