Merge branch 'for-3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu

Pull per-cpu changes from Tejun Heo:
 "This pull request contains Kent's per-cpu reference counter.  It has
  gone through several iterations since the last time and the dynamic
  allocation is gone.

  The usual usage is relatively straight-forward although async kill
  confirm interface, which is not used int most cases, is somewhat icky.
  There also are some interface concerns - e.g.  I'm not sure about
  passing in @relesae callback during init as that becomes funny when we
  later implement synchronous kill_and_drain - but nothing too serious
  and it's quite useable now.

  cgroup_subsys_state refcnting has already been converted and we should
  convert module refcnt (Kent?)"

* 'for-3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu:
  percpu-refcount: use RCU-sched insted of normal RCU
  percpu-refcount: implement percpu_tryget() along with percpu_ref_kill_and_confirm()
  percpu-refcount: implement percpu_ref_cancel_init()
  percpu-refcount: add __must_check to percpu_ref_init() and don't use ACCESS_ONCE() in percpu_ref_kill_rcu()
  percpu-refcount: cosmetic updates
  percpu-refcount: consistently use plain (non-sched) RCU
  percpu-refcount: Don't use silly cmpxchg()
  percpu: implement generic percpu refcounting

lib/Makefile

@@ -13,7 +13,7 @@ lib-y := ctype.o string.o vsprintf.o cmdline.o \
 	 sha1.o md5.o irq_regs.o reciprocal_div.o argv_split.o \
 	 proportions.o flex_proportions.o prio_heap.o ratelimit.o show_mem.o \
 	 is_single_threaded.o plist.o decompress.o kobject_uevent.o \
-	 earlycpio.o
+	 earlycpio.o percpu-refcount.o
 
 obj-$(CONFIG_ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS) += usercopy.o
 lib-$(CONFIG_MMU) += ioremap.o