| Message ID | 20170711183414.GA24866@embeddedgus |
|---|---|
| State | New |
| Headers | show |
On Tue 11 Jul 11:34 PDT 2017, Gustavo A. R. Silva wrote: [..] > 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 "dec" is for "decimal" and is the sum of text, data and bss... > of the size command, before and after the code change: > > before: > text data bss dec hex filename > 13129 2808 192 16129 3f01 drivers/pinctrl/qcom/pinctrl-msm.o > > after: > text data bss dec hex filename > 12839 2720 192 15751 3d87 drivers/pinctrl/qcom/pinctrl-msm.o > > Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com> Good catch, thanks! Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Regards, Bjorn > --- > drivers/pinctrl/qcom/pinctrl-msm.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/pinctrl/qcom/pinctrl-msm.c b/drivers/pinctrl/qcom/pinctrl-msm.c > index 273badd..245ccfd 100644 > --- a/drivers/pinctrl/qcom/pinctrl-msm.c > +++ b/drivers/pinctrl/qcom/pinctrl-msm.c > @@ -521,7 +521,7 @@ static void msm_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip) > #define msm_gpio_dbg_show NULL > #endif > > -static struct gpio_chip msm_gpio_template = { > +static const struct gpio_chip msm_gpio_template = { > .direction_input = msm_gpio_direction_input, > .direction_output = msm_gpio_direction_output, > .get_direction = msm_gpio_get_direction, > -- > 2.5.0 > -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi Bjorn, Quoting Bjorn Andersson <bjorn.andersson@linaro.org>: > On Tue 11 Jul 11:34 PDT 2017, Gustavo A. R. Silva wrote: > [..] >> 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 > > "dec" is for "decimal" and is the sum of text, data and bss... > You are right. :) >> of the size command, before and after the code change: >> >> before: >> text data bss dec hex filename >> 13129 2808 192 16129 3f01 drivers/pinctrl/qcom/pinctrl-msm.o >> >> after: >> text data bss dec hex filename >> 12839 2720 192 15751 3d87 drivers/pinctrl/qcom/pinctrl-msm.o >> >> Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com> > > Good catch, thanks! > Absolutely, glad to help! > Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> > > Regards, > Bjorn > >> --- >> drivers/pinctrl/qcom/pinctrl-msm.c | 2 +- >> 1 file changed, 1 insertion(+), 1 deletion(-) >> >> diff --git a/drivers/pinctrl/qcom/pinctrl-msm.c >> b/drivers/pinctrl/qcom/pinctrl-msm.c >> index 273badd..245ccfd 100644 >> --- a/drivers/pinctrl/qcom/pinctrl-msm.c >> +++ b/drivers/pinctrl/qcom/pinctrl-msm.c >> @@ -521,7 +521,7 @@ static void msm_gpio_dbg_show(struct seq_file >> *s, struct gpio_chip *chip) >> #define msm_gpio_dbg_show NULL >> #endif >> >> -static struct gpio_chip msm_gpio_template = { >> +static const struct gpio_chip msm_gpio_template = { >> .direction_input = msm_gpio_direction_input, >> .direction_output = msm_gpio_direction_output, >> .get_direction = msm_gpio_get_direction, >> -- >> 2.5.0 >> -- Gustavo A. R. Silva -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Tue, Jul 11, 2017 at 8:34 PM, Gustavo A. R. Silva <garsilva@embeddedor.com> wrote: > 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 > 13129 2808 192 16129 3f01 drivers/pinctrl/qcom/pinctrl-msm.o > > after: > text data bss dec hex filename > 12839 2720 192 15751 3d87 drivers/pinctrl/qcom/pinctrl-msm.o > > Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com> Patch applied with Björn's ACK. Yours, Linus Walleij -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/pinctrl/qcom/pinctrl-msm.c b/drivers/pinctrl/qcom/pinctrl-msm.c index 273badd..245ccfd 100644 --- a/drivers/pinctrl/qcom/pinctrl-msm.c +++ b/drivers/pinctrl/qcom/pinctrl-msm.c @@ -521,7 +521,7 @@ static void msm_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip) #define msm_gpio_dbg_show NULL #endif -static struct gpio_chip msm_gpio_template = { +static const struct gpio_chip msm_gpio_template = { .direction_input = msm_gpio_direction_input, .direction_output = msm_gpio_direction_output, .get_direction = msm_gpio_get_direction,
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 13129 2808 192 16129 3f01 drivers/pinctrl/qcom/pinctrl-msm.o after: text data bss dec hex filename 12839 2720 192 15751 3d87 drivers/pinctrl/qcom/pinctrl-msm.o Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com> --- drivers/pinctrl/qcom/pinctrl-msm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)