Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751650AbaKJFU3 (ORCPT ); Mon, 10 Nov 2014 00:20:29 -0500 Received: from shards.monkeyblade.net ([149.20.54.216]:37323 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751522AbaKJFUX (ORCPT ); Mon, 10 Nov 2014 00:20:23 -0500 Date: Mon, 10 Nov 2014 00:20:20 -0500 (EST) Message-Id: <20141110.002020.1062493586889118565.davem@davemloft.net> To: viro@ZenIV.linux.org.uk Cc: herbert@gondor.apana.org.au, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, bcrl@kvack.org, mst@redhat.com Subject: Re: [PATCH 1/4] inet: Add skb_copy_datagram_iter From: David Miller In-Reply-To: <20141109211908.GF7996@ZenIV.linux.org.uk> References: <20141107221114.GB7996@ZenIV.linux.org.uk> <20141107234253.GE7996@ZenIV.linux.org.uk> <20141109211908.GF7996@ZenIV.linux.org.uk> X-Mailer: Mew version 6.6 on Emacs 24.3 / Mule 6.0 (HANACHIRUSATO) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.7 (shards.monkeyblade.net [149.20.54.216]); Sun, 09 Nov 2014 21:20:22 -0800 (PST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Al Viro Date: Sun, 9 Nov 2014 21:19:08 +0000 > 1) does sparc64 access_ok() need to differ for 32bit and 64bit tasks? sparc64 will just fault no matter what kind of task it is. It is impossible for a user task to generate a reference to a kernel virtual address, as kernel and user accesses each go via a separate address space identifier. -- 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/