From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757508AbZLFT3G (ORCPT ); Sun, 6 Dec 2009 14:29:06 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757478AbZLFT3E (ORCPT ); Sun, 6 Dec 2009 14:29:04 -0500 Received: from mailrelay007.isp.belgacom.be ([195.238.6.173]:39065 "EHLO mailrelay007.isp.belgacom.be" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757473AbZLFT3C (ORCPT ); Sun, 6 Dec 2009 14:29:02 -0500 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AgUFACeTG0vCTtAn/2dsb2JhbACBS9NshDME Date: Sun, 6 Dec 2009 20:28:41 +0100 From: Philippe De Muyter To: linux-kernel@vger.kernel.org, linux-m68k@vger.kernel.org Subject: [PATCH m68k resent] allow ioremapping top of memory Message-ID: <20091206192841.GA23088@frolo.macqel> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.16 (2007-06-09) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Geert and all, The test in __ioremap to reject memory ranges crossing the 0 boundary rejects also memory ranges ending at the end of the memory. Fix that. Signed-off-by: Philippe De Muyter diff --git a/arch/m68k/mm/kmap.c b/arch/m68k/mm/kmap.c --- a/arch/m68k/mm/kmap.c +++ b/arch/m68k/mm/kmap.c @@ -116,7 +115,7 @@ void __iomem *__ioremap(unsigned long ph /* * Don't allow mappings that wrap.. */ - if (!size || size > physaddr + size) + if (!size || physaddr > (unsigned long)(-size)) return NULL; #ifdef CONFIG_AMIGA