linux-kernel - [PATCH 3/3] perf/x86/amd:Convert snprintf() to sysfs

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Message-ID: <ZUWJAFlP2pM6ko0-@octinomon>
Date:   Fri, 3 Nov 2023 23:57:52 +0000
From:   Jules Irenge <jbi.octave@...il.com>
To:     irogers@...gle.com
Cc:     adrian.hunter@...el.com, tglx@...utronix.de, bp@...en8.de,
        dave.hansen@...ux.intel.com, x86@...nel.org, hpa@...or.com,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 3/3]  perf/x86/amd:Convert snprintf() to sysfs_emit()

Coccinelle reports a warning
WARNING: use scnprintf or sprintf

Following the advice on kernel documentation
https://www.kernel.org/doc/html/latest/filesystems/sysfs.html

For show(device *...) functions, only use sysfs_emit() or sysfs_emit_at()
especially when formatting the value to be returned to user space.
Convert snprintf() to sysfs_emit()

Signed-off-by: Jules Irenge <jbi.octave@...il.com>
---
 arch/x86/events/amd/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/events/amd/core.c b/arch/x86/events/amd/core.c
index e24976593a29..f2fef75d464c 100644
--- a/arch/x86/events/amd/core.c
+++ b/arch/x86/events/amd/core.c
@@ -1279,7 +1279,7 @@ static ssize_t branches_show(struct device *cdev,
 			      struct device_attribute *attr,
 			      char *buf)
 {
-	return snprintf(buf, PAGE_SIZE, "%d\n", x86_pmu.lbr_nr);
+	return sysfs_emit(buf, "%d\n", x86_pmu.lbr_nr);
 }
 
 static DEVICE_ATTR_RO(branches);
-- 
2.41.0