linux-kernel - Re: [PATCH] iio: hid-sensors: avoid unused function warning

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <99075295-c385-f856-bbe0-743858da549a@kernel.org>
Date:   Mon, 29 Aug 2016 19:54:26 +0100
From:   Jonathan Cameron <jic23@...nel.org>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] iio: hid-sensors: avoid unused function warning

On 26/08/16 16:29, Arnd Bergmann wrote:
> A small rework of the PM code in this driver introduced a harmless
> warning when CONFIG_PM_SLEEP is not set:
> 
> drivers/iio/common/hid-sensors/hid-sensor-trigger.c:212:12: error: 'hid_sensor_resume' defined but not used [-Werror=unused-function]
> 
> This removes the #ifdef and instead marks all three PM functions
> as __maybe_unused, which covers all possible cases and is harder
> to get wrong.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> Fixes: 7f6cf7414538 ("iio: hid-sensors: use asynchronous resume")
Applied to the togreg branch of iio.git

Thanks,

Jonathan
> ---
>  drivers/iio/common/hid-sensors/hid-sensor-trigger.c | 9 +++------
>  1 file changed, 3 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/iio/common/hid-sensors/hid-sensor-trigger.c b/drivers/iio/common/hid-sensors/hid-sensor-trigger.c
> index 5264ed6e03e5..a3cce3a38300 100644
> --- a/drivers/iio/common/hid-sensors/hid-sensor-trigger.c
> +++ b/drivers/iio/common/hid-sensors/hid-sensor-trigger.c
> @@ -199,8 +199,7 @@ error_ret:
>  }
>  EXPORT_SYMBOL(hid_sensor_setup_trigger);
>  
> -#ifdef CONFIG_PM
> -static int hid_sensor_suspend(struct device *dev)
> +static int __maybe_unused hid_sensor_suspend(struct device *dev)
>  {
>  	struct platform_device *pdev = to_platform_device(dev);
>  	struct iio_dev *indio_dev = platform_get_drvdata(pdev);
> @@ -209,7 +208,7 @@ static int hid_sensor_suspend(struct device *dev)
>  	return _hid_sensor_power_state(attrb, false);
>  }
>  
> -static int hid_sensor_resume(struct device *dev)
> +static int __maybe_unused hid_sensor_resume(struct device *dev)
>  {
>  	struct platform_device *pdev = to_platform_device(dev);
>  	struct iio_dev *indio_dev = platform_get_drvdata(pdev);
> @@ -218,7 +217,7 @@ static int hid_sensor_resume(struct device *dev)
>  	return 0;
>  }
>  
> -static int hid_sensor_runtime_resume(struct device *dev)
> +static int __maybe_unused hid_sensor_runtime_resume(struct device *dev)
>  {
>  	struct platform_device *pdev = to_platform_device(dev);
>  	struct iio_dev *indio_dev = platform_get_drvdata(pdev);
> @@ -226,8 +225,6 @@ static int hid_sensor_runtime_resume(struct device *dev)
>  	return _hid_sensor_power_state(attrb, true);
>  }
>  
> -#endif
> -
>  const struct dev_pm_ops hid_sensor_pm_ops = {
>  	SET_SYSTEM_SLEEP_PM_OPS(hid_sensor_suspend, hid_sensor_resume)
>  	SET_RUNTIME_PM_OPS(hid_sensor_suspend,
>