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From: Roland McGrath <roland@redhat.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Mike Frysinger <vapier@gentoo.org>,
       Andrew Morton <akpm@linux-foundation.org>,
       LKML <linux-kernel@vger.kernel.org>,
       Ulrich Drepper <drepper@redhat.com>
Subject: Re: [patch] asm-*/posix_types.h: scrub __GLIBC__
In-Reply-To: Ingo Molnar's message of  Wednesday, 2 January 2008 17:11:08 +0100 <20080102161108.GE21046@elte.hu>
References: <200801021005.33587.vapier@gentoo.org>
	<20080102161108.GE21046@elte.hu>
Message-Id: <20080102194234.8F6EE26F9A0@magilla.localdomain>
Date: Wed,  2 Jan 2008 11:42:34 -0800 (PST)
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1089
Lines: 35

The __GLIBC__ uses look like:

	#if defined(__KERNEL__) || !defined(__GLIBC__) || (__GLIBC__ < 2)

That block does not affect any extant glibc, so we don't care if you remove
those conditions.  Any non-glibc users of thes headers might care, since
they are the ones affected.

TGhe __USE_ALL uses are all the same one:

	typedef struct {
	#if defined(__KERNEL__) || defined(__USE_ALL)
		int	val[2];
	#else /* !defined(__KERNEL__) && !defined(__USE_ALL) */
		int	__val[2];
	#endif /* !defined(__KERNEL__) && !defined(__USE_ALL) */
	} __kernel_fsid_t;

This might matter in the case of a program compiled in strict ISO C mode,
if some ISO C-standard headers wind up including <asm/posix_types.h>.  
In ISO C it is kosher to write:

	#define val die!die!die!
	#include <stdio.h>

though this is not kosher for POSIX applications.


Thanks,
Roland
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