From mboxrd@z Thu Jan 1 00:00:00 1970 From: Cong Wang Subject: Re: [PATCH -next] drivers/base/inode.c: let vmstat_text be optional Date: Fri, 05 Aug 2011 10:38:59 +0800 Message-ID: <4E3B57C3.80203@redhat.com> References: <20110804145834.3b1d92a9eeb8357deb84bf83@canb.auug.org.au> <20110804152211.ea10e3e7.rdunlap@xenotime.net> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <20110804152211.ea10e3e7.rdunlap@xenotime.net> Sender: owner-linux-mm@kvack.org To: Randy Dunlap Cc: Stephen Rothwell , gregkh@suse.de, linux-next@vger.kernel.org, LKML , linux-mm@kvack.org, akpm List-Id: linux-next.vger.kernel.org =E4=BA=8E 2011=E5=B9=B408=E6=9C=8805=E6=97=A5 06:22, Randy Dunlap =E5=86=99= =E9=81=93: > 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. Thanks. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter= .ca/ Don't email: email@kvack.org