From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arnd Bergmann Subject: [PATCH] cgroup: add seq_file forward declaration for struct cftype Date: Fri, 29 May 2015 10:52:59 +0200 Message-ID: <8289624.GnpfIU6Era@wuerfel> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: Tejun Heo Cc: cgroups@vger.kernel.org, Li Zefan , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Recent header file changes for cgroup caused lots of warnings about a missing struct seq_file form declaration for every inclusion of include/linux/cgroup-defs.h. As some files are built with -Werror, this leads to build failure like: from /git/arm-soc/drivers/gpu/drm/tilcdc/tilcdc_crtc.c:18: /git/arm-soc/include/linux/cgroup-defs.h:354:25: error: 'struct seq_file' declared inside parameter list [-Werror] cc1: all warnings being treated as errors make[6]: *** [drivers/gpu/drm/tilcdc/tilcdc_crtc.o] Error 1 This patch adds the declaration, which resolves both the warnings and the drm failure. Signed-off-by: Arnd Bergmann Fixes: b4a04ab7a37b ("cgroup: separate out include/linux/cgroup-defs.h") diff --git a/include/linux/cgroup-defs.h b/include/linux/cgroup-defs.h index 7d83d7f73420..ab9dd741ab99 100644 --- a/include/linux/cgroup-defs.h +++ b/include/linux/cgroup-defs.h @@ -302,6 +302,8 @@ struct cgroup_root { char name[MAX_CGROUP_ROOT_NAMELEN]; }; +struct seq_file; + /* * struct cftype: handler definitions for cgroup control files *