Commit bc25e7c3 authored by Alan Huang's avatar Alan Huang Committed by Paul E. McKenney
Browse files

docs/RCU: Add the missing rcu_read_unlock() 



We should exit the RCU read-side critical section before re-entering.

Signed-off-by: default avatarAlan Huang <mmpgouride@gmail.com>
Signed-off-by: default avatarPaul E. McKenney <paulmck@kernel.org>
parent 401013e2

Documentation/RCU/rculist_nulls.rst

+3 −1
Original line number Diff line number Diff line
@@ -29,8 +29,10 @@ algorithms: 
  rcu_read_lock()

  obj = lockless_lookup(key);

  if (obj) {

    if (!try_get_ref(obj)) // might fail for free objects

    if (!try_get_ref(obj)) { // might fail for free objects

      rcu_read_unlock();

      goto begin;

    }

    /*

    * Because a writer could delete object, and a writer could

    * reuse these object before the RCU grace period, we