linux-kernel - Re: Process to push changes to include/linux/types.h

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Message-Id: <20101015020134.e552d081.akpm@linux-foundation.org>
Date:	Fri, 15 Oct 2010 02:01:34 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Jan Engelhardt <jengelh@...ozas.de>,
	Eric Paris <eparis@...hat.com>, linux-kernel@...r.kernel.org,
	torvalds@...ux-foundation.org, agruen@...e.de, davem@...emloft.net
Subject: Re: Process to push changes to include/linux/types.h

On Fri, 15 Oct 2010 10:22:49 +0200 Andi Kleen <andi@...stfloor.org> wrote:

> Jan Engelhardt <jengelh@...ozas.de> writes:
> 
> > I would be interested in knowing whether you - in whichever subsystems
> > you happen to be active - would even need aligned_u64. Right now,
> > the only users seem to be PPP and scsi_tgt besides Netfilter.
> 
> Using aligned_u64 is good practice to avoid problems with the 
> 32bit/64bit compat layer. I would recommend it to anyone 
> adding a new user space interface passing a 64bit value.
> 

What "problems" does it prevent when used for this?
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