kernel/Documentation/RCU/checklist.rst
.. .. @@ -214,7 +214,7 @@ 214 214 the rest of the system. 215 215 216 216 7. As of v4.20, a given kernel implements only one RCU flavor, 217 - which is RCU-sched for PREEMPTION=n and RCU-preempt for PREEMPTION=y.217 + which is RCU-sched for PREEMPT=n and RCU-preempt for PREEMPT=y.218 218 If the updater uses call_rcu() or synchronize_rcu(), 219 219 then the corresponding readers my use rcu_read_lock() and 220 220 rcu_read_unlock(), rcu_read_lock_bh() and rcu_read_unlock_bh(),