Author: Julia Lawall <Julia.Lawall@lip6.fr> Netdev_priv is an accessor function, and has no purpose if its result is not used. A simplified version of the semantic match that fixes this problem is as follows: (http://coccinelle.lip6.fr/) // @@ local idexpression x; @@ -x = netdev_priv(…); … when != x // Signed-off-by: Julia Lawall Signed-off-by: David S. Miller …