From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754707AbYAGDt5 (ORCPT ); Sun, 6 Jan 2008 22:49:57 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753218AbYAGDts (ORCPT ); Sun, 6 Jan 2008 22:49:48 -0500 Received: from smtp115.sbc.mail.sp1.yahoo.com ([69.147.64.88]:32505 "HELO smtp115.sbc.mail.sp1.yahoo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1753187AbYAGDtr (ORCPT ); Sun, 6 Jan 2008 22:49:47 -0500 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=pacbell.net; h=Received:X-YMail-OSG:From:To:Subject:Date:User-Agent:Cc:References:In-Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding:Content-Disposition:Message-Id; b=5WxvX9I6DmG4FRd+rtRqPJwS9Txojy1xhoDBfSenJfujzuef82Q4btbl5EupR6UJxScGKkTSdspXAlKG/rPM5UQgIADxT4cHZfB5LMI/sdg7GSbEQFairniwJT+bfcYyK1Y1uIl9mWtrq0vjx3V6CxMO4CCvhYP3cnXan12tva0= ; X-YMail-OSG: 74ZlBhMVM1lNtUKvJJ.Uvd1Vj738G7jnUuZYj7.Oix68duJBoKj8C5A3hd4QFLS0oTurP.Votw-- From: David Brownell To: yi.y.yang@intel.com Subject: Re: [linux-pm][PATCH] base: Change power/wakeup output from "" to "unsupported" if wakeup feature isn't supported by a device Date: Sun, 6 Jan 2008 19:49:43 -0800 User-Agent: KMail/1.9.6 Cc: Olivier Galibert , Alan Stern , pavel@ucw.cz, linux-pm@lists.linux-foundation.org, linux-kernel@vger.kernel.org References: <20080104160933.B01D81FBAB5@adsl-69-226-248-13.dsl.pltn13.pacbell.net> <20080104165214.GA30672@dspnet.fr.eu.org> <1199670923.3551.10.camel@yangyi-dev.bj.intel.com> In-Reply-To: <1199670923.3551.10.camel@yangyi-dev.bj.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200801061949.44408.david-b@pacbell.net> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sunday 06 January 2008, Yi Yang wrote: > > > How about not changing a userland-visible interface gratuitously? > > "empty" can't tell a user the state of wakeup of a device, so it is > necessary to change it. Words don't say anything at all in isolation. For example, here the current tristate behavior has been documented for several years now ... and that's the only thing that could have conveyed any meaning whatever. I can't agree that it's even slightly "necessary" to make such a grutuitous and backwards-incompatible change.