From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932611AbVHOKPz (ORCPT ); Mon, 15 Aug 2005 06:15:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932629AbVHOKPy (ORCPT ); Mon, 15 Aug 2005 06:15:54 -0400 Received: from caramon.arm.linux.org.uk ([212.18.232.186]:21005 "EHLO caramon.arm.linux.org.uk") by vger.kernel.org with ESMTP id S932611AbVHOKPy (ORCPT ); Mon, 15 Aug 2005 06:15:54 -0400 Date: Mon, 15 Aug 2005 11:15:48 +0100 From: Russell King To: Nick Piggin Cc: blaisorblade@yahoo.it, akpm@osdl.org, jdike@addtoit.com, linux-kernel@vger.kernel.org, user-mode-linux-devel@lists.sourceforge.net, mingo@elte.hu Subject: Re: [patch 18/39] remap_file_pages protection support: add VM_FAULT_SIGSEGV Message-ID: <20050815111548.F19811@flint.arm.linux.org.uk> Mail-Followup-To: Nick Piggin , blaisorblade@yahoo.it, akpm@osdl.org, jdike@addtoit.com, linux-kernel@vger.kernel.org, user-mode-linux-devel@lists.sourceforge.net, mingo@elte.hu References: <20050812182145.DF52E24E7F3@zion.home.lan> <20050815104022.D19811@flint.arm.linux.org.uk> <43006AA6.1040405@yahoo.com.au> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5.1i In-Reply-To: <43006AA6.1040405@yahoo.com.au>; from nickpiggin@yahoo.com.au on Mon, Aug 15, 2005 at 08:12:54PM +1000 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Aug 15, 2005 at 08:12:54PM +1000, Nick Piggin wrote: > Well there is now, and that is we are now using a bit in the 2nd > byte as flags. So I had to do away with -ve numbers there entirely. > > You could achieve a similar thing by using another bit in that byte > #define VM_FAULT_FAILED 0x20 > and make that bit present in VM_FAULT_OOM and VM_FAULT_SIGBUS, then > do an unlikely test for that bit in your handler and branch away to > the slow path. That'll do as well, thanks. -- Russell King Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/ maintainer of: 2.6 Serial core