diff options
Diffstat (limited to 'Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst')
| -rw-r--r-- | Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst b/Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst index 5750f125361b..1a5ff1a9f02e 100644 --- a/Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst +++ b/Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst @@ -147,11 +147,11 @@ RCU read-side critical sections preceding and following the current idle sojourn. This case is handled by calls to the strongly ordered ``atomic_add_return()`` read-modify-write atomic operation that -is invoked within ``rcu_dynticks_eqs_enter()`` at idle-entry -time and within ``rcu_dynticks_eqs_exit()`` at idle-exit time. -The grace-period kthread invokes ``rcu_dynticks_snap()`` and -``rcu_dynticks_in_eqs_since()`` (both of which invoke -an ``atomic_add_return()`` of zero) to detect idle CPUs. +is invoked within ``ct_kernel_exit_state()`` at idle-entry +time and within ``ct_kernel_enter_state()`` at idle-exit time. +The grace-period kthread invokes first ``ct_rcu_watching_cpu_acquire()`` +(preceded by a full memory barrier) and ``rcu_watching_snap_stopped_since()`` +(both of which rely on acquire semantics) to detect idle CPUs. +-----------------------------------------------------------------------+ | **Quick Quiz**: | |