Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751929AbZGKLJr (ORCPT ); Sat, 11 Jul 2009 07:09:47 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751903AbZGKLJk (ORCPT ); Sat, 11 Jul 2009 07:09:40 -0400 Received: from astoria.ccjclearline.com ([64.235.106.9]:48397 "EHLO astoria.ccjclearline.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751730AbZGKLJk (ORCPT ); Sat, 11 Jul 2009 07:09:40 -0400 Date: Sat, 11 Jul 2009 07:07:23 -0400 (EDT) From: "Robert P. J. Day" X-X-Sender: rpjday@localhost To: Linux Kernel Mailing List Subject: Re: what means "module_param(channel_mask, channel_mask, 0644)"? In-Reply-To: Message-ID: References: User-Agent: Alpine 2.00 (LFD 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - astoria.ccjclearline.com X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - crashcourse.ca X-Source: X-Source-Args: X-Source-Dir: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1828 Lines: 43 On Sat, 11 Jul 2009, Robert P. J. Day wrote: > researching my next newbie column about module parameters and i > ran across the following: > > drivers/input/misc/ati_remote2.c:module_param(channel_mask, channel_mask, 0644); > drivers/input/misc/ati_remote2.c:module_param(mode_mask, mode_mask, 0644); > > i have no idea what it means to have the second (type) field of > module_param() simply repeat the name of the parameter. is this > some strange magic? those two names don't *appear* to be typedef'ed > anywhere i can see. i should have added that the reason i ran across this was that i was curious if anyone was using User Defined Parameter Types as explained here: http://docs.blackfin.uclinux.org/doku.php?id=linux-kernel:module_parameters so i did a quick grep for any invocations of module_param() whose type wasn't one of the standard int, boot, short, ... etc ... and those two hits above showed up, which confused me. so ... *is* anyone taking advantage of user-defined module parameter types? not as i can tell, but maybe i just missed it. rday -- ======================================================================== Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Annoying Kernel Pedantry. Web page: http://crashcourse.ca Twitter: http://twitter.com/rpjday "Kernel Newbie Corner" column @ linux.com: http://cli.gs/WG6WYX ======================================================================== -- 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/