From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965123AbWEYL7M (ORCPT ); Thu, 25 May 2006 07:59:12 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S965124AbWEYL7M (ORCPT ); Thu, 25 May 2006 07:59:12 -0400 Received: from mx1.redhat.com ([66.187.233.31]:20373 "EHLO mx1.redhat.com") by vger.kernel.org with ESMTP id S965123AbWEYL7K (ORCPT ); Thu, 25 May 2006 07:59:10 -0400 From: David Howells In-Reply-To: <1060522044652.31268@suse.de> References: <1060522044652.31268@suse.de> <20060522143524.25410.patches@notabene> To: NeilBrown Cc: Andrew Morton , linux-kernel@vger.kernel.org Subject: Re: [PATCH 001 of 2] Prepare for __copy_from_user_inatomic to not zero missed bytes. X-Mailer: MH-E 7.92+cvs; nmh 1.1; GNU Emacs 22.0.50.4 Date: Thu, 25 May 2006 12:59:03 +0100 Message-ID: <19591.1148558343@warthog.cambridge.redhat.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org NeilBrown wrote: > Interestingly 'frv' disables preempt in kmap_atomic, but its > copy_from_user doesn't expect faults and never zeros the tail... What gives you the idea that copy_from_user() on FRV doesn't expect or handle faults when CONFIG_MMU is set? And why do you say it never zeroes the tail? David