tick: broadcast: Prevent livelock from event handler
With the removal of the hrtimer softirq the switch to highres/nohz mode happens in the tick interrupt. That leads to a livelock when the per cpu event handler is directly called from the broadcast handler under broadcast lock because broadcast lock needs to be taken for the highres/nohz switch as well. Solve this by calling the cpu local handler outside the broadcast_lock held region. Fixes: c6eb3f70 "hrtimer: Get rid of hrtimer softirq" Reported-and-tested-by: NBorislav Petkov <bp@alien8.de> Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
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