On Tue, Aug 14, 2007 at 03:34:25PM +1000, Nick Piggin wrote:
quoted text
>
> What do you think of this crazy idea?
> 
> /* Enforce a compiler barrier for only operations to location X.
>  * Call multiple times to provide an ordering between multiple
>  * memory locations. Other memory operations can be assumed by
>  * the compiler to remain unchanged and may be reordered
>  */
> #define order(x) asm volatile("" : "+m" (x))

Yes this is a very good idea.  This also makes it explicit
that the coder is depending on this rather than the more
vague connotations of atomic_read.

Cheers,
-- 
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