From: David Ahern <d...@cumulusnetworks.com> Date: Sun, 3 Apr 2016 17:09:07 -0700
> + rcu_read_lock_bh(); > + > + n = __neigh_lookup_noref(&arp_tbl, &nh->nh_gw, nh->nh_dev); > + if (n) > + state = n->nud_state; > + > + rcu_read_unlock_bh(); Please use __ipv4_neigh_lookup_noref() (from net/arp.h), it inlines the comparison and hash functions and is therefore several orders of magnitude faster.
