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authorGustavo A. R. Silva <garsilva@embeddedor.com>2017-07-11 21:15:19 +0300
committerLinus Walleij <linus.walleij@linaro.org>2017-08-14 16:01:01 +0300
commitfe4f86affd43076b2b28da6eaf9341428ae94787 (patch)
tree5a9a4bb387244fff0df6c7de27517d51cffc4188 /drivers/pinctrl/pinctrl-st.c
parentb5894d129b90f6600ac7e3420ac813c74054319b (diff)
downloadlinux-fe4f86affd43076b2b28da6eaf9341428ae94787.tar.xz
pinctrl: st: 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 21671 3632 128 25431 6357 drivers/pinctrl/pinctrl-st.o after: text data bss dec hex filename 21366 3576 128 25070 61ee drivers/pinctrl/pinctrl-st.o Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com> Acked-by: Patrice Chotard <patrice.chotard@st.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/pinctrl-st.c')
-rw-r--r--drivers/pinctrl/pinctrl-st.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/pinctrl/pinctrl-st.c b/drivers/pinctrl/pinctrl-st.c
index 3ae8066bc127..5d4789daf396 100644
--- a/drivers/pinctrl/pinctrl-st.c
+++ b/drivers/pinctrl/pinctrl-st.c
@@ -1442,7 +1442,7 @@ static void st_gpio_irqmux_handler(struct irq_desc *desc)
chained_irq_exit(chip, desc);
}
-static struct gpio_chip st_gpio_template = {
+static const struct gpio_chip st_gpio_template = {
.request = gpiochip_generic_request,
.free = gpiochip_generic_free,
.get = st_gpio_get,