[PATCH v2] ACPI: use sysfs_emit() to instead of scnprintf()

[PATCH v2] ACPI: use sysfs_emit() to instead of scnprintf()

[ye.xingchen]

From: ye xingchen <ye.xingchen@zte.com.cn>

Replace the open-code with sysfs_emit() to simplify the code.

Signed-off-by: ye xingchen <ye.xingchen@zte.com.cn>
---
v1 -> v2
combine patchs in drivers/acpi/.
 drivers/acpi/acpi_pad.c  | 4 ++--
 drivers/acpi/cppc_acpi.c | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/acpi/acpi_pad.c b/drivers/acpi/acpi_pad.c
index edbb28faee2a..02f1a1b1143c 100644
--- a/drivers/acpi/acpi_pad.c
+++ b/drivers/acpi/acpi_pad.c
@@ -287,7 +287,7 @@ static ssize_t rrtime_store(struct device *dev,
 static ssize_t rrtime_show(struct device *dev,
 	struct device_attribute *attr, char *buf)
 {
-	return scnprintf(buf, PAGE_SIZE, "%d\n", round_robin_time);
+	return sysfs_emit(buf, "%d\n", round_robin_time);
 }
 static DEVICE_ATTR_RW(rrtime);

@@ -309,7 +309,7 @@ static ssize_t idlepct_store(struct device *dev,
 static ssize_t idlepct_show(struct device *dev,
 	struct device_attribute *attr, char *buf)
 {
-	return scnprintf(buf, PAGE_SIZE, "%d\n", idle_pct);
+	return sysfs_emit(buf, "%d\n", idle_pct);
 }
 static DEVICE_ATTR_RW(idlepct);

diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c
index 093675b1a1ff..0f17b1c32718 100644
--- a/drivers/acpi/cppc_acpi.c
+++ b/drivers/acpi/cppc_acpi.c
@@ -148,7 +148,7 @@ __ATTR(_name, 0444, show_##_name, NULL)
 		if (ret)						\
 			return ret;					\
 									\
-		return scnprintf(buf, PAGE_SIZE, "%llu\n",		\
+		return sysfs_emit(buf, "%llu\n",		\
 				(u64)st_name.member_name);		\
 	}								\
 	define_one_cppc_ro(member_name)
@@ -174,7 +174,7 @@ static ssize_t show_feedback_ctrs(struct kobject *kobj,
 	if (ret)
 		return ret;

-	return scnprintf(buf, PAGE_SIZE, "ref:%llu del:%llu\n",
+	return sysfs_emit(buf, "ref:%llu del:%llu\n",
 			fb_ctrs.reference, fb_ctrs.delivered);
 }
 define_one_cppc_ro(feedback_ctrs);
-- 
2.25.1

Re: [PATCH v2] ACPI: use sysfs_emit() to instead of scnprintf()

[Rafael J. Wysocki]

On Wed, Nov 30, 2022 at 9:16 AM <ye.xingchen@zte.com.cn> wrote:
>
> From: ye xingchen <ye.xingchen@zte.com.cn>
>
> Replace the open-code with sysfs_emit() to simplify the code.
>
> Signed-off-by: ye xingchen <ye.xingchen@zte.com.cn>
> ---
> v1 -> v2
> combine patchs in drivers/acpi/.
>  drivers/acpi/acpi_pad.c  | 4 ++--
>  drivers/acpi/cppc_acpi.c | 4 ++--
>  2 files changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/acpi/acpi_pad.c b/drivers/acpi/acpi_pad.c
> index edbb28faee2a..02f1a1b1143c 100644
> --- a/drivers/acpi/acpi_pad.c
> +++ b/drivers/acpi/acpi_pad.c
> @@ -287,7 +287,7 @@ static ssize_t rrtime_store(struct device *dev,
>  static ssize_t rrtime_show(struct device *dev,
>         struct device_attribute *attr, char *buf)
>  {
> -       return scnprintf(buf, PAGE_SIZE, "%d\n", round_robin_time);
> +       return sysfs_emit(buf, "%d\n", round_robin_time);
>  }
>  static DEVICE_ATTR_RW(rrtime);
>
> @@ -309,7 +309,7 @@ static ssize_t idlepct_store(struct device *dev,
>  static ssize_t idlepct_show(struct device *dev,
>         struct device_attribute *attr, char *buf)
>  {
> -       return scnprintf(buf, PAGE_SIZE, "%d\n", idle_pct);
> +       return sysfs_emit(buf, "%d\n", idle_pct);
>  }
>  static DEVICE_ATTR_RW(idlepct);
>
> diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c
> index 093675b1a1ff..0f17b1c32718 100644
> --- a/drivers/acpi/cppc_acpi.c
> +++ b/drivers/acpi/cppc_acpi.c
> @@ -148,7 +148,7 @@ __ATTR(_name, 0444, show_##_name, NULL)
>                 if (ret)                                                \
>                         return ret;                                     \
>                                                                         \
> -               return scnprintf(buf, PAGE_SIZE, "%llu\n",              \
> +               return sysfs_emit(buf, "%llu\n",                \
>                                 (u64)st_name.member_name);              \
>         }                                                               \
>         define_one_cppc_ro(member_name)
> @@ -174,7 +174,7 @@ static ssize_t show_feedback_ctrs(struct kobject *kobj,
>         if (ret)
>                 return ret;
>
> -       return scnprintf(buf, PAGE_SIZE, "ref:%llu del:%llu\n",
> +       return sysfs_emit(buf, "ref:%llu del:%llu\n",
>                         fb_ctrs.reference, fb_ctrs.delivered);
>  }
>  define_one_cppc_ro(feedback_ctrs);
> --

Applied as 6.2 material, thanks!