OpenCloudOS-Kernel/drivers/pinctrl/vt8500
Gustavo A. R. Silva 3d9c25634a 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>
2017-08-14 15:00:59 +02:00
..
Kconfig
Makefile
pinctrl-vt8500.c pinctrl: vt8500: make bool drivers explicitly non-modular 2016-11-15 10:04:20 +01:00
pinctrl-wm8505.c pinctrl: vt8500: make bool drivers explicitly non-modular 2016-11-15 10:04:20 +01:00
pinctrl-wm8650.c pinctrl: vt8500: make bool drivers explicitly non-modular 2016-11-15 10:04:20 +01:00
pinctrl-wm8750.c pinctrl: vt8500: make bool drivers explicitly non-modular 2016-11-15 10:04:20 +01:00
pinctrl-wm8850.c pinctrl: vt8500: make bool drivers explicitly non-modular 2016-11-15 10:04:20 +01:00
pinctrl-wmt.c pinctrl: vt8500: wmt: constify gpio_chip structure 2017-08-14 15:00:59 +02:00
pinctrl-wmt.h pinctrl: vt8500: make bool drivers explicitly non-modular 2016-11-15 10:04:20 +01:00