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Date:   Mon, 8 Jul 2019 11:09:20 +0200
From:   Ingo Molnar <mingo@...nel.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org,
        "Paul E. McKenney" <paulmck@...ibm.com>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Thomas Gleixner <tglx@...utronix.de>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: [GIT PULL] RCU changes for v5.3

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: 83086d654dd08c0f57381522e6819f421677706e Merge branch 'for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu

The changes in this cycle are:

 - RCU flavor consolidation cleanups and optmizations
 - Documentation updates
 - Miscellaneous fixes
 - SRCU updates
 - RCU-sync flavor consolidation
 - Torture-test updates
 - Linux-kernel memory-consistency-model updates, most notably the addition of plain C-language accesses

 Thanks,

	Ingo

------------------>
Alan Stern (7):
      tools/memory-model: Prepare for data-race detection
      tools/memory-model: Add definitions of plain and marked accesses
      tools/memory-model: Add data-race detection
      Documentation: atomic_t.txt: Explain ordering provided by smp_mb__{before,after}_atomic()
      tools/memory-model: Expand definition of barrier
      tools/memory-model: Change definition of rcu-fence
      tools/memory-model: Improve data-race detection

Andrea Parri (3):
      rcu: Don't return a value from rcu_assign_pointer()
      tools/memory-model: Fix comment in MP+poonceonces.litmus
      tools/memory-model: Do not use "herd" to refer to "herd7"

Jiang Biao (2):
      rcu: Remove unused rdp local from synchronize_rcu_expedited()
      rcu: Make __call_srcu static

Joel Fernandes (Google) (7):
      lockdep: Add assertion to check if in an interrupt
      rcu: Add checks for dynticks counters in rcu_is_cpu_rrupt_from_idle()
      doc/rcuref: Document real world examples in kernel
      srcu: Remove unused vmlinux srcu linker entries
      module: Make srcu_struct ptr array as read-only
      rcutorture: Select from only online CPUs
      rcutorture: Add cpu0 to the set of CPUs to add jitter

Neeraj Upadhyay (2):
      rcu: Dump specified number of blocked tasks
      rcu: Correctly unlock root node in rcu_check_gp_start_stall()

Oleg Nesterov (4):
      rcu/sync: Kill rcu_sync_type/gp_type
      uprobes: Use DEFINE_STATIC_PERCPU_RWSEM() to initialize dup_mmap_sem
      locking/percpu-rwsem: Add DEFINE_PERCPU_RWSEM(), use it to initialize cgroup_threadgroup_rwsem
      rcu/sync: Simplify the state machine

Paul E. McKenney (32):
      rcu: Check for wakeup-safe conditions in rcu_read_unlock_special()
      rcu: Only do rcu_read_unlock_special() wakeups if expedited
      rcu: Allow rcu_read_unlock_special() to raise_softirq() if in_irq()
      rcu: Use irq_work to get scheduler's attention in clean context
      rcu: Inline invoke_rcu_callbacks() into its sole remaining caller
      rcu: Avoid self-IPI in sync_rcu_exp_select_node_cpus()
      rcu: Avoid self-IPI in sync_sched_exp_online_cleanup()
      rcu: Rename rcu_data's ->deferred_qs to ->exp_deferred_qs
      rcu: Make kfree_rcu() ignore NULL pointers
      rcu: Set a maximum limit for back-to-back callback invocation
      doc: Remove ".vnet" from paulmck email addresses
      srcu: Allocate per-CPU data for DEFINE_SRCU() in modules
      rcutorture: Add cond_resched() to forward-progress free-up loop
      rcutorture: Fix stutter_wait() return value and freelist checks
      torture: Allow inter-stutter interval to be specified
      torture: Make kvm-find-errors.sh and kvm-recheck.sh provide exit status
      rcutorture: Provide rudimentary Makefile
      rcutorture: Exempt tasks RCU from timely draining of grace periods
      rcutorture: Exempt TREE01 from forward-progress testing
      rcutorture: Give the scheduler a chance on PREEMPT && NO_HZ_FULL kernels
      rcutorture: Halt forward-progress checks at end of run
      rcutorture: Add trivial RCU implementation
      torture: Capture qemu output
      torture: Add function graph-tracing cheat sheet
      torture: Run kernel build in source directory
      torture: Make --cpus override idleness calculations
      torture: Add --trust-make to suppress "make clean"
      rcutorture: Dump trace buffer for callback pipe drain failures
      torture: Suppress propagating trace_printk() warning
      rcutorture: Upper case solves the case of the vanishing NULL pointer
      rcu: Upgrade sync_exp_work_done() to smp_mb()
      rcu: Fix irritating whitespace error in rcu_assign_pointer()

Sebastian Andrzej Siewior (2):
      rcu: Enable elimination of Tree-RCU softirq processing
      rcutorture: Tweak kvm options

