linux-kernel - Re: [PATCH] x86: fix apic.h unused but set warnings v2

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Date:	Mon, 8 Nov 2010 22:39:49 +0100 (CET)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Andi Kleen <andi@...stfloor.org>
cc:	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	Andi Kleen <ak@...ux.intel.com>, x86@...nel.org
Subject: Re: [PATCH] x86: fix apic.h unused but set warnings v2

On Mon, 8 Nov 2010, Andi Kleen wrote:
>  static inline u32 native_apic_msr_read(u32 reg)
>  {
> -	u32 low, high;
> +	u32 low;
>  
>  	if (reg == APIC_DFR)
>  		return -1;
>  
> -	rdmsr(APIC_BASE_MSR + (reg >> 4), low, high);
> -	return low;
> +	rdmsrl(APIC_BASE_MSR + (reg >> 4), low);
> +	return (u32)low;

What's the point of casting u32 to u32 ?

Thanks,

	tglx
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