linux-kernel - [PATCH 3/3] pinctrl: ti: ti-iodelay: Constify struct regmap

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Message-ID: <4eefa8530a55ecde82b3ec9a445f93c01bda7ded.1720556038.git.christophe.jaillet@wanadoo.fr>
Date: Tue,  9 Jul 2024 22:37:45 +0200
From: Christophe JAILLET <christophe.jaillet@...adoo.fr>
To: linus.walleij@...aro.org,
	lokeshvutla@...com,
	nm@...com,
	robh@...nel.org,
	tony@...mide.com
Cc: linux-gpio@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org,
	Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH 3/3] pinctrl: ti: ti-iodelay: Constify struct regmap_config

'struct regmap_config' is not modified in this driver.

Constifying this structure 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
  17355	   1692	     16	  19063	   4a77	drivers/pinctrl/ti/pinctrl-ti-iodelay.o

After:
=====
   text	   data	    bss	    dec	    hex	filename
  17729	   1372	     16	  19117	   4aad	drivers/pinctrl/ti/pinctrl-ti-iodelay.o

Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
Compile tested-only.
---
 drivers/pinctrl/ti/pinctrl-ti-iodelay.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/pinctrl/ti/pinctrl-ti-iodelay.c b/drivers/pinctrl/ti/pinctrl-ti-iodelay.c
index 65f9439d0d5b..019b302db2b0 100644
--- a/drivers/pinctrl/ti/pinctrl-ti-iodelay.c
+++ b/drivers/pinctrl/ti/pinctrl-ti-iodelay.c
@@ -82,7 +82,7 @@ struct ti_iodelay_reg_data {
 	u32 reg_start_offset;
 	u32 reg_nr_per_pin;
 
-	struct regmap_config *regmap_config;
+	const struct regmap_config *regmap_config;
 };
 
 /**
@@ -776,7 +776,7 @@ static int ti_iodelay_alloc_pins(struct device *dev,
 	return 0;
 }
 
-static struct regmap_config dra7_iodelay_regmap_config = {
+static const struct regmap_config dra7_iodelay_regmap_config = {
 	.reg_bits = 32,
 	.reg_stride = 4,
 	.val_bits = 32,
-- 
2.45.2