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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 E7B75C10F0E for ; Thu, 18 Apr 2019 11:55:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B79E42083D for ; Thu, 18 Apr 2019 11:55:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388891AbfDRLzM (ORCPT ); Thu, 18 Apr 2019 07:55:12 -0400 Received: from Galois.linutronix.de ([146.0.238.70]:35732 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388535AbfDRLzM (ORCPT ); Thu, 18 Apr 2019 07:55:12 -0400 Received: from pd9ef12d2.dip0.t-ipconnect.de ([217.239.18.210] helo=nanos) by Galois.linutronix.de with esmtpsa (TLS1.2:DHE_RSA_AES_256_CBC_SHA256:256) (Exim 4.80) (envelope-from ) id 1hH5ck-00063t-VR; Thu, 18 Apr 2019 13:54:39 +0200 Date: Thu, 18 Apr 2019 13:54:37 +0200 (CEST) From: Thomas Gleixner To: Alexander Potapenko cc: LKML , Josh Poimboeuf , x86@kernel.org, Andy Lutomirski , Steven Rostedt , dm-devel@redhat.com, Mike Snitzer , Alasdair Kergon , Alexey Dobriyan , Andrew Morton , Pekka Enberg , Linux Memory Management List , David Rientjes , Christoph Lameter , Catalin Marinas , Dmitry Vyukov , Andrey Ryabinin , kasan-dev , 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, 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 14/29] dm bufio: Simplify stack trace retrieval In-Reply-To: Message-ID: References: <20190418084119.056416939@linutronix.de> <20190418084254.361284697@linutronix.de> User-Agent: Alpine 2.21 (DEB 202 2017-01-01) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 18 Apr 2019, Alexander Potapenko wrote: > On Thu, Apr 18, 2019 at 11:06 AM Thomas Gleixner wrote: > > - save_stack_trace(&b->stack_trace); > > + b->stack_len = stack_trace_save(b->stack_entries, MAX_STACK, 2); > As noted in one of similar patches before, can we have an inline > comment to indicate what does this "2" stand for? Come on. We have gazillion of functions which take numerical constant arguments. Should we add comments to all of them? Thanks, tglx