Waiman Long (1):
      rcu: Force inlining of rcu_read_lock()

Zhenzhong Duan (1):
      doc: Fixup definition of rcupdate.rcu_task_stall_timeout


 Documentation/RCU/rcuref.txt                       |  21 +-
 Documentation/RCU/stallwarn.txt                    |   2 +-
 Documentation/RCU/whatisRCU.txt                    |   8 +-
 Documentation/admin-guide/kernel-parameters.txt    |   6 +
 Documentation/atomic_t.txt                         |  17 +-
 Documentation/core-api/circular-buffers.rst        |   2 +-
 Documentation/memory-barriers.txt                  |   2 +-
 .../translations/ko_KR/memory-barriers.txt         |   2 +-
 include/linux/lockdep.h                            |   7 +
 include/linux/module.h                             |   5 +
 include/linux/percpu-rwsem.h                       |  10 +-
 include/linux/rcu_sync.h                           |  40 ++--
 include/linux/rcupdate.h                           |  21 +-
 include/linux/sched.h                              |   2 +-
 include/linux/srcutree.h                           |  14 +-
 include/linux/torture.h                            |   2 +-
 kernel/cgroup/cgroup.c                             |   3 +-
 kernel/events/uprobes.c                            |   4 +-
 kernel/locking/locktorture.c                       |   2 +-
 kernel/locking/percpu-rwsem.c                      |   2 +-
 kernel/module.c                                    |   5 +
 kernel/rcu/rcu.h                                   |   5 +
 kernel/rcu/rcutorture.c                            |  96 +++++++--
 kernel/rcu/srcutree.c                              |  69 ++++++-
 kernel/rcu/sync.c                                  | 214 ++++++++++-----------
 kernel/rcu/tree.c                                  | 164 +++++++++++++---
 kernel/rcu/tree.h                                  |   6 +-
 kernel/rcu/tree_exp.h                              |  53 +++--
 kernel/rcu/tree_plugin.h                           | 195 ++++++-------------
 kernel/rcu/tree_stall.h                            |   4 +-
 kernel/rcu/update.c                                |  13 ++
 kernel/torture.c                                   |  23 ++-
 tools/include/linux/rcu.h                          |   4 +-
 tools/memory-model/linux-kernel.bell               |   6 +
 tools/memory-model/linux-kernel.cat                | 102 +++++++---
 tools/memory-model/linux-kernel.def                |   1 +
 .../litmus-tests/MP+poonceonces.litmus             |   2 +-
 tools/memory-model/litmus-tests/README             |   2 +-
 tools/memory-model/lock.cat                        |   2 +-
 tools/memory-model/scripts/README                  |   4 +-
 tools/memory-model/scripts/checkalllitmus.sh       |   2 +-
 tools/memory-model/scripts/checklitmus.sh          |   2 +-
 tools/memory-model/scripts/parseargs.sh            |   2 +-
 tools/memory-model/scripts/runlitmushist.sh        |   2 +-
 tools/testing/radix-tree/linux/rcupdate.h          |   2 +-
 tools/testing/selftests/rcutorture/Makefile        |   3 +
 .../testing/selftests/rcutorture/bin/configinit.sh |  39 ++--
 tools/testing/selftests/rcutorture/bin/cpus2use.sh |   5 +
 .../testing/selftests/rcutorture/bin/functions.sh  |  13 +-
 tools/testing/selftests/rcutorture/bin/jitter.sh   |  13 +-
 .../testing/selftests/rcutorture/bin/kvm-build.sh  |   9 +-
 .../selftests/rcutorture/bin/kvm-find-errors.sh    |   3 +
 .../selftests/rcutorture/bin/kvm-recheck.sh        |  13 +-
 .../selftests/rcutorture/bin/kvm-test-1-run.sh     |  23 +--
 tools/testing/selftests/rcutorture/bin/kvm.sh      |  14 +-
 .../selftests/rcutorture/bin/parse-build.sh        |   2 +-
 .../selftests/rcutorture/bin/parse-console.sh      |   1 +
 .../selftests/rcutorture/configs/rcu/CFcommon      |   3 +
 .../selftests/rcutorture/configs/rcu/TREE01.boot   |   1 +
 .../selftests/rcutorture/configs/rcu/TRIVIAL       |  14 ++
 .../selftests/rcutorture/configs/rcu/TRIVIAL.boot  |   3 +
 61 files changed, 845 insertions(+), 466 deletions(-)
 create mode 100644 tools/testing/selftests/rcutorture/Makefile
 create mode 100644 tools/testing/selftests/rcutorture/configs/rcu/TRIVIAL
 create mode 100644 tools/testing/selftests/rcutorture/configs/rcu/TRIVIAL.boot

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