On Mon, Nov 03, 2014 at 11:56:24PM +0800, Amos Kong wrote:
>
> @@ -98,6 +99,8 @@ static inline void cleanup_rng(struct kref *kref)
>  
>       if (rng->cleanup)
>               rng->cleanup(rng);

You need a compiler barrier here to prevent reordering.

> +     rng->cleanup_done = true;

Thanks,
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