Input: gameport - make gameport_bus const

Now that the driver core can properly handle constant struct bus_type,
move the gameport_bus variable to be a constant structure as well,
placing it into read-only memory which can not be modified at runtime.

Suggested-by: Greg Kroah-Hartman <[e-mail]>
Signed-off-by: "Ricardo B. Marliere" <[e-mail]>
Reviewed-by: Greg Kroah-Hartman <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Dmitry Torokhov <[e-mail]>

drivers/input/gameport/gameport.c

···
 
 static LIST_HEAD(gameport_list);
 
-static struct bus_type gameport_bus;
+static const struct bus_type gameport_bus;
 
 static void gameport_add_port(struct gameport *gameport);
 static void gameport_attach_driver(struct gameport_driver *drv);
···
 	return !gameport_drv->ignore;
 }
 
-static struct bus_type gameport_bus = {
+static const struct bus_type gameport_bus = {
 	.name		= "gameport",
 	.dev_groups	= gameport_device_groups,
 	.drv_groups	= gameport_driver_groups,