[PATCH v2] hwmon: nct7802: constify attribute_group structures.

[PATCH v2] hwmon: nct7802: constify attribute_group structures.

[Arvind Yadav]

attribute_groups are not supposed to change at runtime. All functions
working with attribute_groups provided by <linux/sysfs.h> work with const
attribute_group. So mark the non-const structs as const.

File size before:
   text	   data	    bss	    dec	    hex	filename
   6161	   9400	      0	  15561	   3cc9	drivers/hwmon/nct7802.o

File size After adding 'const':
   text	   data	    bss	    dec	    hex	filename
   6465	   9080	      0	  15545	   3cb9	drivers/hwmon/nct7802.o

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
---
Changes in v1:
              Subject was not correct. Now comparing size of nct7802.c

 drivers/hwmon/nct7802.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/hwmon/nct7802.c b/drivers/hwmon/nct7802.c
index 12b94b0..2876c18 100644
--- a/drivers/hwmon/nct7802.c
+++ b/drivers/hwmon/nct7802.c
@@ -704,7 +704,7 @@ static umode_t nct7802_temp_is_visible(struct kobject *kobj,
 	return attr->mode;
 }
 
-static struct attribute_group nct7802_temp_group = {
+static const struct attribute_group nct7802_temp_group = {
 	.attrs = nct7802_temp_attrs,
 	.is_visible = nct7802_temp_is_visible,
 };
@@ -802,7 +802,7 @@ static umode_t nct7802_in_is_visible(struct kobject *kobj,
 	return attr->mode;
 }
 
-static struct attribute_group nct7802_in_group = {
+static const struct attribute_group nct7802_in_group = {
 	.attrs = nct7802_in_attrs,
 	.is_visible = nct7802_in_is_visible,
 };
@@ -880,7 +880,7 @@ static umode_t nct7802_fan_is_visible(struct kobject *kobj,
 	return attr->mode;
 }
 
-static struct attribute_group nct7802_fan_group = {
+static const struct attribute_group nct7802_fan_group = {
 	.attrs = nct7802_fan_attrs,
 	.is_visible = nct7802_fan_is_visible,
 };
@@ -898,7 +898,7 @@ static umode_t nct7802_fan_is_visible(struct kobject *kobj,
 	NULL
 };
 
-static struct attribute_group nct7802_pwm_group = {
+static const struct attribute_group nct7802_pwm_group = {
 	.attrs = nct7802_pwm_attrs,
 };
 
@@ -1011,7 +1011,7 @@ static SENSOR_DEVICE_ATTR(pwm3_auto_point4_pwm, S_IRUGO | S_IWUSR,
 	NULL
 };
 
-static struct attribute_group nct7802_auto_point_group = {
+static const struct attribute_group nct7802_auto_point_group = {
 	.attrs = nct7802_auto_point_attrs,
 };
 
-- 
1.9.1

Re: [v2] hwmon: nct7802: constify attribute_group structures.

[Guenter Roeck]

On Wed, Jul 05, 2017 at 10:41:18AM +0530, Arvind Yadav wrote:
> attribute_groups are not supposed to change at runtime. All functions
> working with attribute_groups provided by <linux/sysfs.h> work with const
> attribute_group. So mark the non-const structs as const.
> 
> File size before:
>    text	   data	    bss	    dec	    hex	filename
>    6161	   9400	      0	  15561	   3cc9	drivers/hwmon/nct7802.o
> 
> File size After adding 'const':
>    text	   data	    bss	    dec	    hex	filename
>    6465	   9080	      0	  15545	   3cb9	drivers/hwmon/nct7802.o
> 
> Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>

Ok, I messed up ;-). Took this version.

Thanks,
Guenter

> ---
> Changes in v1:
>               Subject was not correct. Now comparing size of nct7802.c
> 
>  drivers/hwmon/nct7802.c | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/hwmon/nct7802.c b/drivers/hwmon/nct7802.c
> index 12b94b0..2876c18 100644
> --- a/drivers/hwmon/nct7802.c
> +++ b/drivers/hwmon/nct7802.c
> @@ -704,7 +704,7 @@ static umode_t nct7802_temp_is_visible(struct kobject *kobj,
>  	return attr->mode;
>  }
>  
> -static struct attribute_group nct7802_temp_group = {
> +static const struct attribute_group nct7802_temp_group = {
>  	.attrs = nct7802_temp_attrs,
>  	.is_visible = nct7802_temp_is_visible,
>  };
> @@ -802,7 +802,7 @@ static umode_t nct7802_in_is_visible(struct kobject *kobj,
>  	return attr->mode;
>  }
>  
> -static struct attribute_group nct7802_in_group = {
> +static const struct attribute_group nct7802_in_group = {
>  	.attrs = nct7802_in_attrs,
>  	.is_visible = nct7802_in_is_visible,
>  };
> @@ -880,7 +880,7 @@ static umode_t nct7802_fan_is_visible(struct kobject *kobj,
>  	return attr->mode;
>  }
>  
> -static struct attribute_group nct7802_fan_group = {
> +static const struct attribute_group nct7802_fan_group = {
>  	.attrs = nct7802_fan_attrs,
>  	.is_visible = nct7802_fan_is_visible,
>  };
> @@ -898,7 +898,7 @@ static umode_t nct7802_fan_is_visible(struct kobject *kobj,
>  	NULL
>  };
>  
> -static struct attribute_group nct7802_pwm_group = {
> +static const struct attribute_group nct7802_pwm_group = {
>  	.attrs = nct7802_pwm_attrs,
>  };
>  
> @@ -1011,7 +1011,7 @@ static SENSOR_DEVICE_ATTR(pwm3_auto_point4_pwm, S_IRUGO | S_IWUSR,
>  	NULL
>  };
>  
> -static struct attribute_group nct7802_auto_point_group = {
> +static const struct attribute_group nct7802_auto_point_group = {
>  	.attrs = nct7802_auto_point_attrs,
>  };
>