linux-kernel - Re: [PATCH 61/7] x86/pci: add cap

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Date:	Fri, 11 Dec 2009 18:16:43 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Yinghai Lu <yinghai@...nel.org>
CC:	Ingo Molnar <mingo@...e.hu>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	Gertjan van Wingerde <gwingerde@...il.com>
Subject: Re: [PATCH 61/7] x86/pci: add cap_4g

On 12/11/2009 06:11 PM, Yinghai Lu wrote:
>  
> +static inline u64 cap_4g(u64 val)
> +{
> +	if (sizeof(resource_size_t) >= sizeof(u64))
> +		return val;
> +
> +	if (val < 1ULL)
> +		return val;
> +
> +	return 0xffffffff;
> +}
>  #endif

How about:

static inline resource_size_t cap_resource(u64 val)
{
	if (val > ~(resource_size_t)0)
		return ~(resource_size_t)0;
	else
		return val;
}


-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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