virtio_console: Constify some static variables

The id_table and feature_table pointers in struct virtio_driver are
pointers to const. Mark the corresponding static variables const to
allow the compiler to put them in read-only memory.

Before:
   text    data     bss     dec     hex filename
  25447     713      76   26236    667c drivers/char/virtio_console.o

After:
   text    data     bss     dec     hex filename
  25488     673      76   26237    667d drivers/char/virtio_console.o

Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Amit Shah <amit@kernel.org>
Link: https://lore.kernel.org/r/20200701200950.30314-6-rikard.falkeborn@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c
index 00c5e3a..896f0ba 100644 (file)
--- a/drivers/char/virtio_console.c
+++ b/drivers/char/virtio_console.c
@@ -2112,24 +2112,24 @@ fail:
        return err;
 }
 
-static struct virtio_device_id id_table[] = {
+static const struct virtio_device_id id_table[] = {
        { VIRTIO_ID_CONSOLE, VIRTIO_DEV_ANY_ID },
        { 0 },
 };
 
-static unsigned int features[] = {
+static const unsigned int features[] = {
        VIRTIO_CONSOLE_F_SIZE,
        VIRTIO_CONSOLE_F_MULTIPORT,
 };
 
-static struct virtio_device_id rproc_serial_id_table[] = {
+static const struct virtio_device_id rproc_serial_id_table[] = {
 #if IS_ENABLED(CONFIG_REMOTEPROC)
        { VIRTIO_ID_RPROC_SERIAL, VIRTIO_DEV_ANY_ID },
 #endif
        { 0 },
 };
 
-static unsigned int rproc_serial_features[] = {
+static const unsigned int rproc_serial_features[] = {
 };
 
 #ifdef CONFIG_PM_SLEEP