linux-kernel - [tip: smp/core] kernel/cpu: Convert snprintf() to sysfs

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Date: Fri, 26 Jan 2024 17:32:20 -0000
From: "tip-bot2 for Li Zhijian" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Li Zhijian <lizhijian@...itsu.com>, Thomas Gleixner <tglx@...utronix.de>,
 x86@...nel.org, linux-kernel@...r.kernel.org
Subject: [tip: smp/core] kernel/cpu: Convert snprintf() to sysfs_emit()

The following commit has been merged into the smp/core branch of tip:

Commit-ID:     effe6d278e06f85289b6ada0402a6d16ebc149a5
Gitweb:        https://git.kernel.org/tip/effe6d278e06f85289b6ada0402a6d16ebc149a5
Author:        Li Zhijian <lizhijian@...itsu.com>
AuthorDate:    Tue, 16 Jan 2024 12:51:51 +08:00
Committer:     Thomas Gleixner <tglx@...utronix.de>
CommitterDate: Fri, 26 Jan 2024 18:25:16 +01:00

kernel/cpu: Convert snprintf() to sysfs_emit()

Per filesystems/sysfs.rst, show() should only use sysfs_emit()
or sysfs_emit_at() when formatting the value to be returned to user space.

coccinelle complains that there are still a couple of functions that use
snprintf(). Convert them to sysfs_emit().

No functional change intended.

Signed-off-by: Li Zhijian <lizhijian@...itsu.com>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Link: https://lore.kernel.org/r/20240116045151.3940401-40-lizhijian@fujitsu.com

---
 kernel/cpu.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/cpu.c b/kernel/cpu.c
index f059375..ad7d0b0 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -3004,7 +3004,7 @@ static ssize_t control_show(struct device *dev,
 		return sysfs_emit(buf, "%d\n", cpu_smt_num_threads);
 #endif
 
-	return snprintf(buf, PAGE_SIZE - 2, "%s\n", state);
+	return sysfs_emit(buf, "%s\n", state);
 }
 
 static ssize_t control_store(struct device *dev, struct device_attribute *attr,
@@ -3017,7 +3017,7 @@ static DEVICE_ATTR_RW(control);
 static ssize_t active_show(struct device *dev,
 			   struct device_attribute *attr, char *buf)
 {
-	return snprintf(buf, PAGE_SIZE - 2, "%d\n", sched_smt_active());
+	return sysfs_emit(buf, "%d\n", sched_smt_active());
 }
 static DEVICE_ATTR_RO(active);