WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

[Xen-devel] Re: Section conflicts with percpu variables

To: Tejun Heo <tj@xxxxxxxxxx>
Subject: [Xen-devel] Re: Section conflicts with percpu variables
From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Date: Fri, 29 Oct 2010 07:16:02 -0700
Cc: "Xen-devel@xxxxxxxxxxxxxxxxxxx" <Xen-devel@xxxxxxxxxxxxxxxxxxx>, Teck Choon Giam <giamteckchoon@xxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>
Delivery-date: Fri, 29 Oct 2010 07:16:53 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <4CC9409D.7050405@xxxxxxxxxx>
List-help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
List-post: <mailto:xen-devel@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
References: <4CC8780C.8090401@xxxxxxxx> <4CC9409D.7050405@xxxxxxxxxx>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.9) Gecko/20100921 Fedora/3.1.4-1.fc13 Lightning/1.0b3pre Thunderbird/3.1.4
 On 10/28/2010 02:21 AM, Tejun Heo wrote:
> On 10/27/2010 09:05 PM, Jeremy Fitzhardinge wrote:
>>  Hi Tejun,
>>
>> I wonder if you could have a look at this.  I have someone reporting
>> compilation failures when using the stock Centos 5 compiler:
>>
>> arch/x86/xen/mmu.c:163: error: __pcpu_scope_xen_cr3 causes a section type 
>> conflict
>> arch/x86/xen/mmu.c:164: error: __pcpu_scope_xen_current_cr3 causes a section 
>> type conflict
>> arch/x86/xen/mmu.c:163: error: __pcpu_unique_xen_cr3 causes a section type 
>> conflict
>> arch/x86/xen/mmu.c:164: error: __pcpu_unique_xen_current_cr3 causes a 
>> section type conflict
>>
>> Looking at mmu.i, I can't see why it is picking on these particular
>> per-cpu variables.  Do you have any insight into this.
> Hmmm... me neither.  section type conflict?  Does it make any
> different if you move the definitions near the top of the file or use
> a different compiler version?

This is the first report of this kind I've seen, so it mostly works. 
The compiler in question is the stock Centos 5 (.1?) compiler, so it
would be nice to make sure it works as-is.

I've seen section type conflicts with .discard before when discarding a
function and a data type with the same section, which is why I added
general support for .discard.* so they can all get their own sections. 
But that doesn't seem to be the case here.

    J

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel

<Prev in Thread] Current Thread [Next in Thread>
  • [Xen-devel] Re: Section conflicts with percpu variables, Jeremy Fitzhardinge <=