'struct regulator_desc' is not modified in this driver.

Constifying this structure moves some data to a read-only section, so
increase overall security, especially when the structure holds some
function pointers.

On a x86_64, with allmodconfig:
Before:
======
   text	   data	    bss	    dec	    hex	filename
   3251	   6928	     16	  10195	   27d3	drivers/regulator/88pm886-regulator.o

After:
=====
   text	   data	    bss	    dec	    hex	filename
   9795	    360	     16	  10171	   27bb	drivers/regulator/88pm886-regulator.o

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
--
Compile tested only
---
 drivers/regulator/88pm886-regulator.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/regulator/88pm886-regulator.c b/drivers/regulator/88pm886-regulator.c
index a38bd4f312b7..68c83a4ebda8 100644
--- a/drivers/regulator/88pm886-regulator.c
+++ b/drivers/regulator/88pm886-regulator.c
@@ -56,7 +56,7 @@ static const struct linear_range pm886_buck_volt_ranges2[] = {
 	REGULATOR_LINEAR_RANGE(1600000, 80, 114, 50000),
 };
 
-static struct regulator_desc pm886_regulators[] = {
+static const struct regulator_desc pm886_regulators[] = {
 	{
 		.name = "LDO1",
 		.regulators_node = "regulators",
@@ -340,9 +340,9 @@ static struct regulator_desc pm886_regulators[] = {
 static int pm886_regulator_probe(struct platform_device *pdev)
 {
 	struct pm886_chip *chip = dev_get_drvdata(pdev->dev.parent);
+	const struct regulator_desc *rdesc;
 	struct regulator_config rcfg = { };
 	struct device *dev = &pdev->dev;
-	struct regulator_desc *rdesc;
 	struct regulator_dev *rdev;
 	struct i2c_client *page;
 	struct regmap *regmap;
-- 
2.46.0

Christophe JAILLET, 2024-09-08T10:25:56+02:00:
> 'struct regulator_desc' is not modified in this driver.
>
> Constifying this structure moves some data to a read-only section, so
> increase overall security, especially when the structure holds some

"increases"?

> function pointers.
>
> On a x86_64, with allmodconfig:
> Before:
> ======
>    text	   data	    bss	    dec	    hex	filename
>    3251	   6928	     16	  10195	   27d3	drivers/regulator/88pm886-regulator.o
>
> After:
> =====
>    text	   data	    bss	    dec	    hex	filename
>    9795	    360	     16	  10171	   27bb	drivers/regulator/88pm886-regulator.o
>
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
> --
> Compile tested only
> ---
>  drivers/regulator/88pm886-regulator.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/regulator/88pm886-regulator.c b/drivers/regulator/88pm886-regulator.c
> index a38bd4f312b7..68c83a4ebda8 100644
> --- a/drivers/regulator/88pm886-regulator.c
> +++ b/drivers/regulator/88pm886-regulator.c
> @@ -56,7 +56,7 @@ static const struct linear_range pm886_buck_volt_ranges2[] = {
>  	REGULATOR_LINEAR_RANGE(1600000, 80, 114, 50000),
>  };
>  
> -static struct regulator_desc pm886_regulators[] = {
> +static const struct regulator_desc pm886_regulators[] = {
>  	{
>  		.name = "LDO1",
>  		.regulators_node = "regulators",
> @@ -340,9 +340,9 @@ static struct regulator_desc pm886_regulators[] = {
>  static int pm886_regulator_probe(struct platform_device *pdev)
>  {
>  	struct pm886_chip *chip = dev_get_drvdata(pdev->dev.parent);
> +	const struct regulator_desc *rdesc;
>  	struct regulator_config rcfg = { };
>  	struct device *dev = &pdev->dev;
> -	struct regulator_desc *rdesc;
>  	struct regulator_dev *rdev;
>  	struct i2c_client *page;
>  	struct regmap *regmap;
> -- 
> 2.46.0

Reviewed-by: Karel Balej <balejk@matfyz.cz>

Thanks,
K. B.