virtio: make virtio_bus const

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

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ricardo B. Marliere <ricardo@marliere.net>
Message-Id: <20240204-bus_cleanup-virtio-v1-1-3bcb2212aaa0@marliere.net>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Jason Wang <jasowang@redhat.com>

diff --git a/drivers/virtio/virtio.c b/drivers/virtio/virtio.c
index f513ee21b1c182fc90859fdb9d0a9b47fc4e9442..f173587893cb34cadbfb4c6e548c158522c7749d 100644 (file)
--- a/drivers/virtio/virtio.c
+++ b/drivers/virtio/virtio.c
@@ -353,7 +353,7 @@ static void virtio_dev_remove(struct device *_d)
        of_node_put(dev->dev.of_node);
 }
 
-static struct bus_type virtio_bus = {
+static const struct bus_type virtio_bus = {
        .name  = "virtio",
        .match = virtio_dev_match,
        .dev_groups = virtio_dev_groups,