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Message-ID: <Zjs_Jcin0QJ54luy@pengutronix.de>
Date: Wed, 8 May 2024 11:00:21 +0200
From: Michael Tretter <m.tretter@...gutronix.de>
To: Christophe JAILLET <christophe.jaillet@...adoo.fr>
Cc: Pengutronix Kernel Team <kernel@...gutronix.de>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
linux-media@...r.kernel.org
Subject: Re: [PATCH] media: platform: allegro-dvt: Constify struct
regmap_config
On Sun, 05 May 2024 09:28:25 +0200, Christophe JAILLET wrote:
> '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@...adoo.fr>
Reviewed-by: Michael Tretter <m.tretter@...gutronix.de>
> ---
> drivers/media/platform/allegro-dvt/allegro-core.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/media/platform/allegro-dvt/allegro-core.c b/drivers/media/platform/allegro-dvt/allegro-core.c
> index da61f9beb6b4..1a19fef62e81 100644
> --- 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,
> --
> 2.45.0
>
>
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