From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932068AbWK0S2l (ORCPT ); Mon, 27 Nov 2006 13:28:41 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932681AbWK0S2k (ORCPT ); Mon, 27 Nov 2006 13:28:40 -0500 Received: from nic.NetDirect.CA ([216.16.235.2]:3524 "EHLO rubicon.netdirect.ca") by vger.kernel.org with ESMTP id S932068AbWK0S2j (ORCPT ); Mon, 27 Nov 2006 13:28:39 -0500 X-Originating-Ip: 72.57.81.197 Date: Mon, 27 Nov 2006 13:25:34 -0500 (EST) From: "Robert P. J. Day" X-X-Sender: rpjday@localhost.localdomain To: Linux kernel mailing list Subject: what is the purpose of "CONFIG_DMA_IS_DMA32"? Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Net-Direct-Inc-MailScanner-Information: Please contact the ISP for more information X-Net-Direct-Inc-MailScanner: Found to be clean X-Net-Direct-Inc-MailScanner-SpamCheck: not spam, SpamAssassin (not cached, score=-16.8, required 5, autolearn=not spam, ALL_TRUSTED -1.80, BAYES_00 -15.00) X-Net-Direct-Inc-MailScanner-From: rpjday@mindspring.com Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org perhaps a silly question, but: $ grep -r "DMA_IS_DMA32" * arch/ia64/defconfig:CONFIG_DMA_IS_DMA32=y arch/ia64/configs/sim_defconfig:CONFIG_DMA_IS_DMA32=y arch/ia64/configs/zx1_defconfig:CONFIG_DMA_IS_DMA32=y arch/ia64/configs/tiger_defconfig:CONFIG_DMA_IS_DMA32=y arch/ia64/configs/bigsur_defconfig:CONFIG_DMA_IS_DMA32=y arch/ia64/configs/gensparse_defconfig:CONFIG_DMA_IS_DMA32=y $ what is the purpose of a configuration symbol that is set but never involved in a conditional check? i'm guessing that used to be a config setting in the ia64/Kconfig file that has since vanished. rday