barrier_mutex 91 kernel/rcu/tree.c .barrier_mutex = __MUTEX_INITIALIZER(rcu_state.barrier_mutex), barrier_mutex 2895 kernel/rcu/tree.c mutex_lock(&rcu_state.barrier_mutex); barrier_mutex 2902 kernel/rcu/tree.c mutex_unlock(&rcu_state.barrier_mutex); barrier_mutex 2956 kernel/rcu/tree.c mutex_unlock(&rcu_state.barrier_mutex); barrier_mutex 311 kernel/rcu/tree.h struct mutex barrier_mutex; /* Guards barrier fields. */