NUM_RCU_LVL_2      71 include/linux/rcu_node_tree.h #  define NUM_RCU_LVL_2	      DIV_ROUND_UP(NR_CPUS, RCU_FANOUT_1)
NUM_RCU_LVL_2      80 include/linux/rcu_node_tree.h #  define NUM_RCU_LVL_2	      DIV_ROUND_UP(NR_CPUS, RCU_FANOUT_2)