From: Andreas Schwab <schwab@suse.de>
To: =?iso-8859-1?Q?J=F6rn?= Engel <joern@logfs.org>
Cc: Alexey Dobriyan <adobriyan@gmail.com>, Sam Ravnborg <sam@ravnborg.org>,
       Andrew Morton <akpm@linux-foundation.org>,
       linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: [Patch] Always include <linux/types.h>
References: <491073BB.4000900@panasas.com>
	<1225817069-5969-1-git-send-email-bharrosh@panasas.com>
	<20081104180347.GA9818@uranus.ravnborg.org>
	<20081105163941.GB6561@logfs.org>
	<20081105172312.GA10585@x200.localdomain>
	<20081105191628.GC6561@logfs.org>
Date: Wed, 05 Nov 2008 20:48:36 +0100
In-Reply-To: <20081105191628.GC6561@logfs.org> (=?iso-8859-1?Q?=22J=F6rn?=
 Engel"'s message of
	"Wed, 5 Nov 2008 20:16:29 +0100")
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J?rn Engel <joern@logfs.org> writes:

> My hope was actually to speed up compilation.  If the average c file
> includes 10 headers, on types.h will get included by most of them,
> possibly multiple times.  Each run after the first still has to parse
> the whole file, just to drop everything between  #ifndef _LINUX_TYPES_H
> and #endif.

Actually GCC is smart enought to note the bracketing and avoid even
looking at it a second time.

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux Products GmbH, Maxfeldstra?e 5, 90409 N?rnberg, Germany
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"And now for something completely different."
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