diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/rcu/tree_exp.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/rcu/tree_exp.h b/kernel/rcu/tree_exp.h index 51ca287828a2..027e123d93c7 100644 --- a/kernel/rcu/tree_exp.h +++ b/kernel/rcu/tree_exp.h @@ -533,6 +533,7 @@ static void rcu_exp_wait_wake(struct rcu_state *rsp, unsigned long s) rnp->exp_seq_rq = s; spin_unlock(&rnp->exp_lock); } + smp_mb(); /* All above changes before wakeup. */ wake_up_all(&rnp->exp_wq[(rsp->expedited_sequence >> 1) & 0x3]); } trace_rcu_exp_grace_period(rsp->name, s, TPS("endwake")); @@ -614,6 +615,7 @@ static void _synchronize_rcu_expedited(struct rcu_state *rsp, wait_event(rnp->exp_wq[(s >> 1) & 0x3], sync_exp_work_done(rsp, &rdp->exp_workdone0, s)); + smp_mb(); /* Workqueue actions happen before return. */ /* Let the next expedited grace period start. */ mutex_unlock(&rsp->exp_mutex); |
