From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760314AbYJMXiO (ORCPT ); Mon, 13 Oct 2008 19:38:14 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756667AbYJMXh6 (ORCPT ); Mon, 13 Oct 2008 19:37:58 -0400 Received: from tomts5.bellnexxia.net ([209.226.175.25]:43561 "EHLO tomts5-srv.bellnexxia.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755597AbYJMXh5 (ORCPT ); Mon, 13 Oct 2008 19:37:57 -0400 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: Ah4FAER480hMQWq+/2dsb2JhbACBcrs8gWw Date: Mon, 13 Oct 2008 19:37:53 -0400 From: Mathieu Desnoyers To: David Miller Cc: linux-kernel@vger.kernel.org Subject: Re: sparc64: Optimized immediate value implementation build error Message-ID: <20081013233752.GA7866@Krystal> References: <20081003201007.GA16025@Krystal> <20081013.011525.31258522.davem@davemloft.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Content-Disposition: inline In-Reply-To: <20081013.011525.31258522.davem@davemloft.net> X-Editor: vi X-Info: http://krystal.dyndns.org:8080 X-Operating-System: Linux/2.6.21.3-grsec (i686) X-Uptime: 19:34:57 up 131 days, 4:15, 10 users, load average: 1.24, 0.96, 0.80 User-Agent: Mutt/1.5.16 (2007-06-11) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * David Miller (davem@davemloft.net) wrote: > From: Mathieu Desnoyers > Date: Fri, 3 Oct 2008 16:10:07 -0400 > > > I ran a cross-compiler on the -lttng tree > > git://git.kernel.org/pub/scm/linux/kernel/git/compudj/linux-2.6-lttng.git > > > > to build the sparc64 arch, and ran across this build error : > > > > /home/compudj/git/morestable/linux-2.6-lttng/include/trace/sched.h: In function `do_fork': > > /home/compudj/git/morestable/linux-2.6-lttng/include/trace/sched.h:38: warning: asm operand 1 probably doesn't match constraints > > /home/compudj/git/morestable/linux-2.6-lttng/include/trace/sched.h:38: error: impossible constraint in `asm' > > /home/compudj/git/morestable/linux-2.6-lttng/include/trace/sched.h:38: warning: 'value' might be used uninitialized in this function > > make[2]: *** [kernel/fork.o] Error 1 > > > > I think it's caused by : > > http://git.kernel.org/?p=linux/kernel/git/compudj/linux-2.6-lttng.git;a=commit;h=c76bfa90a6eb02651368a152b3646aa672d9e625 > > It can't be "caused by" that commit because that's the initial > immediate value sparc64 support I wrote and the tree very much compiled > properly when I did test builds way back then. > > I don't have time to look further into this right now, sorry. Ok, I'll dig into this. I use gcc 3.4.5, that could be my problem; it's broken on x86_64. I'll do some testing in this direction. Also, I see that you have used .uaword and declared "int" in your sparc64 implementation to encode pointers. Am I missing something or should it be "long" and either .word or .xword (32 or 64 bits) ? Mathieu -- Mathieu Desnoyers OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68