Re: [PATCH net-next] ipv6: do lazy dst->__use update when per cpu dst is available

[Cong Wang]

On Wed, Sep 27, 2017 at 10:44 AM, Wei Wang <wei...@google.com> wrote:
> Another thing is that I don't really see any places making use of
> dst->__use. So maybe we can also get rid of this dst->__use field?

It is used in rtnl_put_cacheinfo():

        struct rta_cacheinfo ci = {
                .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse),
                .rta_used = dst->__use,
                .rta_clntref = atomic_read(&(dst->__refcnt)),
                .rta_error = error,
                .rta_id =  id,
        };