Re: [PATCH] Document Linux's circular buffering capabilities

[Stefan Richter]

David Howells wrote:
> How about adding a bit:
> 
>  Note the use of ACCESS_ONCE() in both algorithms to read the opposition index.
>  This prevents the compiler from discarding and reloading its cached value -
> -which some compilers will do across smp_read_barrier_depends().
> +which some compilers will do across smp_read_barrier_depends().  This isn't
> +strictly needed if you can be sure that the opposition index will _only_ be
> +used the once.

Yes, thanks.  (The last "the" is superfluous.)
-- 
Stefan Richter
-=====-==-=- --== -====
http://arcgraph.de/sr/
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