Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932111AbVLCSDt (ORCPT ); Sat, 3 Dec 2005 13:03:49 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932114AbVLCSDt (ORCPT ); Sat, 3 Dec 2005 13:03:49 -0500 Received: from ns2.suse.de ([195.135.220.15]:38607 "EHLO mx2.suse.de") by vger.kernel.org with ESMTP id S932111AbVLCSDs (ORCPT ); Sat, 3 Dec 2005 13:03:48 -0500 To: Steven Rostedt Cc: Vinay Venkataraghavan , linux-kernel@vger.kernel.org Subject: Re: copy_from_user/copy_to_user question References: <20051202224025.39396.qmail@web32108.mail.mud.yahoo.com> <1133572199.32583.93.camel@localhost.localdomain> <20051203013833.GG27946@ftp.linux.org.uk> <1133575346.4894.7.camel@localhost.localdomain> From: Andi Kleen Date: 03 Dec 2005 15:33:02 -0700 In-Reply-To: <1133575346.4894.7.camel@localhost.localdomain> Message-ID: User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.3 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 641 Lines: 12 Steven Rostedt writes: > > I haven't dealt (yet) with the copy_user of x86_64. Is there a problem > when one tries to copy to/from a 32 bit address while in a 64 bit > address space? No problem, except on UML/x86-64 which has fully separate address spaces. Architectures where it doesn't work include s390,m68k,pa-risc,sparc64, i386 with 4/4 patches among others. -Andi - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/