linux-kernel - Re: [PATCH v4 14/14] coresight: allow the coresight core driver to be built as a module

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Date:   Wed, 6 Jun 2018 10:57:41 +0100
From:   Suzuki K Poulose <suzuki.poulose@....com>
To:     Kim Phillips <kim.phillips@....com>,
        Mathieu Poirier <mathieu.poirier@...aro.org>
Cc:     Leo Yan <leo.yan@...aro.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.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>,
        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>,
        Russell King <linux@...linux.org.uk>,
        Thierry Reding <treding@...dia.com>,
        Todd Kjos <tkjos@...gle.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 14/14] coresight: allow the coresight core driver to be
 built as a module

On 06/05/2018 10:07 PM, Kim Phillips wrote:
> Allow to build coresight as a module.  This enhances
> coresight developer efficiency by allowing the development to
> take place exclusively on the target, and without needing to
> reboot in between changes.
> 
> - Kconfig becomes a tristate, to allow =m
> - append -core to source file name to allow module to
>    be called coresight by the Makefile
> - modules can have only one init/exit, so we add the core bus
>    register/unregister function calls to the etm_perf init/exit
>    functions, since coresight.c does not have etm_pmu defined.

It feels a bit weird to move the coresight core specific steps to
etm_perf_init. Why not call etm_perf_init from coresight init routine
and keep everything core specific in the coresight-core.c ?


Suzuki