[GIT PULL] RCU updates for v4.15

[Ingo Molnar]

Linus,

Please pull the latest core-rcu-for-linus git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git core-rcu-for-linus

   # HEAD: 72bc286b81d21404cdfecddf76b64c7163aac764 Merge branch 'for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu

The main changes in this cycle are:

  - Documentation updates
  - RCU CPU stall-warning updates
  - Torture-test updates
  - Miscellaneous fixes

Size wise the biggest updates are to documentation. Excluding documentation the 
diffstat becomes:

 18 files changed, 205 insertions(+), 79 deletions(-)

... and most of the code increase comes from a single commit which expands 
debugging:

  9b9500da8150: rcu: Make RCU CPU stall warnings check for irq-disabled CPUs

 Thanks,

	Ingo

------------------>
Alan Stern (1):
      memory-barriers: Rework multicopy-atomicity section

Guilherme G. Piccoli (1):
      doc: Rewrite confusing statement about memory barriers

Neeraj Upadhyay (1):
      rcu: Fix up pending cbs check in rcu_prepare_for_idle

Paul E. McKenney (18):
      documentation: RCU grace-period memory ordering guarantees
      documentation: Long-running irq handlers can stall RCU grace periods
      documentation: Slow systems can stall RCU grace periods
      documentation: Update RCU CPU stall warning messages
      memory-barriers: Replace uses of "transitive"
      rcu: Create call_rcu_tasks() kthread at boot time
      irq_work: Map irq_work_on_queue() to irq_work_on() in !SMP
      sched: Make resched_cpu() unconditional
      sched,rcu: Make cond_resched() provide RCU quiescent state
      rcu: Make RCU CPU stall warnings check for irq-disabled CPUs
      rcu: Turn off tracing before dumping trace
      rcu: Suppress RCU CPU stall warnings while dumping trace
      rcutorture: Add interrupt-disable capability to stall-warning tests
      rcutorture: Dump writer stack if stalled
      torture: Provide TMPDIR environment variable to specify tmpdir
      rcu: Suppress lockdep false-positive ->boost_mtx complaints
      rcu: Add extended-quiescent-state testing advice
      srcu: Add parameters to SRCU docbook comments

Scott Tsai (1):
      memory-barriers.txt: Fix typo in pairing example

Sebastian Andrzej Siewior (2):
      rcu: Do not include rtmutex_common.h unconditionally
      rcu/segcblist: Include rcupdate.h


 .../Design/Memory-Ordering/Tree-RCU-Diagram.html   |    9 +
 .../Memory-Ordering/Tree-RCU-Memory-Ordering.html  |  707 +++
 .../TreeRCU-callback-invocation.svg                |  486 ++
 .../Memory-Ordering/TreeRCU-callback-registry.svg  |  655 +++
 .../RCU/Design/Memory-Ordering/TreeRCU-dyntick.svg |  700 +++
 .../Design/Memory-Ordering/TreeRCU-gp-cleanup.svg  | 1126 +++++
 .../RCU/Design/Memory-Ordering/TreeRCU-gp-fqs.svg  | 1309 +++++
 .../Design/Memory-Ordering/TreeRCU-gp-init-1.svg   |  656 +++
 .../Design/Memory-Ordering/TreeRCU-gp-init-2.svg   |  656 +++
 .../Design/Memory-Ordering/TreeRCU-gp-init-3.svg   |  632 +++
 .../RCU/Design/Memory-Ordering/TreeRCU-gp.svg      | 5135 ++++++++++++++++++++
 .../RCU/Design/Memory-Ordering/TreeRCU-hotplug.svg |  775 +++
 .../RCU/Design/Memory-Ordering/TreeRCU-qs.svg      | 1095 +++++
 .../RCU/Design/Memory-Ordering/rcu_node-lock.svg   |  229 +
 Documentation/RCU/stallwarn.txt                    |  200 +-
 Documentation/admin-guide/kernel-parameters.txt    |    3 +
 Documentation/memory-barriers.txt                  |  197 +-
 include/linux/irq_work.h                           |    3 -
 kernel/irq_work.c                                  |    9 +-
 kernel/rcu/rcu.h                                   |   21 +-
 kernel/rcu/rcu_segcblist.c                         |    1 +
 kernel/rcu/rcutorture.c                            |   24 +-
 kernel/rcu/tree.c                                  |  159 +-
 kernel/rcu/tree.h                                  |    5 +
 kernel/rcu/tree_plugin.h                           |   14 +-
 kernel/rcu/update.c                                |   25 +-
 kernel/sched/core.c                                |    5 +-
 .../selftests/rcutorture/bin/config_override.sh    |    2 +-
 .../selftests/rcutorture/bin/configcheck.sh        |    2 +-
 .../testing/selftests/rcutorture/bin/configinit.sh |    2 +-
 .../testing/selftests/rcutorture/bin/kvm-build.sh  |    2 +-
 .../selftests/rcutorture/bin/kvm-test-1-run.sh     |    2 +-
 tools/testing/selftests/rcutorture/bin/kvm.sh      |    4 +-
 .../selftests/rcutorture/bin/parse-build.sh        |    2 +-
 .../selftests/rcutorture/bin/parse-torture.sh      |    2 +-
 35 files changed, 14598 insertions(+), 256 deletions(-)
 create mode 100644 Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Diagram.html
 create mode 100644 Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.html
 create mode 100644 Documentation/RCU/Design/Memory-Ordering/TreeRCU-callback-invocation.svg
 create mode 100644 Documentation/RCU/Design/Memory-Ordering/TreeRCU-callback-registry.svg
 create mode 100644 Documentation/RCU/Design/Memory-Ordering/TreeRCU-dyntick.svg
 create mode 100644 Documentation/RCU/Design/Memory-Ordering/TreeRCU-gp-cleanup.svg
 create mode 100644 Documentation/RCU/Design/Memory-Ordering/TreeRCU-gp-fqs.svg
 create mode 100644 Documentation/RCU/Design/Memory-Ordering/TreeRCU-gp-init-1.svg
 create mode 100644 Documentation/RCU/Design/Memory-Ordering/TreeRCU-gp-init-2.svg
 create mode 100644 Documentation/RCU/Design/Memory-Ordering/TreeRCU-gp-init-3.svg
 create mode 100644 Documentation/RCU/Design/Memory-Ordering/TreeRCU-gp.svg
 create mode 100644 Documentation/RCU/Design/Memory-Ordering/TreeRCU-hotplug.svg
 create mode 100644 Documentation/RCU/Design/Memory-Ordering/TreeRCU-qs.svg
 create mode 100644 Documentation/RCU/Design/Memory-Ordering/rcu_node-lock.svg