• Linus Torvalds's avatar
    Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · a46d3f9b
    Linus Torvalds authored
    Pull timer updates from Thomas Gleixner:
     "The timer departement presents:
    
       - A rather large rework of the hrtimer infrastructure which
         introduces softirq based hrtimers to replace the spread of
         hrtimer/tasklet combos which force the actual callback execution
         into softirq context. The approach is completely different from the
         initial implementation which you cursed at 10 years ago rightfully.
    
         The softirq based timers have their own queues and there is no
         nasty indirection and list reshuffling in the hard interrupt
         anymore. This comes with conversion of some of the hrtimer/tasklet
         users, the rest and the final removal of that horrible interface
         will come towards the end of the merge window or go through the
         relevant maintainer trees.
    
         Note: The top commit merged the last minute bugfix for the 10 years
         old CPU hotplug bug as I wanted to make sure that I fatfinger the
         merge conflict resolution myself.
    
       - The overhaul of the STM32 clocksource/clockevents driver
    
       - A new driver for the Spreadtrum SC9860 timer
    
       - A new driver dor the Actions Semi S700 timer
    
       - The usual set of fixes and updates all over the place"
    
    * 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (53 commits)
      usb/gadget/NCM: Replace tasklet with softirq hrtimer
      ALSA/dummy: Replace tasklet with softirq hrtimer
      hrtimer: Implement SOFT/HARD clock base selection
      hrtimer: Implement support for softirq based hrtimers
      hrtimer: Prepare handling of hard and softirq based hrtimers
      hrtimer: Add clock bases and hrtimer mode for softirq context
      hrtimer: Use irqsave/irqrestore around __run_hrtimer()
      hrtimer: Factor out __hrtimer_next_event_base()
      hrtimer: Factor out __hrtimer_start_range_ns()
      hrtimer: Remove the 'base' parameter from hrtimer_reprogram()
      hrtimer: Make remote enqueue decision less restrictive
      hrtimer: Unify remote enqueue handling
      hrtimer: Unify hrtimer removal handling
      hrtimer: Make hrtimer_force_reprogramm() unconditionally available
      hrtimer: Make hrtimer_reprogramm() unconditional
      hrtimer: Make hrtimer_cpu_base.next_timer handling unconditional
      hrtimer: Make the remote enqueue check unconditional
      hrtimer: Use accesor functions instead of direct access
      hrtimer: Make the hrtimer_cpu_base::hres_active field unconditional, to simplify the code
      hrtimer: Make room in 'struct hrtimer_cpu_base'
      ...
    a46d3f9b
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