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Subject: Re: [PATCH v12 13/22] selftests/vm: powerpc implementation for
 generic abstraction
To: Ram Pai <linuxram@us.ibm.com>, shuahkh@osg.samsung.com,
 linux-kselftest@vger.kernel.org
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From: Dave Hansen <dave.hansen@intel.com>
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Date: Fri, 16 Mar 2018 15:23:28 -0700
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On 02/21/2018 05:55 PM, Ram Pai wrote:
>  static inline u32 pkey_to_shift(int pkey)
>  {
> +#if defined(__i386__) || defined(__x86_64__) /* arch */
>  	return pkey * PKEY_BITS_PER_PKEY;
> +#elif __powerpc64__ /* arch */
> +	return (NR_PKEYS - pkey - 1) * PKEY_BITS_PER_PKEY;
> +#endif /* arch */
>  }

I really detest the #if #else style.  Can't we just have a pkey_ppc.h
and a pkey_x86.h or something?