> This 'merges' the barrier and the write. Or rather, in asm-i386 we could
> do something like:
>
> #define set_mb(addr,val) xchgl(addr,val)
>
> and then use set_barrier().
>
> Sure, but it costs ~8 instructions instead of 2 on ll/sc architectures.
i was not clear enough - this is why i said 'in i386-asm'. Other (saner)
architectures can use normal writes and sane barriers.
-- mingo
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