linux-kernel - Re: [PATCH] rtc: isl12057: remove unused variables

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Date:	Tue, 12 Jul 2016 09:14:00 +0200
From:	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Alessandro Zummo <a.zummo@...ertech.it>,
	Javier Martinez Canillas <javier@....samsung.com>,
	Sudeep Holla <Sudeep.Holla@....com>,
	Uwe Kleine-König <uwe@...ine-koenig.org>,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	rtc-linux@...glegroups.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] rtc: isl12057: remove unused variables

Hi Arnd,

On 11/07/2016 at 23:42:57 +0200, Arnd Bergmann wrote :
> A cleanup patch introduced a harmless warning about now unused local variables:
> 
> drivers/rtc/rtc-isl12057.c: In function 'isl12057_rtc_read_alarm':
> drivers/rtc/rtc-isl12057.c:249:26: error: unused variable 'alarm_secs' [-Werror=unused-variable]
>   unsigned long rtc_secs, alarm_secs;
>                           ^~~~~~~~~~
> drivers/rtc/rtc-isl12057.c:249:16: error: unused variable 'rtc_secs' [-Werror=unused-variable]
>   unsigned long rtc_secs, alarm_secs;
>                 ^~~~~~~~
> drivers/rtc/rtc-isl12057.c:248:18: error: unused variable 'rtc_tm' [-Werror=unused-variable]
>   struct rtc_time rtc_tm, *alarm_tm = &alarm->time;
>                   ^~~~~~
> 
> This removes the variables to shut up those warnings.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> Fixes: 4e30a585a343 ("rtc: isl12057: let the rtc core interpret the partial alarm")

I actually fixed it up in the patch yesterday.

> ---
>  drivers/rtc/rtc-isl12057.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/rtc/rtc-isl12057.c b/drivers/rtc/rtc-isl12057.c
> index e0245fc6205e..0e7f0f52bfe4 100644
> --- a/drivers/rtc/rtc-isl12057.c
> +++ b/drivers/rtc/rtc-isl12057.c
> @@ -245,8 +245,7 @@ static int isl12057_rtc_update_alarm(struct device *dev, int enable)
>  static int isl12057_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
>  {
>  	struct isl12057_rtc_data *data = dev_get_drvdata(dev);
> -	struct rtc_time rtc_tm, *alarm_tm = &alarm->time;
> -	unsigned long rtc_secs, alarm_secs;
> +	struct rtc_time *alarm_tm = &alarm->time;
>  	u8 regs[ISL12057_A1_SEC_LEN];
>  	unsigned int ir;
>  	int ret;
> -- 
> 2.9.0
> 

-- 
Alexandre Belloni, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com