From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754655Ab1HEIDu (ORCPT ); Fri, 5 Aug 2011 04:03:50 -0400 Received: from mx1.redhat.com ([209.132.183.28]:14857 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751132Ab1HEIDn (ORCPT ); Fri, 5 Aug 2011 04:03:43 -0400 Message-ID: <4E3BA3B2.7090903@redhat.com> Date: Fri, 05 Aug 2011 16:02:58 +0800 From: Cong Wang User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.18) Gecko/20110621 Fedora/3.1.11-1.fc14 Thunderbird/3.1.11 MIME-Version: 1.0 To: Randy Dunlap CC: Stephen Rothwell , gregkh@suse.de, linux-next@vger.kernel.org, LKML , linux-mm@kvack.org, akpm Subject: Re: [PATCH -next] drivers/base/inode.c: let vmstat_text be optional References: <20110804145834.3b1d92a9eeb8357deb84bf83@canb.auug.org.au> <20110804152211.ea10e3e7.rdunlap@xenotime.net> <4E3B57C3.80203@redhat.com> <4E3B82FD.1040500@xenotime.net> In-Reply-To: <4E3B82FD.1040500@xenotime.net> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 于 2011年08月05日 13:43, Randy Dunlap 写道: > On 08/04/11 19:38, Cong Wang wrote: >> 于 2011年08月05日 06:22, Randy Dunlap 写道: >>> From: Randy Dunlap >>> >>> vmstat_text is only available when PROC_FS or SYSFS is enabled. >>> This causes build errors in drivers/base/node.c when they are >>> both disabled: >>> >>> drivers/built-in.o: In function `node_read_vmstat': >>> node.c:(.text+0x10e28f): undefined reference to `vmstat_text' >>> >>> Rather than litter drivers/base/node.c with #ifdef/#endif around >>> the affected lines of code, add macros for optional sysdev >>> attributes so that those lines of code will be ignored, without >>> using #ifdef/#endif in the .c file(s). I.e., the ifdeffery >>> is done only in a header file with sysdev_create_file_optional() >>> and sysdev_remove_file_optional(). >>> >> >> This looks ugly for me, because other sysfs files here are not optional >> only due to that they don't rely on vmstat_text. >> >> I still think my approach to fix this is better, that is, introducing >> a new Kconfig for drivers/base/node.c which depends on CONFIG_SYSFS. > > Did you post a patch for that? I must have missed it. Yes, see https://lkml.org/lkml/2011/7/19/31. I think I need to resend it. :)