[S390] cio: Make some structures and a function static.

Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>

drivers/s390/cio/css.c

@@ -191,8 +191,7 @@ static int css_register_subchannel(struct subchannel *sch)
 	return ret;
 }
 
-int
-css_probe_device(struct subchannel_id schid)
+static int css_probe_device(struct subchannel_id schid)
 {
 	int ret;
 	struct subchannel *sch;

drivers/s390/cio/css.h

@@ -138,9 +138,7 @@ struct css_driver {
  * all css_drivers have the css_bus_type
  */
 extern struct bus_type css_bus_type;
-extern struct css_driver io_subchannel_driver;
 
-extern int css_probe_device(struct subchannel_id);
 extern int css_sch_device_register(struct subchannel *);
 extern void css_sch_device_unregister(struct subchannel *);
 extern struct subchannel * get_subchannel_by_schid(struct subchannel_id);

drivers/s390/cio/device.c

@@ -129,7 +129,7 @@ static void io_subchannel_verify(struct device *);
 static void io_subchannel_ioterm(struct device *);
 static void io_subchannel_shutdown(struct subchannel *);
 
-struct css_driver io_subchannel_driver = {
+static struct css_driver io_subchannel_driver = {
 	.subchannel_type = SUBCHANNEL_TYPE_IO,
 	.drv = {
 		.name = "io_subchannel",
@@ -546,7 +546,7 @@ static struct attribute_group ccwdev_attr_group = {
 	.attrs = ccwdev_attrs,
 };
 
-struct attribute_group *ccwdev_attr_groups[] = {
+static struct attribute_group *ccwdev_attr_groups[] = {
 	&ccwdev_attr_group,
 	NULL,
 };