linux-kernel - Re: [PATCH 1/2] phy: tegra: xusb: annotate PM functions as __maybe

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Date:   Thu, 22 Apr 2021 09:50:40 +0800
From:   JC Kuo <jckuo@...dia.com>
To:     Arnd Bergmann <arnd@...nel.org>,
        Kishon Vijay Abraham I <kishon@...com>,
        Vinod Koul <vkoul@...nel.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>
CC:     Arnd Bergmann <arnd@...db.de>,
        Chunfeng Yun <chunfeng.yun@...iatek.com>,
        Marc Zyngier <maz@...nel.org>,
        Rikard Falkeborn <rikard.falkeborn@...il.com>,
        <linux-phy@...ts.infradead.org>, <linux-tegra@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] phy: tegra: xusb: annotate PM functions as
 __maybe_unused

Hi Arnd,
Thanks for the fix.

Reviewed-by: JC Kuo <jckuo@...dia.com>

On 4/21/21 9:56 PM, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> Depending on the configuration, there are no references to these
> two helpers:
> 
> drivers/phy/tegra/xusb.c:1286:12: error: 'tegra_xusb_padctl_resume_noirq' defined but not used [-Werror=unused-function]
>  1286 | static int tegra_xusb_padctl_resume_noirq(struct device *dev)
>       |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> drivers/phy/tegra/xusb.c:1276:12: error: 'tegra_xusb_padctl_suspend_noirq' defined but not used [-Werror=unused-function]
> 
> Mark them as __maybe_unused to shut up the warnings without adding
> fragile #ifdefs.
> 
> Fixes: b8bb3d9c9b74 ("phy: tegra: xusb: Add sleepwalk and suspend/resume")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
>  drivers/phy/tegra/xusb.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/phy/tegra/xusb.c b/drivers/phy/tegra/xusb.c
> index 0aadac678191..963de5913e50 100644
> --- a/drivers/phy/tegra/xusb.c
> +++ b/drivers/phy/tegra/xusb.c
> @@ -1273,7 +1273,7 @@ static int tegra_xusb_padctl_remove(struct platform_device *pdev)
>  	return err;
>  }
>  
> -static int tegra_xusb_padctl_suspend_noirq(struct device *dev)
> +static __maybe_unused int tegra_xusb_padctl_suspend_noirq(struct device *dev)
>  {
>  	struct tegra_xusb_padctl *padctl = dev_get_drvdata(dev);
>  
> @@ -1283,7 +1283,7 @@ static int tegra_xusb_padctl_suspend_noirq(struct device *dev)
>  	return 0;
>  }
>  
> -static int tegra_xusb_padctl_resume_noirq(struct device *dev)
> +static __maybe_unused int tegra_xusb_padctl_resume_noirq(struct device *dev)
>  {
>  	struct tegra_xusb_padctl *padctl = dev_get_drvdata(dev);
>  
>