[PATCH tip/core/rcu 0/14] Miscellaneous fixes for v4.21/v5.0

[Paul E. McKenney]

Hello!

This series contains miscellaneous fixes:

1.	Stop expedited grace periods from relying on stop-machine.

2.	Update IBM maintainers' email addresses from @linux.vnet.ibm.com
	to @linux.ibm.com.

3.	Avoid double multiply by HZ in rcu_check_gp_start_stall().

4.	Parameterize rcu_check_gp_start_stall() to allow common code
	between RCU CPU stall warnings and warnings about slow-to-start
	grace periods.

5.	Add state name to show_rcu_gp_kthreads() output.

6.	Add jiffies-since-GP-activity to show_rcu_gp_kthreads().

7.	Adjust the comment of function rcu_is_watching, courtesy of
	Zhouyi Zhou.

8.	Trace end of grace period before end of grace period.

9.	Speed up expedited GPs when interrupting RCU reader.

10.	Replace this_cpu_ptr() with __this_cpu_read() in
	rcu_preempt_need_deferred_qs()

11.	Avoid signed integer overflow in rcu_preempt_deferred_qs().

12.	Add Joel Fernandes as RCU reviewer in MAINTAINERS file.

13.	Create table of obsolete APIs in checkpatch.pl and apply to RCU,
	courtesy of Joe Perches.

14.	Make checkpatch.pl suggest lockdep instead of asserting
	!spin_is_locked().

							Thanx, Paul

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

 MAINTAINERS              |   73 +++++++++++++++++++++--------------------------
 include/linux/sched.h    |    4 +-
 kernel/rcu/tree.c        |   53 ++++++++++++++++++----------------
 kernel/rcu/tree_exp.h    |   10 ++++--
 kernel/rcu/tree_plugin.h |   37 ++++++++++++++++-------
 scripts/checkpatch.pl    |   35 ++++++++++++++++++++++
 6 files changed, 132 insertions(+), 80 deletions(-)