Pull locking fixes from Ingo Molnar:
 "The main change is the uninlining of large refcount_t APIs, plus a
  header dependency fix.

  Note that the uninlining allowed us to enable the underflow/overflow
  warnings unconditionally and remove the debug Kconfig switch: this
  might trigger new warnings in buggy code and turn
  crashes/use-after-free bugs into less harmful memory leaks"

* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  locking/refcounts: Add missing kernel.h header to have UINT_MAX defined
  locking/refcounts: Out-of-line everything