Hello! This series provides some RCU Tasks updates: 1. rcu-tasks: Use accurate runstart time for RCU Tasks boot-time testing, courtesy of Zqiang. 2. rcu-tasks: Improve comments explaining tasks_rcu_exit_srcu purpose, courtesy of Frederic Weisbecker. 3. rcu-tasks: Remove preemption disablement around srcu_read_[un]lock() calls, courtesy of Frederic Weisbecker. 4. rcu-tasks: Fix synchronize_rcu_tasks() VS zap_pid_ns_processes(), courtesy of Frederic Weisbecker. 5. rcu-tasks: Make rude RCU-Tasks work well with CPU hotplug, courtesy of Zqiang. 6. rcu-tasks: Handle queue-shrink/callback-enqueue race condition, courtesy of Zqiang. Thanx, Paul ------------------------------------------------------------------------ b/include/linux/rcupdate.h | 2 + b/kernel/pid_namespace.c | 17 +++++++++ b/kernel/rcu/tasks.h | 8 +--- kernel/rcu/tasks.h | 77 ++++++++++++++++++++++++++++++--------------- 4 files changed, 75 insertions(+), 29 deletions(-)