Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull timer fixes from Thomas Gleixner:
 "Viresh unearthed the following three hickups in the timer/timekeeping
  code:

   - Negated check for the result of a clock event selection

   - A missing early exit in the jiffies update path which causes
     update_wall_time to be called for nothing causing lock contention
     and wasted cycles in the timer interrupt

   - Checking a variable in the NOHZ code enable code for true which can
     only be set by that very code after the check succeeds.  That
     results in a rock solid runtime disablement of that feature"

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  tick-sched: Check tick_nohz_enabled in tick_nohz_switch_to_nohz()
  tick-sched: Don't call update_wall_time() when delta is lesser than tick_period
  tick-common: Fix wrong check in tick_check_replacement()

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