linux-kernel - Re: [PATCH] autofs4: fix 32-bit userspace vs 64-bit kernel communications

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Message-Id: <1213239148.4994.70.camel@raven.themaw.net>
Date:	Thu, 12 Jun 2008 10:52:28 +0800
From:	Ian Kent <raven@...maw.net>
To:	Mikael Pettersson <mikpe@...uu.se>
Cc:	Pavel Emelyanov <xemul@...nvz.org>,
	autofs mailing list <autofs@...ux.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Konstantin Khlebnikov <khlebnikov@...nvz.org>
Subject: Re: [PATCH] autofs4: fix 32-bit userspace vs 64-bit
	kernel	communications


On Wed, 2008-06-11 at 16:29 +0200, Mikael Pettersson wrote:
> Ian Kent writes:
>  > What about other arches offer 32-bit within a 64-bit environment (has
>  > this been the case on sparc64 at some point)?
>  > What about the compiler padding on these?
> 
> Both ppc64 and sparc64 commonly have 32-bit userspaces.
> But 64-bit and mixed 32/64-bit userspaces are of course possible.

I believe that both these archs have the same alignment characteristics
a x86_64. Can anyone confirm that?

Ian


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