linux-kernel - Re: [PATCH] media: nxp: ignore unused suspend operations

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Message-Id: <6b5f7b17-6365-4791-b6e9-8505acb476f7@app.fastmail.com>
Date:   Tue, 18 Apr 2023 10:09:08 +0200
From:   "Arnd Bergmann" <arnd@...db.de>
To:     "Hans Verkuil" <hverkuil@...all.nl>,
        "Arnd Bergmann" <arnd@...nel.org>,
        "laurent.pinchart" <laurent.pinchart@...asonboard.com>,
        "Mauro Carvalho Chehab" <mchehab@...nel.org>,
        "Shawn Guo" <shawnguo@...nel.org>,
        "Sascha Hauer" <s.hauer@...gutronix.de>,
        "Dong Aisheng" <aisheng.dong@....com>,
        "Guoniu Zhou" <guoniu.zhou@....com>,
        "Stefan Riedmueller" <s.riedmueller@...tec.de>
Cc:     "Pengutronix Kernel Team" <kernel@...gutronix.de>,
        "Fabio Estevam" <festevam@...il.com>,
        "NXP Linux Team" <linux-imx@....com>,
        "Christian Hemp" <c.hemp@...tec.de>,
        "Jacopo Mondi" <jacopo@...ndi.org>, linux-media@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] media: nxp: ignore unused suspend operations

On Tue, Apr 18, 2023, at 10:04, Hans Verkuil wrote:
> On 18/04/2023 09:15, Arnd Bergmann wrote:
>> From: Arnd Bergmann <arnd@...db.de>
>> 
>> gcc warns about some functions being unused when CONFIG_PM is
>> disabled:
>
> ???
>
> The Kconfig has a:
>
>         depends on HAS_DMA && PM
>
> So how can this be compiled with CONFIG_PM not set?
>
> Am I missing something?

My mistake, the warning only shows up when CONFIG_PM_SLEEP is
disabled.

     Arnd