Merge branch 'rcu-nocb.20260123a'

* rcu-nocb.20260123a:
  rcu/nocb: Extract nocb_defer_wakeup_cancel() helper
  rcu/nocb: Remove dead callback overload handling
  rcu/nocb: Remove unnecessary WakeOvfIsDeferred wake path

diff --cc kernel/rcu/tree.c
Simple merge

diff --cc kernel/rcu/tree.h
Simple merge