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

Pull RCU and LKMM changes from Paul E. McKenney:

  - Documentation updates.

  - Miscellaneous fixes.

  - Dynamic tick (nohz) updates, perhaps most notably changes to
    force the tick on when needed due to lengthy in-kernel execution
    on CPUs on which RCU is waiting.

  - Replace rcu_swap_protected() with rcu_prepace_pointer().

  - Torture-test updates.

  - Linux-kernel memory consistency model updates.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

kernel/stop_machine.c

@@ -235,6 +235,7 @@ static int multi_cpu_stop(void *data)
 			 */
 			touch_nmi_watchdog();
 		}
+		rcu_momentary_dyntick_idle();
 	} while (curstate != MULTI_STOP_EXIT);
 
 	local_irq_restore(flags);