linux-kernel - Re: [PATCH] cpufreq: pxa2xx: fix pxa_cpufreq_change

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Message-ID: <20160125163523.GD3322@vireshk>
Date:	Mon, 25 Jan 2016 22:05:23 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	linux-arm-kernel@...ts.infradead.org,
	Joe Perches <joe@...ches.com>,
	Fabian Frederick <fabf@...net.be>, linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] cpufreq: pxa2xx: fix pxa_cpufreq_change_voltage prototype

On 25-01-16, 16:44, Arnd Bergmann wrote:
> There are two definitions of pxa_cpufreq_change_voltage, with slightly
> different prototypes after one of them had its argument marked 'const'.
> Now the other one (for !CONFIG_REGULATOR) produces a harmless warning:
> 
> drivers/cpufreq/pxa2xx-cpufreq.c: In function 'pxa_set_target':
> drivers/cpufreq/pxa2xx-cpufreq.c:291:36: warning: passing argument 1 of 'pxa_cpufreq_change_voltage' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
>    ret = pxa_cpufreq_change_voltage(&pxa_freq_settings[idx]);
>                                     ^
> drivers/cpufreq/pxa2xx-cpufreq.c:205:12: note: expected 'struct pxa_freqs *' but argument is of type 'const struct pxa_freqs *'
>  static int pxa_cpufreq_change_voltage(struct pxa_freqs *pxa_freq)
>             ^
> 
> This changes the prototype in the same way as the other, which
> avoids the warning.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> Fixes: 03c229906311 ("cpufreq: pxa: make pxa_freqs arrays const")
> ---
>  drivers/cpufreq/pxa2xx-cpufreq.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/cpufreq/pxa2xx-cpufreq.c b/drivers/cpufreq/pxa2xx-cpufreq.c
> index efe3b215fd34..46fee1539cc8 100644
> --- a/drivers/cpufreq/pxa2xx-cpufreq.c
> +++ b/drivers/cpufreq/pxa2xx-cpufreq.c
> @@ -202,7 +202,7 @@ static void __init pxa_cpufreq_init_voltages(void)
>  	}
>  }
>  #else
> -static int pxa_cpufreq_change_voltage(struct pxa_freqs *pxa_freq)
> +static int pxa_cpufreq_change_voltage(const struct pxa_freqs *pxa_freq)
>  {
>  	return 0;
>  }

Acked-by: Viresh Kumar <viresh.kumar@...aro.org>

-- 
viresh