[0/7] Miscellaneous fixes for v6.1

Message

Paul E. McKenney Aug. 31, 2022, 6:07 p.m. UTC

Hello!

This series contains miscellaneous fixes:

1.	Fix rcu_read_unlock_strict() strict QS reporting, courtesy
	of Zqiang.

2.	Update rcu_preempt_deferred_qs() comments for !PREEMPT kernels,
	courtesy of Zqiang.

3.	Add QS check in rcu_exp_handler() for non-preemptible kernels,
	courtesy of Zqiang.

4.	Make tiny RCU support leak callbacks for debug-object errors,
	courtesy of Zqiang.

5.	Document reason for rcu_all_qs() call to preempt_disable().

6.	Update rcu_access_pointer() header for
	rcu_dereference_protected().

7.	Try trigger_single_cpu_backtrace(cpu) in dump_cpu_task(),
	courtesy of Zhen Lei.

8.	Show the registers of 'current' in dump_cpu_task(), courtesy of
	Zhen Lei.

9.	Avoid triggering strict-GP irq-work when RCU is idle, courtesy
	of Zqiang.

10.	Exclude outgoing CPU when it is the last to leave.

						Thanx, Paul

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

 b/include/linux/rcupdate.h |   18 +++++++++++++-----
 b/kernel/rcu/tiny.c        |   17 ++++++++++++++++-
 b/kernel/rcu/tree_exp.h    |    4 +++-
 b/kernel/rcu/tree_plugin.h |    1 +
 b/kernel/rcu/tree_stall.h  |    5 ++---
 b/kernel/sched/core.c      |    3 +++
 b/kernel/smp.c             |    3 +--
 kernel/rcu/tree_plugin.h   |   21 ++++++++++++++-------
 kernel/sched/core.c        |   11 +++++++++++
 9 files changed, 64 insertions(+), 19 deletions(-)