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

[Peter Zijlstra]

On Fri, Sep 18, 2015 at 10:57:32AM +0200, Peter Zijlstra wrote:
> diff --git a/arch/metag/include/asm/atomic_lnkget.h b/arch/metag/include/asm/atomic_lnkget.h
> index 21c4c268b86c..1bd21c933435 100644
> --- a/arch/metag/include/asm/atomic_lnkget.h
> +++ b/arch/metag/include/asm/atomic_lnkget.h
> @@ -3,7 +3,8 @@
>  
>  #define ATOMIC_INIT(i)	{ (i) }
>  
> -#define atomic_set(v, i)		((v)->counter = (i))
> +/* XXX: should be LNKSETD ? */
> +#define atomic_set(v, i)		WRITE_ONCE((v)->counter, (i))
>  
>  #include <linux/compiler.h>
>  

James?
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