linux-kernel - Re: {PATCH] fix __packed in exported kernel headers

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Message-ID: <4E0CD64D.406@zytor.com>
Date:	Thu, 30 Jun 2011 13:02:21 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Mike Frysinger <vapier@...too.org>
CC:	Arnd Bergmann <arnd@...db.de>,
	Markus Trippelsdorf <markus@...ppelsdorf.de>,
	Michal Marek <mmarek@...e.cz>, Joe Perches <joe@...ches.com>,
	Nick Bowler <nbowler@...iptictech.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Sam Ravnborg <sam@...nborg.org>,
	Artem Bityutskiy <Artem.Bityutskiy@...ia.com>
Subject: Re: {PATCH] fix __packed in exported kernel headers

On 06/30/2011 12:13 PM, Mike Frysinger wrote:
>>
>> Not unless the kernel uses its own namespace for these defines.  The
>> thing is, most libraries have their own macro library for this, and
>> collisions are both likely and bad.
> 
> while that's true for exporting compiler.h, namespacing is irrelevant
> to my requirement -- the headers should have sane/usable defaults.
> 

I have no idea what "your requirements" are, but as someone who has
actually implemented a C library on top of the Linux headers I can tell
you it's a very real and relevant issue, and that it is historically one
of the biggest problems.

	-hpa
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