On Fri, 2015-09-18 at 13:22 +0200, Peter Zijlstra wrote:
...
>
> +#ifndef atomic_read_ctrl
> +static inline int atomic_read_ctrl(atomic_t *v)
const atomic_t *v
> +{
> + int val = atomic_read(v);
> + smp_read_barrier_depends(); /* Enforce control dependency. */
> + return val;
> +}
> +#endif
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