linux-kernel - Re: [PATCH] Coresight: tpda/tpdm: remove incorrect _

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Date:   Thu, 26 Jan 2023 21:37:29 +0100
From:   "Arnd Bergmann" <arnd@...db.de>
To:     "Suzuki K Poulose" <suzuki.poulose@....com>,
        "Arnd Bergmann" <arnd@...nel.org>,
        "Mathieu Poirier" <mathieu.poirier@...aro.org>,
        "Alexander Shishkin" <alexander.shishkin@...ux.intel.com>,
        "Tao Zhang" <quic_taozha@...cinc.com>,
        "Mao Jinlong" <quic_jinlmao@...cinc.com>
Cc:     "Mike Leach" <mike.leach@...aro.org>,
        "Leo Yan" <leo.yan@...aro.org>, coresight@...ts.linaro.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Coresight: tpda/tpdm: remove incorrect __exit annotation

On Thu, Jan 26, 2023, at 19:02, Suzuki K Poulose wrote:
> On 26/01/2023 16:35, Arnd Bergmann wrote:
>> From: Arnd Bergmann <arnd@...db.de>
> Thanks for the fix, I will queue this. Btw, I did try to
> reproduce it locally, but couldn't trigger the warnings,
> even with
>
> CONFIG_WERROR=y
>
> and all CORESIGHT configs builtin. I see other drivers doing the
> same outside coresight too. Just curious to know why is this
> any different. Is it specific to "bus" driver (e.g. AMBA) ?

The warning comes from postprocessing the object file, it's got
nothing to do with the bus type, only with a symbol in .data
referencing a symbol in .init.text. Maybe there are some
config options that keep the section from getting discarded?
Or possibly you only built the files in this directory, but did
not get to the final link?

      Arnd