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authorGustavo A. R. Silva <garsilva@embeddedor.com>2017-07-12 00:35:19 +0300
committerLinus Walleij <linus.walleij@linaro.org>2017-08-14 16:00:59 +0300
commit115fa3fa2792ef4b13110f4459b6041d04542cfd (patch)
tree9f1db58d4d925fc55772c66e9c6c5c211b2b385a /drivers/pinctrl/pinctrl-coh901.c
parentd3761023e7a45977491f99658e767afbfff4dac3 (diff)
downloadlinux-115fa3fa2792ef4b13110f4459b6041d04542cfd.tar.xz
pinctrl: coh901: constify gpio_chip structure
This structure is only used to copy into another 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 12775 3696 64 16535 4097 drivers/pinctrl/pinctrl-coh901.o after: bss dec hex filename 12440 3640 64 16144 3f10 drivers/pinctrl/pinctrl-coh901.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/pinctrl-coh901.c')
-rw-r--r--drivers/pinctrl/pinctrl-coh901.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/pinctrl/pinctrl-coh901.c b/drivers/pinctrl/pinctrl-coh901.c
index 741b39eaeb8b..ac155e7d3412 100644
--- a/drivers/pinctrl/pinctrl-coh901.c
+++ b/drivers/pinctrl/pinctrl-coh901.c
@@ -387,7 +387,7 @@ int u300_gpio_config_set(struct gpio_chip *chip, unsigned offset,
return 0;
}
-static struct gpio_chip u300_gpio_chip = {
+static const struct gpio_chip u300_gpio_chip = {
.label = "u300-gpio-chip",
.owner = THIS_MODULE,
.request = gpiochip_generic_request,