linux-kernel - [PATCH tip/core/rcu 0/24] Miscellaneous fixes for v5.10

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Date:   Mon, 31 Aug 2020 11:00:50 -0700
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     rcu@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, kernel-team@...com, mingo@...nel.org,
        jiangshanlai@...il.com, dipankar@...ibm.com,
        akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com,
        josh@...htriplett.org, tglx@...utronix.de, peterz@...radead.org,
        rostedt@...dmis.org, dhowells@...hat.com, edumazet@...gle.com,
        fweisbec@...il.com, oleg@...hat.com, joel@...lfernandes.org
Subject: [PATCH tip/core/rcu 0/24] Miscellaneous fixes for v5.10

Hello!

This series provides miscellaneous fixes:

1.	Remove KCSAN stubs from tree.c.

2.	Remove KCSAN stubs from update.c.

3.	Remove KCSAN stubs from srcutree.c.

4.	Initialize at declaration time in rcu_exp_handler().

5.	rcu/trace: Print negative GP numbers correctly.

6.	rcu/trace: Use gp_seq_req in acceleration's rcu_grace_period
	tracepoint.

7.	Clarify RCU nocb CPU error message.

8.	rcu/tree: Force quiescent state on callback overload.

9.	rcu/tree: Remove CONFIG_PREMPT_RCU check in force_qs_rnp().

10.	Remove show_rcu_nocb_state() false positive printout.

11.	Add READ_ONCE() to rcu_do_batch() access to rcu_divisor.

12.	Add READ_ONCE() to rcu_do_batch() access to rcu_resched_ns.

13.	Add READ_ONCE() to rcu_do_batch() access to rcu_kick_kthreads.

14.	Add READ_ONCE() to rcu_do_batch() access to rcu_cpu_stall_ftrace_dump.

15.	Fix kerneldoc comments in rcupdate.h.

16.	Introduce list/hlist_for_each_entry_srcu() macros.

17.	mmu: page_track: Fix RCU list API usage.

18.	Move rcu_cpu_started per-CPU variable to rcu_data.

19.	rcu/nocb: Add a warning for non-GP kthread running GP code.

20.	Clarify comments about FQS loop reporting quiescent states.

21.	Make FQS more aggressive in complaining about offline CPUs.

22.	Remove unused __rcu_is_watching() function.

23.	rcu/segcblist: Prevent useless GP start if no CBs to accelerate.

24.	Shrink each possible cpu krcp.

						Thanx, Paul

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

 arch/x86/kvm/mmu/page_track.c |    6 +-
 include/linux/rculist.h       |   48 +++++++++++++++++++++
 include/linux/rcupdate.h      |   12 ++---
 include/linux/rcutiny.h       |    1 
 include/linux/rcutree.h       |    1 
 include/trace/events/rcu.h    |   54 ++++++++++++------------
 kernel/entry/common.c         |    2 
 kernel/rcu/rcu_segcblist.c    |   10 ++++
 kernel/rcu/srcutree.c         |   13 -----
 kernel/rcu/tree.c             |   92 +++++++++++++++++++++---------------------
 kernel/rcu/tree.h             |    1 
 kernel/rcu/tree_exp.h         |    6 --
 kernel/rcu/tree_plugin.h      |    8 +--
 kernel/rcu/tree_stall.h       |    8 +--
 kernel/rcu/update.c           |   13 -----
 15 files changed, 154 insertions(+), 121 deletions(-)