diff options
author | Gustavo A. R. Silva <garsilva@embeddedor.com> | 2017-07-11 13:28:42 -0500 |
---|---|---|
committer | Linus Walleij <linus.walleij@linaro.org> | 2017-08-14 15:00:59 +0200 |
commit | 3d9c25634a24926bd5551881fa4485c1c1dcf86e (patch) | |
tree | 15bdd46a63e105a2da6fcb49c3cce676321d7a28 /drivers/pinctrl | |
parent | fa39210d41dfb96f7612d912e52e308dd74c04c4 (diff) | |
download | linux-3d9c25634a24926bd5551881fa4485c1c1dcf86e.tar.bz2 |
pinctrl: vt8500: wmt: constify gpio_chip structure
This structure is only used to copy into other structure, so declare
it as const.
This issue was detected using Coccinelle and the following semantic patch:
@r disable optional_qualifier@
identifier i;
position p;
@@
static struct gpio_chip i@p = { ... };
@ok@
identifier r.i;
expression e;
position p;
@@
e = i@p;
@bad@
position p != {r.p,ok.p};
identifier r.i;
struct gpio_chip e;
@@
e@i@p
@depends on !bad disable optional_qualifier@
identifier r.i;
@@
static
+const
struct gpio_chip i = { ... };
In the following log you can see a significant difference in the code size
and data segment, hence in the dec segment. This log is the output
of the size command, before and after the code change:
before:
text data bss dec hex filename
7754 2328 0 10082 2762 drivers/pinctrl/vt8500/pinctrl-wmt.o
after:
text data bss dec hex filename
7472 2272 0 9744 2610 drivers/pinctrl/vt8500/pinctrl-wmt.o
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl')
-rw-r--r-- | drivers/pinctrl/vt8500/pinctrl-wmt.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/pinctrl/vt8500/pinctrl-wmt.c b/drivers/pinctrl/vt8500/pinctrl-wmt.c index c207e60b734f..974e646b92d1 100644 --- a/drivers/pinctrl/vt8500/pinctrl-wmt.c +++ b/drivers/pinctrl/vt8500/pinctrl-wmt.c @@ -546,7 +546,7 @@ static int wmt_gpio_direction_output(struct gpio_chip *chip, unsigned offset, return pinctrl_gpio_direction_output(chip->base + offset); } -static struct gpio_chip wmt_gpio_chip = { +static const struct gpio_chip wmt_gpio_chip = { .label = "gpio-wmt", .owner = THIS_MODULE, .request = gpiochip_generic_request, |