synchronize_rcu_bh — wait until an rcu_bh grace period has elapsed.
void synchronize_rcu_bh ( | void); |
Control will return to the caller some time after a full rcu_bh grace
period has elapsed, in other words after all currently executing rcu_bh
read-side critical sections have completed. RCU read-side critical
sections are delimited by rcu_read_lock_bh and rcu_read_unlock_bh,
and may be nested.
See the description of synchronize_sched for more detailed information
on memory ordering guarantees.