Re: [PATCH] kernel: fix data race in put_pid

[Peter Zijlstra]

On Fri, Sep 18, 2015 at 01:56:37PM +0200, Peter Zijlstra wrote:
> +#ifndef atomic64_read_ctrl
> +static inline int atomic64_read_ctrl(atomic64_t *v)
> +{
> +	int val = atomic64_read(v);

Duh

	long long...

> +	smp_read_barrier_depends(); /* Enforce control dependency. */
> +	return val;
> +}
> +#endif
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