Author: Peter Senna Tschudin <peter.senna@gmail.com> old_class_name, and new_class_name are never used. This patch remove the declaration and calls to kfree. The semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // @r1 forall@ type T; identifier i; @@ * T *i = NULL; … when != i * kfree(i); // Signed-off-by: Peter Senna Tschudin …