diff --git a/fs/sysfs/mount.c b/fs/sysfs/mount.c
index 21070c286e3f..fcbe5e80aeeb 100644
--- a/fs/sysfs/mount.c
+++ b/fs/sysfs/mount.c
@@ -92,7 +92,7 @@ static int sysfs_set_super(struct super_block *sb, void *data)
 
 static void free_sysfs_super_info(struct sysfs_super_info *info)
 {
-	kobj_ns_drop(KOBJ_NS_TYPE_NET, info->ns);
+	kobj_ns_drop(KOBJ_NS_TYPE_NET, (void *)info->ns);
 	kfree(info);
 }
 
diff --git a/fs/sysfs/sysfs.h b/fs/sysfs/sysfs.h
index 6d0dcead2d6a..ce97907e2894 100644
--- a/fs/sysfs/sysfs.h
+++ b/fs/sysfs/sysfs.h
@@ -18,14 +18,14 @@
  * mount.c
  */
 
-/*
- * Each sb is associated with one namespace tag, currently the network
- * namespace of the task which mounted this sysfs instance.  If multiple
- * tags become necessary, make the following an array and compare
- * sysfs_dirent tag against every entry.
- */
 struct sysfs_super_info {
-	void *ns;
+	/*
+	 * Each sb is associated with one namespace tag, currently the network
+	 * namespace of the task which mounted this sysfs instance.  If multiple
+	 * tags become necessary, make the following an array and compare
+	 * sysfs_dirent tag against every entry.
+	 */
+	const void		*ns;
 };
 #define sysfs_info(SB) ((struct sysfs_super_info *)(SB->s_fs_info))
 extern struct sysfs_dirent sysfs_root;