linux-kernel - [PATCH 42/42] kernel/cpu: Convert snprintf to sysfs

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Message-Id: <20240116045151.3940401-40-lizhijian@fujitsu.com>
Date: Tue, 16 Jan 2024 12:51:51 +0800
From: Li Zhijian <lizhijian@...itsu.com>
To: linux-kernel@...r.kernel.org
Cc: Li Zhijian <lizhijian@...itsu.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>
Subject: [PATCH 42/42] 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().

> ./kernel/cpu.c:3013:8-16: WARNING: please use sysfs_emit
> ./kernel/cpu.c:3026:8-16: WARNING: please use sysfs_emit

No functional change intended

CC: Thomas Gleixner <tglx@...utronix.de>
CC: Peter Zijlstra <peterz@...radead.org>
Signed-off-by: Li Zhijian <lizhijian@...itsu.com>
---
 kernel/cpu.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/cpu.c b/kernel/cpu.c
index a86972a91991..a36fcf4a9eb6 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -3010,7 +3010,7 @@ 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,
@@ -3023,7 +3023,7 @@ 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);
 
-- 
2.29.2