Follow the advice in Documentation/filesystems/sysfs.rst:
show() should only use sysfs_emit() or sysfs_emit_at() when formatting
the value to be returned to user space.

Signed-off-by: chen zhang <chenzhang@kylinos.cn>
---
 drivers/platform/x86/ibm_rtl.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/platform/x86/ibm_rtl.c b/drivers/platform/x86/ibm_rtl.c
index 231b37909801..c533b240534f 100644
--- a/drivers/platform/x86/ibm_rtl.c
+++ b/drivers/platform/x86/ibm_rtl.c
@@ -13,6 +13,7 @@
 #include <linux/kernel.h>
 #include <linux/delay.h>
 #include <linux/module.h>
+#include <linux/sysfs.h>
 #include <linux/io.h>
 #include <linux/dmi.h>
 #include <linux/efi.h>
@@ -144,14 +145,14 @@ static ssize_t rtl_show_version(struct device *dev,
                                 struct device_attribute *attr,
                                 char *buf)
 {
-	return sprintf(buf, "%d\n", (int)ioread8(&rtl_table->version));
+	return sysfs_emit(buf, "%d\n", (int)ioread8(&rtl_table->version));
 }
 
 static ssize_t rtl_show_state(struct device *dev,
                               struct device_attribute *attr,
                               char *buf)
 {
-	return sprintf(buf, "%d\n", ioread8(&rtl_table->rt_status));
+	return sysfs_emit(buf, "%d\n", ioread8(&rtl_table->rt_status));
 }
 
 static ssize_t rtl_set_state(struct device *dev,
-- 
2.25.1