bsg: minor bug fixes

This fixes the following minor issues:

- add EXPORT_SYMBOL_GPL for bsg_register_queue and
bsg_unregister_queue.

- shut up gcc warnings
Signed-off-by: NFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: NJens Axboe <axboe@nelson.home.kernel.dk>

block/bsg.c

@@ -961,8 +961,9 @@ void bsg_unregister_queue(struct request_queue *q)
 	bsg_device_nr--;
 	mutex_unlock(&bsg_mutex);
 }
+EXPORT_SYMBOL_GPL(bsg_unregister_queue);
 
-int bsg_register_queue(struct request_queue *q, char *name)
+int bsg_register_queue(struct request_queue *q, const char *name)
 {
 	struct bsg_class_device *bcd, *__bcd;
 	dev_t dev;
@@ -1025,6 +1026,7 @@ int bsg_register_queue(struct request_queue *q, char *name)
 	mutex_unlock(&bsg_mutex);
 	return ret;
 }
+EXPORT_SYMBOL_GPL(bsg_register_queue);
 
 static int bsg_add(struct class_device *cl_dev, struct class_interface *cl_intf)
 {

include/linux/bsg.h

@@ -51,7 +51,7 @@ struct bsg_class_device {
 	struct request_queue *queue;
 };
 
-extern int bsg_register_queue(struct request_queue *, char *);
+extern int bsg_register_queue(struct request_queue *, const char *);
 extern void bsg_unregister_queue(struct request_queue *);
 #else
 struct bsg_class_device { };