linux-kernel - [PATCH tip/core/rcu 0/9] Miscellaneous fixes for 3.19

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Message-ID: <20141028220944.GA26114@linux.vnet.ibm.com>
Date:	Tue, 28 Oct 2014 15:09:44 -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, 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,
	bobby.prani@...il.com
Subject: [PATCH tip/core/rcu 0/9] Miscellaneous fixes for 3.19

Hello!

This series provides miscellaneous fixes:

1.	Removes the CONFIG_RCU_CPU_STALL_VERBOSE, so that RCU CPU stall
	warnings are henceforth unconditionally verbose.  (Another RCU
	Kconfig variable bites the dust!)

2.	Allow 1- and 2-byte smp_load_acquire() and smp_store_release().
	This has the side effect of removing support for pre-EV56 Alpha
	CPUs, and the official Alpha maintainers have thus far been
	silent on this issue.

3.	Use rcu_dereference() for accessing struct mapped_device,
	courtesy of Pranith Kumar.

4.	Annotate the dm_table's ->map field with __rcu, courtesy of
	Pranith Kumar.

5.	Add sparse checking for use of RCU_INIT_POINTER() on a non-__rcu
	pointer, courtesy of Pranith Kumar.

6.	Prevent cond_resched_rcu_qs() from doing gratuitous call to
	rcu_note_voluntary_context_switch().

7.	Update the list of rcu_read_unlock() potential deadlocks, courtesy
	of Oleg Nesterov.

8.	Bind rcu_tasks_kthread() to housekeeping CPUs in CONFIG_NO_HZ_FULL
	builds.

9.	Provide lockless_dereference() for times when you want
	rcu_dereference(), but without the sparse and lockdep-RCU noise.

							Thanx, Paul

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

 b/Documentation/RCU/stallwarn.txt                             |    6 --
 b/drivers/md/dm.c                                             |   10 ++--
 b/include/linux/compiler.h                                    |    2 
 b/include/linux/rcupdate.h                                    |   24 ++++++++--
 b/kernel/rcu/tree_plugin.h                                    |   13 -----
 b/kernel/rcu/update.c                                         |    3 -
 b/lib/Kconfig.debug                                           |   12 -----
 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 
 b/tools/testing/selftests/rcutorture/doc/TREE_RCU-kconfig.txt |    3 -
 19 files changed, 30 insertions(+), 54 deletions(-)

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