Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

Pull RCU updates from Thomas Gleixner:
 "A large update to RCU:

  Preparatory work for consolidating the RCU flavors:

   - Introduce grace-period sequence numbers to the RCU-bh, RCU-preempt,
     and RCU-sched flavors, replacing the old ->gpnum and ->completed
     pair of fields.

     This change allows lockless code to obtain the complete
     grace-period state with a single READ_ONCE(), which is needed to
     maintain tolerable lock contention during the upcoming
     consolidation of the three RCU flavors.

     Note that grace-period sequence numbers are already used by
     rcu_barrier(), expedited RCU grace periods, and SRCU, and are thus
     already heavily used and well-tested. Joel Fernandes contributed a
     number of excellent fixes and improvements.

   - Clean up some grace-period-reporting loose ends, including
     improving the handling of quiescent states from offline CPUs and
     fixing some false-positive WARN_ON_ONCE() invocations.

     (Strictly speaking, the WARN_ON_ONCE() invocations were quite
     correct, but their invariants were (harmlessly) violated by the
     earlier sloppy handling of quiescent states from offline CPUs.)

     In addition, improve grace-period forward-progress guarantees so as
     to allow removal of fail-safe checks that required otherwise
     needless lock acquisitions. Finally, add more diagnostics to help
     debug the upcoming consolidation of the RCU-bh, RCU-preempt, and
     RCU-sched flavors.

  The rest:

   - SRCU updates

   - Updates to rcutorture and associated scripting.

   - The usual pile of miscellaneous fixes"

* 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (118 commits)
  rcutorture: Fix rcu_barrier successes counter
  rcutorture: Add support to detect if boost kthread prio is too low
  rcutorture: Use monotonic timestamp for stall detection
  rcutorture: Make boost test more robust
  rcutorture: Disable RT throttling for boost tests
  rcutorture: Emphasize testing of single reader protection type
  rcutorture: Handle extended read-side critical sections
  rcutorture: Make rcu_torture_timer() use rcu_torture_one_read()
  rcutorture: Use per-CPU random state for rcu_torture_timer()
  rcutorture: Use atomic increment for n_rcu_torture_timers
  rcutorture: Extract common code from rcu_torture_reader()
  rcuperf: Remove unused torturing_tasks() function
  rcu: Remove rcutorture test version and sequence number
  rcutorture: Change units of onoff_interval to jiffies
  rcu: Assign higher prio to RCU threads if rcutorture is built-in
  rculist: Improve documentation for list_for_each_entry_from_rcu()
  srcu: Add grace-period number to rcutorture statistics printout
  rcu: Print stall-warning NMI dyntick state in hexadecimal
  MAINTAINERS: Update RCU, SRCU, and TORTURE-TEST entries
  rcu: Make rcu_seq_diff() more exact
  ...

diff --combined MAINTAINERS
index 544cac8,16b0725..d0d7290
--- 1/MAINTAINERS
--- 2/MAINTAINERS
+++ b/MAINTAINERS
@@@ -2523,7 -2523,7 +2523,7 @@@ S:      Supporte
  F:    drivers/scsi/esas2r
  
  ATUSB IEEE 802.15.4 RADIO DRIVER
 -M:    Stefan Schmidt <stefan@osg.samsung.com>
 +M:    Stefan Schmidt <stefan@datenfreihafen.org>
  L:    linux-wpan@vger.kernel.org
  S:    Maintained
  F:    drivers/net/ieee802154/atusb.c
@@@ -5444,7 -5444,6 +5444,7 @@@ F:      drivers/iommu/exynos-iommu.
  
  EZchip NPS platform support
  M:    Vineet Gupta <vgupta@synopsys.com>
 +M:    Ofer Levi <oferle@mellanox.com>
  S:    Supported
  F:    arch/arc/plat-eznps
  F:    arch/arc/boot/dts/eznps.dts
@@@ -5791,6 -5790,7 +5791,6 @@@ F:      include/linux/fsl
  
  FREESCALE SOC FS_ENET DRIVER
  M:    Pantelis Antoniou <pantelis.antoniou@gmail.com>
 -M:    Vitaly Bordug <vbordug@ru.mvista.com>
  L:    linuxppc-dev@lists.ozlabs.org
  L:    netdev@vger.kernel.org
  S:    Maintained
@@@ -5930,7 -5930,7 +5930,7 @@@ F:      Documentation/dev-tools/gcov.rs
  
  GDB KERNEL DEBUGGING HELPER SCRIPTS
  M:    Jan Kiszka <jan.kiszka@siemens.com>
 -M:    Kieran Bingham <kieran@bingham.xyz>
 +M:    Kieran Bingham <kbingham@kernel.org>
  S:    Supported
  F:    scripts/gdb/
  
@@@ -6909,7 -6909,7 +6909,7 @@@ F:      drivers/clk/clk-versaclock5.
  
