CONFIG_RCU_CPU_STALL_TIMEOUT  470 kernel/rcu/update.c int rcu_cpu_stall_timeout __read_mostly = CONFIG_RCU_CPU_STALL_TIMEOUT;
CONFIG_RCU_CPU_STALL_TIMEOUT  915 kernel/rcu/update.c 	if (rcu_cpu_stall_timeout != CONFIG_RCU_CPU_STALL_TIMEOUT)