2017-04-01 08:23:39

by Simran Singhal

Subject: [PATCH] iio: humidity: hdc100x: constify attribute_group structures

Check for attribute_group structures that are only stored in the
attrs filed of iio_info structure. As the attrs field of iio_info
structures is constant, so these attribute_group structures can also be
declared constant.
Done using coccinelle:

@r1 disable optional_qualifier @
identifier i;
position p;
@@
static struct attribute_group i@p = {...};

@ok1@
identifier r1.i;
position p;
struct iio_info x;
@@
x.attrs=&i@p;

@bad@
position p!={r1.p,ok1.p};
identifier r1.i;
@@
i@p

@depends on !bad disable optional_qualifier@
identifier r1.i;
@@
static
+const
struct attribute_group i={...};

@depends on !bad disable optional_qualifier@
identifier r1.i;
@@
+const
struct attribute_group i;

File size before:
text data bss dec hex filename
3459 488 0 3947 f6b drivers/iio/humidity/hdc100x.o

File size after:
text data bss dec hex filename
3507 424 0 3931 f5b drivers/iio/humidity/hdc100x.o

Signed-off-by: simran singhal <[email protected]>
---
drivers/iio/humidity/hdc100x.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/humidity/hdc100x.c b/drivers/iio/humidity/hdc100x.c
index 265c34d..aa17115 100644
--- a/drivers/iio/humidity/hdc100x.c
+++ b/drivers/iio/humidity/hdc100x.c
@@ -79,7 +79,7 @@ static struct attribute *hdc100x_attributes[] = {
NULL
};

-static struct attribute_group hdc100x_attribute_group = {
+static const struct attribute_group hdc100x_attribute_group = {
.attrs = hdc100x_attributes,
};

--
2.7.4

2017-04-01 10:37:19

by Jonathan Cameron

Subject: Re: [PATCH] iio: humidity: hdc100x: constify attribute_group structures

On 01/04/17 09:23, simran singhal wrote:
> Check for attribute_group structures that are only stored in the
> attrs filed of iio_info structure. As the attrs field of iio_info
> structures is constant, so these attribute_group structures can also be
> declared constant.
> Done using coccinelle:
>
> @r1 disable optional_qualifier @
> identifier i;
> position p;
> @@
> static struct attribute_group i@p = {...};
>
> @ok1@
> identifier r1.i;
> position p;
> struct iio_info x;
> @@
> x.attrs=&i@p;
>
> @bad@
> position p!={r1.p,ok1.p};
> identifier r1.i;
> @@
> i@p
>
> @depends on !bad disable optional_qualifier@
> identifier r1.i;
> @@
> static
> +const
> struct attribute_group i={...};
>
> @depends on !bad disable optional_qualifier@
> identifier r1.i;
> @@
> +const
> struct attribute_group i;
>
> File size before:
> text data bss dec hex filename
> 3459 488 0 3947 f6b drivers/iio/humidity/hdc100x.o
>
> File size after:
> text data bss dec hex filename
> 3507 424 0 3931 f5b drivers/iio/humidity/hdc100x.o
>
> Signed-off-by: simran singhal <[email protected]>
Applied.
> ---
> drivers/iio/humidity/hdc100x.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/iio/humidity/hdc100x.c b/drivers/iio/humidity/hdc100x.c
> index 265c34d..aa17115 100644
> --- a/drivers/iio/humidity/hdc100x.c
> +++ b/drivers/iio/humidity/hdc100x.c
> @@ -79,7 +79,7 @@ static struct attribute *hdc100x_attributes[] = {
> NULL
> };
>
> -static struct attribute_group hdc100x_attribute_group = {
> +static const struct attribute_group hdc100x_attribute_group = {
> .attrs = hdc100x_attributes,
> };
>
>