Re: [patch V2 01/29] tracing: Cleanup stack trace code

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On Thu, Apr 18, 2019 at 10:41:20AM +0200, Thomas Gleixner wrote:
> - Remove the extra array member of stack_dump_trace[]. It's not required as
>   the stack tracer stores at max array size - 1 entries so there is still
>   an empty slot.

What is the empty slot used for?

-- 
Josh
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