Re: [PATCH] mutex: Introduce mutex_cpu_relax()

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On Thu, 2010-10-14 at 17:33 +0200, Gerald Schaefer wrote:

> --- a/arch/s390/Kconfig
> +++ b/arch/s390/Kconfig
> @@ -100,6 +100,7 @@ config S390
>  	select HAVE_KERNEL_BZIP2
>  	select HAVE_KERNEL_LZMA
>  	select HAVE_KERNEL_LZO
> +	select HAVE_MUTEX_CPU_RELAX
>  	select ARCH_INLINE_SPIN_TRYLOCK
>  	select ARCH_INLINE_SPIN_TRYLOCK_BH
>  	select ARCH_INLINE_SPIN_LOCK

>  
> +#ifndef HAVE_MUTEX_CPU_RELAX
> +#define mutex_cpu_relax()	cpu_relax()
> +#endif

Won't KConfig make CONFIG_HAVE_MUTEX_CPU_RELAX from that?

Also, don't you have to first create a dummy Kconfig variable before you
select it?
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