linux-kernel - Re: [PATCH v3 4/4] watchdog: iTCO_wdg: Make code more clearly with macro definition

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Message-ID: <YmeNkC8B9glPt2S8@google.com>
Date:   Tue, 26 Apr 2022 14:13:36 +0800
From:   Tzung-Bi Shih <tzungbi@...nel.org>
To:     Liu Xinpeng <liuxp11@...natelecom.cn>
Cc:     wim@...ux-watchdog.org, linux@...ck-us.net,
        linux-watchdog@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 4/4] watchdog: iTCO_wdg: Make code more clearly with
 macro definition

On Tue, Apr 26, 2022 at 11:35:20AM +0800, Liu Xinpeng wrote:
> @@ -596,7 +596,6 @@ static int iTCO_wdt_probe(struct platform_device *pdev)
>  	return 0;
>  }
>  
> -#ifdef CONFIG_PM_SLEEP
>  /*
>   * Suspend-to-idle requires this, because it stops the ticks and timekeeping, so
>   * the watchdog cannot be pinged while in that state.  In ACPI sleep states the
> @@ -637,20 +636,15 @@ static int iTCO_wdt_resume_noirq(struct device *dev)
>  }
>  
>  static const struct dev_pm_ops iTCO_wdt_pm = {
> -	.suspend_noirq = iTCO_wdt_suspend_noirq,
> -	.resume_noirq = iTCO_wdt_resume_noirq,
> +	SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(iTCO_wdt_suspend_noirq,
> +				      iTCO_wdt_resume_noirq)

Thus, iTCO_wdt_suspend_noirq and iTCO_wdt_resume_noirq are possible unused.
Put __maybe_unused attribute to them.