drbd: Improve some function and variable naming

Rename functions
conn_destroy() -> drbd_destroy_connection(),
drbd_minor_destroy() -> drbd_destroy_device()
drbd_adm_add_minor() -> drbd_adm_add_minor()
drbd_adm_delete_minor() -> drbd_adm_del_minor()

Rename global variable minors to drbd_devices

Signed-off-by: Andreas Gruenbacher <agruen@linbit.com>
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c
index e08e99f..791005e 100644
--- a/drivers/block/drbd/drbd_receiver.c
+++ b/drivers/block/drbd/drbd_receiver.c
@@ -1058,7 +1058,7 @@
 			clear_bit(DISCARD_MY_DATA, &device->flags);
 
 		drbd_connected(device);
-		kref_put(&device->kref, &drbd_minor_destroy);
+		kref_put(&device->kref, drbd_destroy_device);
 		rcu_read_lock();
 	}
 	rcu_read_unlock();
@@ -1166,7 +1166,7 @@
 				drbd_bump_write_ordering(connection, WO_drain_io);
 			}
 			put_ldev(device);
-			kref_put(&device->kref, &drbd_minor_destroy);
+			kref_put(&device->kref, drbd_destroy_device);
 
 			rcu_read_lock();
 			if (rv)
@@ -1409,7 +1409,7 @@
 		kref_get(&device->kref);
 		rcu_read_unlock();
 		drbd_wait_ee_list_empty(device, &device->active_ee);
-		kref_put(&device->kref, &drbd_minor_destroy);
+		kref_put(&device->kref, drbd_destroy_device);
 		rcu_read_lock();
 	}
 	rcu_read_unlock();
@@ -4459,7 +4459,7 @@
 		kref_get(&device->kref);
 		rcu_read_unlock();
 		drbd_disconnected(device);
-		kref_put(&device->kref, &drbd_minor_destroy);
+		kref_put(&device->kref, &drbd_destroy_device);
 		rcu_read_lock();
 	}
 	rcu_read_unlock();
@@ -5199,10 +5199,10 @@
 			kref_get(&device->kref);
 			rcu_read_unlock();
 			if (drbd_finish_peer_reqs(device)) {
-				kref_put(&device->kref, &drbd_minor_destroy);
+				kref_put(&device->kref, drbd_destroy_device);
 				return 1;
 			}
-			kref_put(&device->kref, &drbd_minor_destroy);
+			kref_put(&device->kref, drbd_destroy_device);
 			rcu_read_lock();
 		}
 		set_bit(SIGNAL_ASENDER, &connection->flags);