rcu_dereference_bh_check 826 include/linux/rcupdate.h #define rcu_dereference_bh(p) rcu_dereference_bh_check(p, 0) rcu_dereference_bh_check 57 include/linux/rtnetlink.h rcu_dereference_bh_check(p, lockdep_rtnl_is_held())