From: Quentin Perret <quentin.perret@arm.com>
To: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Matthias Kaehlcke <mka@chromium.org>,
sudeep.holla@arm.com, rjw@rjwysocki.net, nm@ti.com,
sboyd@kernel.org, linux-pm@vger.kernel.org,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, dietmar.eggemann@arm.com
Subject: Re: [PATCH v2 1/5] PM / OPP: Introduce a power estimation helper
Date: Thu, 31 Jan 2019 09:34:21 +0000 [thread overview]
Message-ID: <20190131093418.umsbh4eevgod42sh@queper01-lin> (raw)
In-Reply-To: <20190131072209.nhbgid3cystvr2p5@vireshk-i7>
On Thursday 31 Jan 2019 at 12:52:09 (+0530), Viresh Kumar wrote:
> On 30-01-19, 11:07, Matthias Kaehlcke wrote:
> > On Wed, Jan 30, 2019 at 05:05:02PM +0000, Quentin Perret wrote:
> > > +static int __maybe_unused _get_cpu_power(unsigned long *mW, unsigned long *kHz,
> > > + int cpu)
> >
> > why __maybe_unused?
>
> Yeah, it isn't required I think. He probably added it for the case
> where CONFIG_ENERGY_MODEL=n, but even then an inline routine is
> defined which will accept it as argument and wouldn't do anything with
> it. Had it been a macro, we would have required __maybe_unused but not
> now.
The thing is, the EM_DATA_CB() macro _is_ stubbed for
CONFIG_ENERGY_MODEL=n:
https://elixir.bootlin.com/linux/v5.0-rc4/source/include/linux/energy_model.h#L165
So, without __maybe_unused you get do get a compiler warning.
Thanks,
Quentin
>
> --
> viresh
next prev parent reply other threads:[~2019-01-31 9:34 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-30 17:05 [PATCH v2 0/5] Register an Energy Model for Arm reference platforms Quentin Perret
2019-01-30 17:05 ` [PATCH v2 1/5] PM / OPP: Introduce a power estimation helper Quentin Perret
2019-01-30 19:07 ` Matthias Kaehlcke
2019-01-31 7:22 ` Viresh Kumar
2019-01-31 9:34 ` Quentin Perret [this message]
2019-01-31 9:37 ` Viresh Kumar
2019-01-31 9:42 ` Quentin Perret
2019-01-31 7:26 ` Viresh Kumar
2019-01-31 9:51 ` Quentin Perret
2019-01-30 17:05 ` [PATCH v2 2/5] cpufreq: dt: Register an Energy Model Quentin Perret
2019-01-30 17:05 ` [PATCH v2 3/5] cpufreq: scpi: " Quentin Perret
2019-01-30 17:05 ` [PATCH v2 4/5] cpufreq: arm_big_little: " Quentin Perret
2019-01-30 17:05 ` [PATCH v2 5/5] cpufreq: scmi: " Quentin Perret
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