2017-07-05 05:22:32

by Arvind Yadav

Subject: [PATCH] hwmon: adc128d818: constify attribute_group structures.

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
2304 2936 0 5240 1478 drivers/hwmon/adc128d818.o

File size After adding 'const':
text data bss dec hex filename
2344 2872 0 5216 1460 drivers/hwmon/adc128d818.o

Signed-off-by: Arvind Yadav <[email protected]>
---
drivers/hwmon/adc128d818.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hwmon/adc128d818.c b/drivers/hwmon/adc128d818.c
index a557b46..bd2ca31 100644
--- a/drivers/hwmon/adc128d818.c
+++ b/drivers/hwmon/adc128d818.c
@@ -384,7 +384,7 @@ static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO,
NULL
};

-static struct attribute_group adc128_group = {
+static const struct attribute_group adc128_group = {
.attrs = adc128_attrs,
.is_visible = adc128_is_visible,
};
--
1.9.1

2017-07-08 15:56:41

by Guenter Roeck

Subject: Re: hwmon: adc128d818: constify attribute_group structures.

On Wed, Jul 05, 2017 at 10:52:13AM +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
> 2304 2936 0 5240 1478 drivers/hwmon/adc128d818.o
>
> File size After adding 'const':
> text data bss dec hex filename
> 2344 2872 0 5216 1460 drivers/hwmon/adc128d818.o
>
> Signed-off-by: Arvind Yadav <[email protected]>

Applied to hwmon-next.

Thanks,
Guenter

> ---
> drivers/hwmon/adc128d818.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/hwmon/adc128d818.c b/drivers/hwmon/adc128d818.c
> index a557b46..bd2ca31 100644
> --- a/drivers/hwmon/adc128d818.c
> +++ b/drivers/hwmon/adc128d818.c
> @@ -384,7 +384,7 @@ static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO,
> NULL
> };
>
> -static struct attribute_group adc128_group = {
> +static const struct attribute_group adc128_group = {
> .attrs = adc128_attrs,
> .is_visible = adc128_is_visible,
> };