From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261350AbVE0BEP (ORCPT ); Thu, 26 May 2005 21:04:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261367AbVE0BEP (ORCPT ); Thu, 26 May 2005 21:04:15 -0400 Received: from smtp005.mail.ukl.yahoo.com ([217.12.11.36]:56204 "HELO smtp005.mail.ukl.yahoo.com") by vger.kernel.org with SMTP id S261350AbVE0BEJ (ORCPT ); Thu, 26 May 2005 21:04:09 -0400 From: Blaisorblade To: akpm@osdl.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org Subject: Re: [patch 4/8] irq code: Add coherence test for PREEMPT_ACTIVE Date: Fri, 27 May 2005 03:06:09 +0200 User-Agent: KMail/1.7.2 Cc: user-mode-linux-devel@lists.sourceforge.net, linuxsh-shmedia-dev@lists.sourceforge.net, linux-sh@m17n.org, dhowells@redhat.com References: <20050527003843.433BA1AEE88@zion.home.lan> In-Reply-To: <20050527003843.433BA1AEE88@zion.home.lan> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-15" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200505270306.09425.blaisorblade@yahoo.it> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Friday 27 May 2005 02:38, blaisorblade@yahoo.it wrote: > After porting this fixlet to UML: > > http://linux.bkbits.net:8080/linux-2.5/cset@41791ab52lfMuF2i3V-eTIGRBbDYKQ > > , I've also added a warning which should refuse compilation with insane > values for PREEMPT_ACTIVE... maybe we should simply move PREEMPT_ACTIVE out > of architectures using GENERIC_IRQS. Ok, a grep shows that possible culprits (i.e. giving success to grep GENERIC_HARDIRQS arch/*/Kconfig, and using 0x4000000 as PREEMPT_ACTIVE, as given by grep PREEMPT_ACTIVE include/asm-*/thread_info.h) are (at a first glance): frv, sh, sh64. After a bit of checking, I also verified if they had overriden the value of HARDIRQ_BITS. Which they haven't (it seems it's defined exactly where CONFIG_HARDIRQS is not used, i.e. nobody is using the ability to override it currently). This was not a very deep investigation, however, so feel free to verify this better. -- Paolo Giarrusso, aka Blaisorblade Skype user "PaoloGiarrusso" Linux registered user n. 292729 http://www.user-mode-linux.org/~blaisorblade ___________________________________ Yahoo! Mail: gratis 1GB per i messaggi e allegati da 10MB http://mail.yahoo.it