On Thu, Dec 1, 2016 at 5:12 PM, Alexey Dobriyan <adobri...@gmail.com> wrote:
> struct net_generic {
> - unsigned int len;
> - struct rcu_head rcu;
> + struct {
> + unsigned int len;
> + struct rcu_head rcu;
> + } s;
>
> void *ptr[0];
> };I think you can put them in a union, since rcu is only used for kfree_rcu() where len is not needed and rcu_head doesn't need to be initialized by callers.
