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/slip_kern.c b/arch/um/drivers/slip_kern.c
index 6b4a0f9..d19faec 100644
--- a/arch/um/drivers/slip_kern.c
+++ b/arch/um/drivers/slip_kern.c
@@ -13,7 +13,7 @@
 	char *gate_addr;
 };
 
-void slip_init(struct net_device *dev, void *data)
+static void slip_init(struct net_device *dev, void *data)
 {
 	struct uml_net_private *private;
 	struct slip_data *spri;
@@ -57,7 +57,7 @@
 			       (struct slip_data *) &lp->user);
 }
 
-const struct net_kern_info slip_kern_info = {
+static const struct net_kern_info slip_kern_info = {
 	.init			= slip_init,
 	.protocol		= slip_protocol,
 	.read			= slip_read,