From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_NEOMUTT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BEF4FC10F0E for ; Thu, 18 Apr 2019 13:57:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 99A852083D for ; Thu, 18 Apr 2019 13:57:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388940AbfDRN5d (ORCPT ); Thu, 18 Apr 2019 09:57:33 -0400 Received: from mx1.redhat.com ([209.132.183.28]:35034 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729331AbfDRN5d (ORCPT ); Thu, 18 Apr 2019 09:57:33 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 097C26696F; Thu, 18 Apr 2019 13:57:32 +0000 (UTC) Received: from treble (ovpn-124-190.rdu2.redhat.com [10.10.124.190]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 4F70A5C205; Thu, 18 Apr 2019 13:57:23 +0000 (UTC) Date: Thu, 18 Apr 2019 08:57:21 -0500 From: Josh Poimboeuf To: Thomas Gleixner Cc: LKML , x86@kernel.org, Andy Lutomirski , Steven Rostedt , Alexander Potapenko , Alexey Dobriyan , Andrew Morton , Pekka Enberg , linux-mm@kvack.org, David Rientjes , Christoph Lameter , Catalin Marinas , Dmitry Vyukov , Andrey Ryabinin , kasan-dev@googlegroups.com, Mike Rapoport , Akinobu Mita , iommu@lists.linux-foundation.org, Robin Murphy , Christoph Hellwig , Marek Szyprowski , Johannes Thumshirn , David Sterba , Chris Mason , Josef Bacik , linux-btrfs@vger.kernel.org, dm-devel@redhat.com, Mike Snitzer , Alasdair Kergon , intel-gfx@lists.freedesktop.org, Joonas Lahtinen , Maarten Lankhorst , dri-devel@lists.freedesktop.org, David Airlie , Jani Nikula , Daniel Vetter , Rodrigo Vivi , linux-arch@vger.kernel.org Subject: Re: [patch V2 01/29] tracing: Cleanup stack trace code Message-ID: <20190418135721.5vwd6ngxagrrrrtt@treble> References: <20190418084119.056416939@linutronix.de> <20190418084253.142712304@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20190418084253.142712304@linutronix.de> User-Agent: NeoMutt/20180716 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.38]); Thu, 18 Apr 2019 13:57:32 +0000 (UTC) Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org 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