[PATCH tip/core/rcu 0/20] Documentation updates for v4.21/v5.0

[Paul E. McKenney]

Hello!

This series provides documentation updates:

1.	Set down forward-progress requirements.

2.	Clarify RCU data-structure comment about rcu_tree fanout,
	courtesy of Joel Fernandes.

3.	Remove rcu_preempt_state reference in stallwarn, courtesy of
	Joel Fernandes.

4.	Update information about resched_cpu, courtesy of Joel Fernandes.

5.	Remove rcu_dynticks from Data-Structures, courtesy of Joel
	Fernandes.

6.	Update Data-Structures for RCU flavor consolidation, courtesy of
	Joel Fernandes.

7.	Better clarify the rcu_segcblist ->len field, courtesy of Joel
	Fernandes.

8. 	Update description of gp_seq fields in rcu_data, courtesy of
	Joel Fernandes.

9.	Document rcutorture forward-progress test kernel parameters.

10.	Update core and full API in whatisRCU, courtesy of Joel Fernandes.

11.	Add more rationale for using rcu_read_lock_sched() in checklist,
	courtesy of Joel Fernandes.

12.	Remove obsolete suggestion from checklist, courtesy of Joel
	Fernandes.

13.	Remove obsolete checklist item about synchronize_rcu() usage,
	courtesy of Joel Fernandes.

14.	Encourage use of rcu_barrier in checklist, courtesy of Joel
	Fernandes.

15.	Make reader aware of rcu_dereference_protected(), courtesy of
	Joel Fernandes.

16.	Remove obsolete (non-)requirement about disabling preemption,
	courtesy of Joel Fernandes.

17.	Make listing in RCU perf/scale requirements use rcu_assign_pointer(),
	courtesy of Joel Fernandes.

18.	RCU scheduler spinlock rcu_read_unlock() restriction remains.

19.	Correct the parameter in stallwarn, courtesy of Joel Fernandes.

20.	Fix "struction" typo in RCU memory-ordering documentation,
	courtesy of Joel Fernandes.

							Thanx, Paul

------------------------------------------------------------------------

 Documentation/RCU/Design/Data-Structures/BigTreeClassicRCUBH.svg                |  499 -----
 Documentation/RCU/Design/Data-Structures/BigTreeClassicRCUBHdyntick.svg         |  695 --------
 Documentation/RCU/Design/Data-Structures/BigTreePreemptRCUBHdyntick.svg         |  741 --------
 b/Documentation/RCU/Design/Data-Structures/BigTreePreemptRCUBHdyntickCB.svg     |  834 +++-------
 b/Documentation/RCU/Design/Data-Structures/Data-Structures.html                 |  177 --
 b/Documentation/RCU/Design/Data-Structures/blkd_task.svg                        |  676 ++------
 b/Documentation/RCU/Design/Expedited-Grace-Periods/Expedited-Grace-Periods.html |    6 
 b/Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.html        |    2 
 b/Documentation/RCU/Design/Requirements/Requirements.html                       |  206 +-
 b/Documentation/RCU/checklist.txt                                               |   49 
 b/Documentation/RCU/stallwarn.txt                                               |    7 
 b/Documentation/RCU/whatisRCU.txt                                               |   70 
 b/Documentation/admin-guide/kernel-parameters.txt                               |   17 
 13 files changed, 823 insertions(+), 3156 deletions(-)