Merge branch 'for-5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu

Merge branch 'for-5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu

Pull percpu updates from Dennis Zhou:
 "This has a change to fix percpu-refcount for RT kernels because
  rcu-sched disables preemption and the refcount release callback might
  acquire a spinlock"

* 'for-5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu:
  Revert "percpu: add __percpu to SHIFT_PERCPU_PTR"
  percpu-refcount: Use normal instead of RCU-sched"
  percpu: add __percpu to SHIFT_PERCPU_PTR