From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jeremy Fitzhardinge <jeremy@goop.org>
Subject: Re: incompatible prototypes
Date: Fri, 27 Apr 2007 09:40:50 -0700
Message-ID: <46322792.3070800@goop.org>
References: <C257E1D0.E0FF%keir@xensource.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Return-path: <xen-devel-bounces@lists.xensource.com>
In-Reply-To: <C257E1D0.E0FF%keir@xensource.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: Keir Fraser <keir@xensource.com>
Cc: PUCCETTI Armand <armand.puccetti@cea.fr>, xen-devel@lists.xensource.com
List-Id: xen-devel@lists.xenproject.org

Keir Fraser wrote:
>> We don't use regparm(3) inside Xen?  Works nicely for the kernel.
>>     
>
> What's the speedup?
>   

Mumble mumble.  Don't know.  It's been that way for quite a long time now.

But it makes the generated code moderately smaller.  -freg-struct-return
helps too (about 2k of text saved on the kernel, which is fairly piddling).

    J