uml: make several things static

Make several things static, because they no longer need to be global.

Acked-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: WANG Cong <wangcong@zeuux.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/um/drivers/net_kern.c b/arch/um/drivers/net_kern.c
index 1d43bdf..5b4ca8d 100644
--- a/arch/um/drivers/net_kern.c
+++ b/arch/um/drivers/net_kern.c
@@ -116,7 +116,7 @@
 	dev_close(lp->dev);
 }
 
-irqreturn_t uml_net_interrupt(int irq, void *dev_id)
+static irqreturn_t uml_net_interrupt(int irq, void *dev_id)
 {
 	struct net_device *dev = dev_id;
 	struct uml_net_private *lp = dev->priv;
@@ -296,7 +296,7 @@
 	.get_link	= ethtool_op_get_link,
 };
 
-void uml_net_user_timer_expire(unsigned long _conn)
+static void uml_net_user_timer_expire(unsigned long _conn)
 {
 #ifdef undef
 	struct connection *conn = (struct connection *)_conn;
@@ -786,7 +786,7 @@
 }
 
 /* uml_net_init shouldn't be called twice on two CPUs at the same time */
-struct notifier_block uml_inetaddr_notifier = {
+static struct notifier_block uml_inetaddr_notifier = {
 	.notifier_call		= uml_inetaddr_event,
 };