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| -rw-r--r-- | Documentation/RCU/Design/Requirements/Requirements.rst | 28 |
1 files changed, 14 insertions, 14 deletions
diff --git a/Documentation/RCU/Design/Requirements/Requirements.rst b/Documentation/RCU/Design/Requirements/Requirements.rst index 9b23be637e17..1e3df779c9c1 100644 --- a/Documentation/RCU/Design/Requirements/Requirements.rst +++ b/Documentation/RCU/Design/Requirements/Requirements.rst @@ -2438,13 +2438,13 @@ glance as if rcu_read_unlock_bh() was executing very slowly. The `RCU-bh API <https://lwn.net/Articles/609973/#RCU%20Per-Flavor%20API%20Table>`__ -includes rcu_read_lock_bh(), rcu_read_unlock_bh(), -rcu_dereference_bh(), rcu_dereference_bh_check(), -synchronize_rcu_bh(), synchronize_rcu_bh_expedited(), -call_rcu_bh(), rcu_barrier_bh(), and -rcu_read_lock_bh_held(). However, the update-side APIs are now -simple wrappers for other RCU flavors, namely RCU-sched in -CONFIG_PREEMPT=n kernels and RCU-preempt otherwise. +includes rcu_read_lock_bh(), rcu_read_unlock_bh(), rcu_dereference_bh(), +rcu_dereference_bh_check(), and rcu_read_lock_bh_held(). However, the +old RCU-bh update-side APIs are now gone, replaced by synchronize_rcu(), +synchronize_rcu_expedited(), call_rcu(), and rcu_barrier(). In addition, +anything that disables bottom halves also marks an RCU-bh read-side +critical section, including local_bh_disable() and local_bh_enable(), +local_irq_save() and local_irq_restore(), and so on. Sched Flavor (Historical) ~~~~~~~~~~~~~~~~~~~~~~~~~ @@ -2481,13 +2481,13 @@ The `RCU-sched API <https://lwn.net/Articles/609973/#RCU%20Per-Flavor%20API%20Table>`__ includes rcu_read_lock_sched(), rcu_read_unlock_sched(), rcu_read_lock_sched_notrace(), rcu_read_unlock_sched_notrace(), -rcu_dereference_sched(), rcu_dereference_sched_check(), -synchronize_sched(), synchronize_rcu_sched_expedited(), -call_rcu_sched(), rcu_barrier_sched(), and -rcu_read_lock_sched_held(). However, anything that disables -preemption also marks an RCU-sched read-side critical section, including -preempt_disable() and preempt_enable(), local_irq_save() and -local_irq_restore(), and so on. +rcu_dereference_sched(), rcu_dereference_sched_check(), and +rcu_read_lock_sched_held(). However, the old RCU-sched update-side APIs +are now gone, replaced by synchronize_rcu(), synchronize_rcu_expedited(), +call_rcu(), and rcu_barrier(). In addition, anything that disables +preemption also marks an RCU-sched read-side critical section, +including preempt_disable() and preempt_enable(), local_irq_save() +and local_irq_restore(), and so on. Sleepable RCU ~~~~~~~~~~~~~ |