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Message-ID: <CAPDyKFp-CRiUJq-kS5GqguncaEJE7wBsTHy_orQO_rmS-xzgBA@mail.gmail.com>
Date:   Wed, 16 May 2018 10:57:06 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Russell King - ARM Linux <linux@...linux.org.uk>,
        Kim Phillips <kim.phillips@....com>
Cc:     Mathieu Poirier <mathieu.poirier@...aro.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Alex Williamson <alex.williamson@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        David Howells <dhowells@...hat.com>,
        Eric Auger <eric.auger@...hat.com>,
        Eric Biederman <ebiederm@...ssion.com>,
        Gargi Sharma <gs051095@...il.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Kefeng Wang <wangkefeng.wang@...wei.com>,
        Kirill Tkhai <ktkhai@...tuozzo.com>,
        Mike Rapoport <rppt@...ux.vnet.ibm.com>,
        Oleg Nesterov <oleg@...hat.com>,
        Pavel Tatashin <pasha.tatashin@...cle.com>,
        Rik van Riel <riel@...hat.com>,
        Robin Murphy <robin.murphy@....com>,
        Thierry Reding <treding@...dia.com>,
        Todd Kjos <tkjos@...gle.com>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/4] amba: Export amba_bustype

On 15 May 2018 at 15:41, Russell King - ARM Linux <linux@...linux.org.uk> wrote:
> On Tue, May 15, 2018 at 08:59:02AM +0200, Ulf Hansson wrote:
>> On 8 May 2018 at 21:06, Kim Phillips <kim.phillips@....com> wrote:
>> > This patch is provided in the context of allowing the Coresight driver
>> > subsystem to be loaded as modules.  Coresight uses amba_bus in its call
>> > to bus_find_device() in of_coresight_get_endpoint_device() when
>> > searching for a configurable endpoint device.  This patch allows
>> > Coresight to reference amba_bustype when built as a module.
>>
>> Sounds like you are fixing a bug, don't your want this to go for
>> stable and then also add a fixes tag?
>
> What bug is this fixing exactly that would qualify it for stable
> backporting?

That was my question, as when reading the changelog of $subject patch,
this isn't clear to me.

>
> The lack of an export is never a bug unless there is some existing
> user which requires it.  This is not the case here.
>
> What Kim is doing in his new patch series is making Coresight - which
> is currently only available as either disabled or built-in - possible
> to be loaded as a module.  This is a new feature, and in the process
> of creating this new feature, Kim needs a symbol that wasn't previously
> needed to be exported.

Thanks for clarifying, I did not review the entire series. The change
make perfect sense, no objections - and of course I agree it's not a
bug fix.

[...]

Kind regards
Uffe

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