diff options
author | Gustavo A. R. Silva <garsilva@embeddedor.com> | 2017-07-12 00:29:29 +0300 |
---|---|---|
committer | Linus Walleij <linus.walleij@linaro.org> | 2017-08-14 16:00:59 +0300 |
commit | d3761023e7a45977491f99658e767afbfff4dac3 (patch) | |
tree | 0d31e1340190bd32275a2542310f67b18695ffaf /drivers/pinctrl/nomadik | |
parent | 3d9c25634a24926bd5551881fa4485c1c1dcf86e (diff) | |
download | linux-d3761023e7a45977491f99658e767afbfff4dac3.tar.xz |
pinctrl: nomadik: abx500: 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
17545 5376 0 22921 5989 drivers/pinctrl/nomadik/pinctrl-abx500.o
after:
bss dec hex filename
17273 5320 0 22593 5841 drivers/pinctrl/nomadik/pinctrl-abx500.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/nomadik')
-rw-r--r-- | drivers/pinctrl/nomadik/pinctrl-abx500.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/pinctrl/nomadik/pinctrl-abx500.c b/drivers/pinctrl/nomadik/pinctrl-abx500.c index f95001bc1d58..b32c0d602024 100644 --- a/drivers/pinctrl/nomadik/pinctrl-abx500.c +++ b/drivers/pinctrl/nomadik/pinctrl-abx500.c @@ -647,7 +647,7 @@ static inline void abx500_gpio_dbg_show_one(struct seq_file *s, #define abx500_gpio_dbg_show NULL #endif -static struct gpio_chip abx500gpio_chip = { +static const struct gpio_chip abx500gpio_chip = { .label = "abx500-gpio", .owner = THIS_MODULE, .request = gpiochip_generic_request, |