linux-kernel - Re: [patch V2 14/29] dm bufio: Simplify stack trace retrieval

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Date:   Thu, 18 Apr 2019 13:54:37 +0200 (CEST)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Alexander Potapenko <glider@...gle.com>
cc:     LKML <linux-kernel@...r.kernel.org>,
        Josh Poimboeuf <jpoimboe@...hat.com>, x86@...nel.org,
        Andy Lutomirski <luto@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>, dm-devel@...hat.com,
        Mike Snitzer <snitzer@...hat.com>,
        Alasdair Kergon <agk@...hat.com>,
        Alexey Dobriyan <adobriyan@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Pekka Enberg <penberg@...nel.org>,
        Linux Memory Management List <linux-mm@...ck.org>,
        David Rientjes <rientjes@...gle.com>,
        Christoph Lameter <cl@...ux.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>,
        kasan-dev <kasan-dev@...glegroups.com>,
        Mike Rapoport <rppt@...ux.vnet.ibm.com>,
        Akinobu Mita <akinobu.mita@...il.com>,
        iommu@...ts.linux-foundation.org,
        Robin Murphy <robin.murphy@....com>,
        Christoph Hellwig <hch@....de>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Johannes Thumshirn <jthumshirn@...e.de>,
        David Sterba <dsterba@...e.com>, Chris Mason <clm@...com>,
        Josef Bacik <josef@...icpanda.com>,
        linux-btrfs@...r.kernel.org, intel-gfx@...ts.freedesktop.org,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        dri-devel@...ts.freedesktop.org, David Airlie <airlied@...ux.ie>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        linux-arch@...r.kernel.org
Subject: Re: [patch V2 14/29] dm bufio: Simplify stack trace retrieval

On Thu, 18 Apr 2019, Alexander Potapenko wrote:
> On Thu, Apr 18, 2019 at 11:06 AM Thomas Gleixner <tglx@...utronix.de> 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