linux-kernel - Re: [PATCH] mmc: sunxi: mark PM functions as __maybe

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Message-ID: <CAPDyKFqe4fPpJLh6d+timZ_w+J0BVZbO61PTacFM=X6BuUP-Yw@mail.gmail.com>
Date:   Mon, 28 May 2018 13:30:21 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Maxime Ripard <maxime.ripard@...tlin.com>,
        Chen-Yu Tsai <wens@...e.org>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mmc: sunxi: mark PM functions as __maybe_unused

On 28 May 2018 at 13:13, Arnd Bergmann <arnd@...db.de> wrote:
> On Mon, May 28, 2018 at 1:04 PM, Ulf Hansson <ulf.hansson@...aro.org> wrote:
>> On 25 May 2018 at 23:07, Arnd Bergmann <arnd@...db.de> wrote:
>>> The newly added runtime-pm functions cause a harmless warning
>>> when CONFIG_PM is disabled:
>>>
>>> drivers/mmc/host/sunxi-mmc.c:1452:12: error: 'sunxi_mmc_runtime_suspend' defined but not used [-Werror=unused-function]
>>>  static int sunxi_mmc_runtime_suspend(struct device *dev)
>>>             ^~~~~~~~~~~~~~~~~~~~~~~~~
>>> drivers/mmc/host/sunxi-mmc.c:1435:12: error: 'sunxi_mmc_runtime_resume' defined but not used [-Werror=unused-function]
>>>  static int sunxi_mmc_runtime_resume(struct device *dev)
>>>
>>> This marks them as __maybe_unused to shut up the warning.
>>
>> Most mmc drivers uses #ifdef CONFIG_PM instead of the __maybe_unused() option.
>>
>> It's not a big deal, but consistency is always good. Would you mind changing?
>
> I'd prefer not to. Most uses of #ifdef CONFIG_PM that get introduced are wrong,
> and cause additional randconfig warnings that I end up having to fix,
> so I always
> do it with __maybe_unused.

Right.

>
> I don't mind if you treat my patch as a bug report and decide to fix
> it differently
> yourself, but you won't get that patch from me ;-)

No, worries then. As stated, it's not a big deal.

Applied for next!

Kind regads
Uffe