media: platform: allegro-dvt: Constify struct regmap_config

'allegro_regmap_config' and 'allegro_sram_config' are not modified in this
diver and are only used as a const struct regmap_config.

Constifying these structures moves some data to a read-only section, so
increase overall security.

On a x86_64, with allmodconfig:
Before:
   text	   data	    bss	    dec	    hex	filename
  79587	   3706	    116	  83409	  145d1	drivers/media/platform/allegro-dvt/allegro-core.o

After:
   text	   data	    bss	    dec	    hex	filename
  80219	   3066	    116	  83401	  145c9	drivers/media/platform/allegro-dvt/allegro-core.o

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Michael Tretter <m.tretter@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

diff --git a/drivers/media/platform/allegro-dvt/allegro-core.c b/drivers/media/platform/allegro-dvt/allegro-core.c
index da61f9b..1a19fef 100644 (file)
--- a/drivers/media/platform/allegro-dvt/allegro-core.c
+++ b/drivers/media/platform/allegro-dvt/allegro-core.c
@@ -179,7 +179,7 @@ struct allegro_dev {
        struct list_head channels;
 };
 
-static struct regmap_config allegro_regmap_config = {
+static const struct regmap_config allegro_regmap_config = {
        .name = "regmap",
        .reg_bits = 32,
        .val_bits = 32,
@@ -188,7 +188,7 @@ static struct regmap_config allegro_regmap_config = {
        .cache_type = REGCACHE_NONE,
 };
 
-static struct regmap_config allegro_sram_config = {
+static const struct regmap_config allegro_sram_config = {
        .name = "sram",
        .reg_bits = 32,
        .val_bits = 32,