From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756631AbYJNCbv (ORCPT ); Mon, 13 Oct 2008 22:31:51 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754779AbYJNCbm (ORCPT ); Mon, 13 Oct 2008 22:31:42 -0400 Received: from 74-93-104-97-Washington.hfc.comcastbusiness.net ([74.93.104.97]:50624 "EHLO sunset.davemloft.net" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1754763AbYJNCbl (ORCPT ); Mon, 13 Oct 2008 22:31:41 -0400 Date: Mon, 13 Oct 2008 19:31:17 -0700 (PDT) Message-Id: <20081013.193117.38855645.davem@davemloft.net> To: mathieu.desnoyers@polymtl.ca Cc: linux-kernel@vger.kernel.org Subject: Re: sparc64: Optimized immediate value implementation build error From: David Miller In-Reply-To: <20081014021704.GA15549@Krystal> References: <20081013233752.GA7866@Krystal> <20081013.183134.193695176.davem@davemloft.net> <20081014021704.GA15549@Krystal> X-Mailer: Mew version 6.1 on Emacs 22.1 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Mathieu Desnoyers Date: Mon, 13 Oct 2008 22:17:04 -0400 > * David Miller (davem@davemloft.net) wrote: > > From: Mathieu Desnoyers > > Date: Mon, 13 Oct 2008 19:37:53 -0400 > > > > > * 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) ? > > > > long would be for ".uaxword", ".uaword" is 32-bit. It means > > "UnAligned WORD" > > > > Ok, it's fixed. How? :-) > If someone has access to a sparc64 gcc >= 4.0.0 compiler (native or > cross) and some spare cycles, if would be interesting to build test this > with CONFIG_IMMEDIATE=y and with CONFIG_TRACEPOINTS=y and > CONFIG_MARKERS=y : > > git://git.kernel.org/pub/scm/linux/kernel/git/compudj/linux-2.6-lttng.git > branch : 2.6.27-lttng-0.40 I just checked out 0.39 and was building it to try and reproduce your failure. I'll pull in 0.40 next.