netdev - [PATCH] connector: fix defined but not used warning

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Date:   Sat, 7 Jul 2018 08:27:53 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        David Miller <davem@...emloft.net>,
        Evgeniy Polyakov <zbr@...emap.net>
Subject: [PATCH] connector: fix defined but not used warning

From: Randy Dunlap <rdunlap@...radead.org>

Fix a build warning in connector.c when CONFIG_PROC_FS is not enabled
by marking the unused function as __maybe_unused.

../drivers/connector/connector.c:242:12: warning: 'cn_proc_show' defined but not used [-Wunused-function]

Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
Cc: Evgeniy Polyakov <zbr@...emap.net>
Cc: netdev@...r.kernel.org
---
 drivers/connector/connector.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- linux-next-20180706.orig/drivers/connector/connector.c
+++ linux-next-20180706/drivers/connector/connector.c
@@ -19,6 +19,7 @@
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
+#include <linux/compiler.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/list.h>
@@ -239,7 +240,7 @@ void cn_del_callback(struct cb_id *id)
 }
 EXPORT_SYMBOL_GPL(cn_del_callback);
 
-static int cn_proc_show(struct seq_file *m, void *v)
+static int __maybe_unused cn_proc_show(struct seq_file *m, void *v)
 {
 	struct cn_queue_dev *dev = cdev.cbdev;
 	struct cn_callback_entry *cbq;