diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index 00012e31829d..602f56db0442 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -485,8 +485,8 @@ const struct file_operations sysfs_file_operations = {
 	.poll		= sysfs_poll,
 };
 
-int sysfs_attr_ns(struct kobject *kobj, const struct attribute *attr,
-		  const void **pns)
+static int sysfs_attr_ns(struct kobject *kobj, const struct attribute *attr,
+			 const void **pns)
 {
 	struct sysfs_dirent *dir_sd = kobj->sd;
 	const struct sysfs_ops *ops;