  IEEE 802.15.4 SUBSYSTEM
  M:    Alexander Aring <alex.aring@gmail.com>
 -M:    Stefan Schmidt <stefan@osg.samsung.com>
 +M:    Stefan Schmidt <stefan@datenfreihafen.org>
  L:    linux-wpan@vger.kernel.org
  W:    http://wpan.cakelab.org/
  T:    git git://git.kernel.org/pub/scm/linux/kernel/git/sschmidt/wpan.git
@@@ -7096,7 -7096,6 +7096,7 @@@ F:      include/uapi/linux/input.
  F:    include/uapi/linux/input-event-codes.h
  F:    include/linux/input/
  F:    Documentation/devicetree/bindings/input/
 +F:    Documentation/devicetree/bindings/serio/
  F:    Documentation/input/
  
  INPUT MULTITOUCH (MT) PROTOCOL
@@@ -7986,7 -7985,7 +7986,7 @@@ F:      lib/test_kmod.
  F:    tools/testing/selftests/kmod/
  
  KPROBES
 -M:    Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com>
 +M:    Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
  M:    Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
  M:    "David S. Miller" <davem@davemloft.net>
  M:    Masami Hiramatsu <mhiramat@kernel.org>
@@@ -8630,7 -8629,7 +8630,7 @@@ MARVELL MWIFIEX WIRELESS DRIVE
  M:    Amitkumar Karwar <amitkarwar@gmail.com>
  M:    Nishant Sarmukadam <nishants@marvell.com>
  M:    Ganapathi Bhat <gbhat@marvell.com>
 -M:    Xinming Hu <huxm@marvell.com>
 +M:    Xinming Hu <huxinming820@gmail.com>
  L:    linux-wireless@vger.kernel.org
  S:    Maintained
  F:    drivers/net/wireless/marvell/mwifiex/
@@@ -9076,7 -9075,7 +9076,7 @@@ S:      Maintaine
  F:    drivers/usb/mtu3/
  
  MEGACHIPS STDPXXXX-GE-B850V3-FW LVDS/DP++ BRIDGES
 -M:    Peter Senna Tschudin <peter.senna@collabora.com>
 +M:    Peter Senna Tschudin <peter.senna@gmail.com>
  M:    Martin Donnelly <martin.donnelly@ge.com>
  M:    Martyn Welch <martyn.welch@collabora.co.uk>
  S:    Maintained
@@@ -12039,9 -12038,9 +12039,9 @@@ T:   git git://git.kernel.org/pub/scm/lin
  F:    Documentation/RCU/
  X:    Documentation/RCU/torture.txt
  F:    include/linux/rcu*
- X:    include/linux/srcu.h
+ X:    include/linux/srcu*.h
  F:    kernel/rcu/
- X:    kernel/torture.c
+ X:    kernel/rcu/srcu*.c
  
  REAL TIME CLOCK (RTC) SUBSYSTEM
  M:    Alessandro Zummo <a.zummo@towertech.it>
@@@ -13078,8 -13077,8 +13078,8 @@@ L:   linux-kernel@vger.kernel.or
  W:    http://www.rdrop.com/users/paulmck/RCU/
  S:    Supported
  T:    git git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git
- F:    include/linux/srcu.h
- F:    kernel/rcu/srcu.c
+ F:    include/linux/srcu*.h
+ F:    kernel/rcu/srcu*.c
  
  SERIAL LOW-POWER INTER-CHIP MEDIA BUS (SLIMbus)
  M:    Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
@@@ -14438,6 -14437,7 +14438,7 @@@ T:   git git://git.kernel.org/pub/scm/lin
  F:    Documentation/RCU/torture.txt
  F:    kernel/torture.c
  F:    kernel/rcu/rcutorture.c
+ F:    kernel/rcu/rcuperf.c
  F:    kernel/locking/locktorture.c
  
  TOSHIBA ACPI EXTRAS DRIVER