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

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Message-ID: <BANLkTikKq64RPyT3CS8U+zdc2HmqHYZt4Q@mail.gmail.com>
Date:	Thu, 30 Jun 2011 14:48:11 -0400
From:	Mike Frysinger <vapier@...too.org>
To:	"H. Peter Anvin" <hpa@...or.com>
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 Thu, Jun 30, 2011 at 14:26, H. Peter Anvin wrote:
> On 06/24/2011 10:00 AM, Mike Frysinger wrote:
>>> We generally try to add no such requirements on user applications.
>>
>> the only real solution there is to export the compiler.h headers too
>>
>> plus, many compilers nowadays (like icc/llvm) tend to include support
>> for common gcc attributes ...
>
> Either that OR define a set of macros as being expected by the
> environment of the kernel ABI headers (to be provided by the library.)

without fallback logic (#ifndef xxx...#define xxx...#endif), i think
that's throwing an unreasonable amount of requirements onto userspace
consumers
-mike
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