linux-kernel - Re: [PATCH] power: bq24190_charger: mark PM functions as __maybe

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Date:   Mon, 20 Mar 2017 11:29:25 -0700
From:   Liam Breck <liam@...workimprov.net>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Sebastian Reichel <sre@...nel.org>,
        Tony Lindgren <tony@...mide.com>,
        Mark Greer <mgreer@...malcreek.com>,
        Colin Ian King <colin.king@...onical.com>,
        linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] power: bq24190_charger: mark PM functions as __maybe_unused

On Mon, Mar 20, 2017 at 6:14 AM, Arnd Bergmann <arnd@...db.de> wrote:
> Without CONFIG_PM, we get a harmless warning:
>
> drivers/power/supply/bq24190_charger.c:1514:12: error: 'bq24190_runtime_resume' defined but not used [-Werror=unused-function]
> drivers/power/supply/bq24190_charger.c:1501:12: error: 'bq24190_runtime_suspend' defined but not used [-Werror=unused-function]
>
> To avoid the warning, we can mark all four PM functions as __maybe_unused,
> which also lets us remove the incorrect #ifdef.
>
> Fixes: 3d8090cba638 ("power: bq24190_charger: Check the interrupt status on resume")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

Cool, thx!

Acked-by: Liam Breck <kernel@...workimprov.net>

> ---
>  drivers/power/supply/bq24190_charger.c | 10 ++++------
>  1 file changed, 4 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/power/supply/bq24190_charger.c b/drivers/power/supply/bq24190_charger.c
> index 6d80670586eb..451f2bc05ea5 100644
> --- a/drivers/power/supply/bq24190_charger.c
> +++ b/drivers/power/supply/bq24190_charger.c
> @@ -1498,7 +1498,7 @@ static int bq24190_remove(struct i2c_client *client)
>         return 0;
>  }
>
> -static int bq24190_runtime_suspend(struct device *dev)
> +static __maybe_unused int bq24190_runtime_suspend(struct device *dev)
>  {
>         struct i2c_client *client = to_i2c_client(dev);
>         struct bq24190_dev_info *bdi = i2c_get_clientdata(client);
> @@ -1511,7 +1511,7 @@ static int bq24190_runtime_suspend(struct device *dev)
>         return 0;
>  }
>
> -static int bq24190_runtime_resume(struct device *dev)
> +static __maybe_unused int bq24190_runtime_resume(struct device *dev)
>  {
>         struct i2c_client *client = to_i2c_client(dev);
>         struct bq24190_dev_info *bdi = i2c_get_clientdata(client);
> @@ -1527,8 +1527,7 @@ static int bq24190_runtime_resume(struct device *dev)
>         return 0;
>  }
>
> -#ifdef CONFIG_PM_SLEEP
> -static int bq24190_pm_suspend(struct device *dev)
> +static __maybe_unused int bq24190_pm_suspend(struct device *dev)
>  {
>         struct i2c_client *client = to_i2c_client(dev);
>         struct bq24190_dev_info *bdi = i2c_get_clientdata(client);
> @@ -1550,7 +1549,7 @@ static int bq24190_pm_suspend(struct device *dev)
>         return 0;
>  }
>
> -static int bq24190_pm_resume(struct device *dev)
> +static __maybe_unused int bq24190_pm_resume(struct device *dev)
>  {
>         struct i2c_client *client = to_i2c_client(dev);
>         struct bq24190_dev_info *bdi = i2c_get_clientdata(client);
> @@ -1580,7 +1579,6 @@ static int bq24190_pm_resume(struct device *dev)
>
>         return 0;
>  }
> -#endif
>
>  static const struct dev_pm_ops bq24190_pm_ops = {
>         SET_RUNTIME_PM_OPS(bq24190_runtime_suspend, bq24190_runtime_resume,
> --
> 2.9.0
>