About ARP state change from Delay to Stale

Hi,

I'd a question about ARP entry state change from DELAY to STALE. I'm
referring to 3.10 Master kernel, where this particular state change
is not notified on neigh_update. In case, on creating a patch for the same, would it affect the kernel behavior ?

Could you please share as why this state change is not notified
right now?

Sriram