linux-kernel - Re: [PATCH] perf tools: Prevent from BITS_PER

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Message-ID: <1261214767.20899.697.camel@laptop>
Date:	Sat, 19 Dec 2009 10:26:07 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	Ingo Molnar <mingo@...e.hu>, LKML <linux-kernel@...r.kernel.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Paul Mackerras <paulus@...ba.org>
Subject: Re: [PATCH] perf tools: Prevent from BITS_PER_LONG redefinition

On Fri, 2009-12-18 at 23:05 +0100, Frederic Weisbecker wrote:
> +#ifndef BITS_PER_LONG
>  /* CHECKME: Not sure both always match */
>  #define BITS_PER_LONG  __WORDSIZE
> +#endif 

Why use __WORDSIZE if you're not sure?

(8*sizeof(long)) is simple and unambiguous.

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