virtio: make virtio_bus const

rbmarliere · mstsirkin · commit 2b666ee29618 · 2024-03-19T02:45:50.000-04:00
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 &lt;gregkh@linuxfoundation.org&gt;
Suggested-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
Signed-off-by: Ricardo B. Marliere &lt;ricardo@marliere.net&gt;
Message-Id: &lt;20240204-bus_cleanup-virtio-v1-1-3bcb2212aaa0@marliere.net&gt;
Signed-off-by: Michael S. Tsirkin &lt;mst@redhat.com&gt;
Reviewed-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
Acked-by: Jason Wang &lt;jasowang@redhat.com&gt;
diff --git 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,

Original file line number	Diff line number	Diff line change
`@@ -353,7 +353,7 @@ static void virtio_dev_remove(struct device *_d)`
`353`	`353`	`of_node_put(dev->dev.of_node);`
`354`	`354`	`}`
`355`	`355`
`356`		`-static struct bus_type virtio_bus = {`
	`356`	`+static const struct bus_type virtio_bus = {`
`357`	`357`	`.name = "virtio",`
`358`	`358`	`.match = virtio_dev_match,`
`359`	`359`	`.dev_groups = virtio_dev_groups,`