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

Pull RCU fix from Paul E. McKenney:

 "This additional v4.18 pull request contains a single commit that fell
  through the cracks:

      Provide early rcu_cpu_starting() callback for the benefit of the
      x86/mtrr code, which needs RCU to be available on incoming CPUs
      earlier than has been the case in the past."

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