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

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To: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Subject: Re: [patch V2 01/29] tracing: Cleanup stack trace code
From: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
Date: Thu, 18 Apr 2019 08:57:21 -0500
Cc: LKML <linux-kernel@xxxxxxxxxxxxxxx>, x86@xxxxxxxxxx, Andy Lutomirski <luto@xxxxxxxxxx>, Steven Rostedt <rostedt@xxxxxxxxxxx>, Alexander Potapenko <glider@xxxxxxxxxx>, Alexey Dobriyan <adobriyan@xxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Pekka Enberg <penberg@xxxxxxxxxx>, linux-mm@xxxxxxxxx, David Rientjes <rientjes@xxxxxxxxxx>, Christoph Lameter <cl@xxxxxxxxx>, Catalin Marinas <catalin.marinas@xxxxxxx>, Dmitry Vyukov <dvyukov@xxxxxxxxxx>, Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>, kasan-dev@xxxxxxxxxxxxxxxx, Mike Rapoport <rppt@xxxxxxxxxxxxxxxxxx>, Akinobu Mita <akinobu.mita@xxxxxxxxx>, iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx, Robin Murphy <robin.murphy@xxxxxxx>, Christoph Hellwig <hch@xxxxxx>, Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>, Johannes Thumshirn <jthumshirn@xxxxxxx>, David Sterba <dsterba@xxxxxxxx>, Chris Mason <clm@xxxxxx>, Josef Bacik <josef@xxxxxxxxxxxxxx>, linux-btrfs@xxxxxxxxxxxxxxx, dm-devel@xxxxxxxxxx, Mike Snitzer <snitzer@xxxxxxxxxx>, Alasdair Kergon <agk@xxxxxxxxxx>, intel-gfx@xxxxxxxxxxxxxxxxxxxxx, Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>, Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>, dri-devel@xxxxxxxxxxxxxxxxxxxxx, David Airlie <airlied@xxxxxxxx>, Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>, Daniel Vetter <daniel@xxxxxxxx>, Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>, linux-arch@xxxxxxxxxxxxxxx
In-reply-to: <20190418084253.142712304@linutronix.de>
References: <20190418084119.056416939@linutronix.de> <20190418084253.142712304@linutronix.de>
User-agent: NeoMutt/20180716

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

Follow-Ups:
- Re: [patch V2 01/29] tracing: Cleanup stack trace code
  - From: Thomas Gleixner

References:
- [patch V2 00/29] stacktrace: Consolidate stack trace usage
  - From: Thomas Gleixner
- [patch V2 01/29] tracing: Cleanup stack trace code
  - From: Thomas Gleixner

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