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authorGustavo A. R. Silva <garsilva@embeddedor.com>2017-07-11 21:28:42 +0300
committerLinus Walleij <linus.walleij@linaro.org>2017-08-14 16:00:59 +0300
commit3d9c25634a24926bd5551881fa4485c1c1dcf86e (patch)
tree15bdd46a63e105a2da6fcb49c3cce676321d7a28 /drivers/pinctrl/vt8500
parentfa39210d41dfb96f7612d912e52e308dd74c04c4 (diff)
downloadlinux-3d9c25634a24926bd5551881fa4485c1c1dcf86e.tar.xz
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/vt8500')
-rw-r--r--drivers/pinctrl/vt8500/pinctrl-wmt.c2
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,