[PATCH v5 2/9] ethdev: add common counters for statistics

[Wathsala Wathawana Vithanage]

> +		packets = rte_counter64_fetch(&counters->packets);
> +		bytes = rte_counter64_fetch(&counters->bytes);
> +		errors = rte_counter64_fetch(&counters->errors);
> +
> +		rte_compiler_barrier();
> +
> +		stats->ipackets += packets;
> +		stats->ibytes += bytes;
> +		stats->ierrors += errors;
> +

there seems to be a dependency chain in the above loads and subsequent stores.
If that's the case what's the purpose of the compiler barrier?

--wathsala