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

Pull RCU updates from Ingo Molnar:
 "The main RCU changes in this cycle are:

   - the combination of tree geometry-initialization simplifications and
     OS-jitter-reduction changes to expedited grace periods.  These two
     are stacked due to the large number of conflicts that would
     otherwise result.

   - privatize smp_mb__after_unlock_lock().

     This commit moves the definition of smp_mb__after_unlock_lock() to
     kernel/rcu/tree.h, in recognition of the fact that RCU is the only
     thing using this, that nothing else is likely to use it, and that
     it is likely to go away completely.

   - documentation updates.

   - torture-test updates.

   - misc fixes"

* 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (60 commits)
  rcu,locking: Privatize smp_mb__after_unlock_lock()
  rcu: Silence lockdep false positive for expedited grace periods
  rcu: Don't disable CPU hotplug during OOM notifiers
  scripts: Make checkpatch.pl warn on expedited RCU grace periods
  rcu: Update MAINTAINERS entry
  rcu: Clarify CONFIG_RCU_EQS_DEBUG help text
  rcu: Fix backwards RCU_LOCKDEP_WARN() in synchronize_rcu_tasks()
  rcu: Rename rcu_lockdep_assert() to RCU_LOCKDEP_WARN()
  rcu: Make rcu_is_watching() really notrace
  cpu: Wait for RCU grace periods concurrently
  rcu: Create a synchronize_rcu_mult()
  rcu: Fix obsolete priority-boosting comment
  rcu: Use WRITE_ONCE in RCU_INIT_POINTER
  rcu: Hide RCU_NOCB_CPU behind RCU_EXPERT
  rcu: Add RCU-sched flavors of get-state and cond-sync
  rcu: Add fastpath bypassing funnel locking
  rcu: Rename RCU_GP_DONE_FQS to RCU_GP_DOING_FQS
  rcu: Pull out wait_event*() condition into helper function
  documentation: Describe new expedited stall warnings
  rcu: Add stall warnings to synchronize_sched_expedited()
  ...

1 files changed, 1 insertions, 15 deletions

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index e2894b23efb6..3e0b662cae09 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -1353,20 +1353,6 @@ config RCU_CPU_STALL_TIMEOUT
           RCU grace period persists, additional CPU stall warnings are
           printed at more widely spaced intervals.
 
-config RCU_CPU_STALL_INFO
-        bool "Print additional diagnostics on RCU CPU stall"
-        depends on (TREE_RCU || PREEMPT_RCU) && DEBUG_KERNEL
-        default y
-        help
-          For each stalled CPU that is aware of the current RCU grace
-          period, print out additional per-CPU diagnostic information
-          regarding scheduling-clock ticks, idle state, and,
-          for RCU_FAST_NO_HZ kernels, idle-entry state.
-
-          Say N if you are unsure.
-
-          Say Y if you want to enable such diagnostics.
-
 config RCU_TRACE
         bool "Enable tracing for RCU"
         depends on DEBUG_KERNEL
@@ -1379,7 +1365,7 @@ config RCU_TRACE
           Say N if you are unsure.
 
 config RCU_EQS_DEBUG
-        bool "Use this when adding any sort of NO_HZ support to your arch"
+        bool "Provide debugging asserts for adding NO_HZ support to an arch"
         depends on DEBUG_KERNEL
         help
           This option provides consistency checks in RCU's handling of