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Date: Thu, 6 Dec 2007 21:27:44 -0600
From: Josh Boyer <jwboyer@linux.vnet.ibm.com>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Subject: Re: [PATCH 23/25] powerpc: Rework 4xx clock probing in boot wrapper
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On Thu, 06 Dec 2007 19:00:22 +1100
Benjamin Herrenschmidt <benh@kernel.crashing.org> wrote:

> Index: linux-work/arch/powerpc/boot/reg.h
> ===================================================================
> --- linux-work.orig/arch/powerpc/boot/reg.h	2007-12-03 14:26:09.000000000 +1100
> +++ linux-work/arch/powerpc/boot/reg.h	2007-12-03 14:26:09.000000000 +1100
> @@ -24,6 +24,14 @@ static inline u32 mfpvr(void)
>  				: "=r" (rval)); rval; })
>  #define mtspr(rn, v)	asm volatile("mtspr " __stringify(rn) ",%0" : : "r" (v))
> 
> +#define __stringify_1(x)	#x
> +#define __stringify(x)		__stringify_1(x)
> +
> +#define mfspr(rn)	({unsigned long rval; \
> +			asm volatile("mfspr %0," __stringify(rn) \
> +				: "=r" (rval)); rval; })
> +#define mtspr(rn, v)	asm volatile("mtspr " __stringify(rn) ",%0" : : "r" (v))
> +

You felt like duplicating this?  It was added in the previous patch. :)

josh