linux-kernel - Re: [PATCH] Force same size of struct autofs_v5_packet on x86 and x86

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Message-ID: <20110916101903.GI2203@ZenIV.linux.org.uk>
Date:	Fri, 16 Sep 2011 11:19:03 +0100
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Thomas Meyer <thomas@...3r.de>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	dhowells@...hat.com, raven@...maw.net
Subject: Re: [PATCH] Force same size of struct autofs_v5_packet on x86 and
 x86_64

On Fri, Sep 16, 2011 at 12:06:38PM +0200, Thomas Meyer wrote:
> autofs_v5_packet is 300 bytes on x86 and 304 bytes on x86_64.
> This difference is wrong and leads to a hang in systemd when running
> a x86 userspace on an x86_64 kernel.

NAK.

You are talking about the userland ABI.  With existing users.  Changing
it might help systemd (what the hell is it doing with autofs, anyway?),
but breaking existing binaries (you know, ones that *do* have some business
dealing with autofs) is not acceptable.
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