From mboxrd@z Thu Jan  1 00:00:00 1970
From: David <xendev@bsdlazarus.com>
Subject: Re: 32/64-bit hypercall interface
Date: Fri, 30 Sep 2005 12:44:27 -0400
Message-ID: <433D6B6B.3030906@bsdlazarus.com>
References: <A95E2296287EAD4EB592B5DEEFCE0E9D32E068@liverpoolst.ad.cl.cam.ac.uk>	<200509291317.25090.hollisb@us.ibm.com>	<200509291512.29891.hollisb@us.ibm.com>	<31c4b41b23a195dd2d69cdea28754843@cl.cam.ac.uk>	<20050930005405.GG5242@andreilx.eng.hq.xensource.com>	<bac2506160e28cc7fecb9afa4fddfb10@cl.cam.ac.uk>	<24aa8891a52e3d3a34fc3b59179a8d0f@us.ibm.com>	<99da46303de5c070b985b66e5c1c96dd@cl.cam.ac.uk>
	<4f11a9f98b8a256a1a9011af12e9788e@us.ibm.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Return-path: <xen-devel-bounces@lists.xensource.com>
In-Reply-To: <4f11a9f98b8a256a1a9011af12e9788e@us.ibm.com>
List-Unsubscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xensource.com>
List-Help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-Subscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
Sender: xen-devel-bounces@lists.xensource.com
Errors-To: xen-devel-bounces@lists.xensource.com
To: Hollis Blanchard <hollisb@us.ibm.com>, xen-devel@lists.xensource.com
List-Id: xen-devel@lists.xenproject.org


Hi,

>
> I think the Linux kernel folks learned the "unsigned long" lesson too 
> late, and now there is quite a lot of fixup code to convert 32-bit 
> userspace structs to 64-bit kernel structs (have a look at 
> linux/fs/compat_ioctl.c and compat.c). It seems a shame to repeat the 
> same mistakes in Xen...
>
Quick question....  What is this "'unsigned long' lesson" you are 
refering to?

-- David