linux-kernel - [PATCH tip/core/rcu 0/17] Miscellaneous fixes for 3.17

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Date:	Mon, 7 Jul 2014 15:37:56 -0700
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	linux-kernel@...r.kernel.org
Cc:	mingo@...nel.org, laijs@...fujitsu.com, dipankar@...ibm.com,
	akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com,
	josh@...htriplett.org, niv@...ibm.com, tglx@...utronix.de,
	peterz@...radead.org, rostedt@...dmis.org, dhowells@...hat.com,
	edumazet@...gle.com, dvhart@...ux.intel.com, fweisbec@...il.com,
	oleg@...hat.com, sbw@....edu
Subject: [PATCH tip/core/rcu 0/17] Miscellaneous fixes for 3.17

Hello!

This series provides miscellaneous fixes:

1.	Document deadlock-avoidance information in rcu_read_unlock()'s
	docbook comment header.

2.	Remove obsolete references to TINY_PREEMPT_RCU.

3.	Add deadlock explanation to local_irq_save() call in
	__lock_task_sighand().

4.	Make the rcu_node arrays be static const char * const,
	courtesy of Fabian Frederick.

5.	Remove redundant ACCESS_ONCE() from tick_do_timer_cpu under
	#ifdef CONFIG_NO_HZ_FULL.

6.	Eliminate read-modify-write ACCESS_ONCE() calls.

7.	Loosen __call_rcu()'s rcu_head alignment constraint to handle
	m68k's 16-bit alignment.

8.	Allow post-unlock reference for rt_mutex.

9.	Check both root and current rcu_node structures when setting up
	future grace periods, courtesy of Pranith Kumar.

10.	Simplify priority boosting by putting rt_mutex in rcu_node
	structure.

11.	Bind grace-period kthreads to no-NO_HZ_FULL CPUs instead of the
	timekeeping CPU, at least for CONFIG_NO_HZ_FULL_SYSIDLE=n.

12.	Don't use NMIs to dump other CPUs' stacks.

13.	Use __this_cpu_read() instead of per_cpu_ptr(), courtesy of Shan Wei.

14.	Remove CONFIG_PROVE_RCU_DELAY.

15.	Fix __rcu_reclaim to use true/false instead of 1/0.

16.	Fix sparse warning in rcu_initiate_boost(), courtesy of Pranith
	Kumar.

17.	Fix sparse warning in rcu_report_unblock_qs_rnp(), again courtesy
	of Pranith Kumar.

							Thanx, Paul

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

 b/include/linux/init_task.h                               |    9 --
 b/include/linux/rcupdate.h                                |   45 ++++++++--
 b/include/linux/sched.h                                   |    6 -
 b/include/linux/tick.h                                    |   19 ++++
 b/init/Kconfig                                            |    2 
 b/kernel/rcu/rcu.h                                        |    8 +
 b/kernel/rcu/srcu.c                                       |    4 
 b/kernel/rcu/tree.c                                       |   59 ++++++--------
 b/kernel/rcu/tree.h                                       |    8 +
 b/kernel/rcu/tree_plugin.h                                |   52 +++++++-----
 b/kernel/rcu/update.c                                     |    3 
 b/kernel/signal.c                                         |    4 
 b/kernel/time/tick-sched.c                                |   10 ++
 b/tools/testing/selftests/rcutorture/configs/rcu/TREE01   |    1 
 b/tools/testing/selftests/rcutorture/configs/rcu/TREE02   |    1 
 b/tools/testing/selftests/rcutorture/configs/rcu/TREE02-T |    1 
 b/tools/testing/selftests/rcutorture/configs/rcu/TREE03   |    1 
 b/tools/testing/selftests/rcutorture/configs/rcu/TREE04   |    1 
 b/tools/testing/selftests/rcutorture/configs/rcu/TREE05   |    1 
 b/tools/testing/selftests/rcutorture/configs/rcu/TREE06   |    1 
 b/tools/testing/selftests/rcutorture/configs/rcu/TREE07   |    1 
 b/tools/testing/selftests/rcutorture/configs/rcu/TREE08   |    1 
 b/tools/testing/selftests/rcutorture/configs/rcu/TREE08-T |    1 
 b/tools/testing/selftests/rcutorture/configs/rcu/TREE09   |    1 
 24 files changed, 147 insertions(+), 93 deletions(-)

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