linux-kernel - Re: [PATCH v8 06/16] sched/core: uclamp: Extend sched_setattr() to support utilization clamping

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Date:   Wed, 8 May 2019 21:41:07 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Patrick Bellasi <patrick.bellasi@....com>
Cc:     linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-api@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
        Tejun Heo <tj@...nel.org>,
        "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Paul Turner <pjt@...gle.com>,
        Quentin Perret <quentin.perret@....com>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Morten Rasmussen <morten.rasmussen@....com>,
        Juri Lelli <juri.lelli@...hat.com>,
        Todd Kjos <tkjos@...gle.com>,
        Joel Fernandes <joelaf@...gle.com>,
        Steve Muckle <smuckle@...gle.com>,
        Suren Baghdasaryan <surenb@...gle.com>
Subject: Re: [PATCH v8 06/16] sched/core: uclamp: Extend sched_setattr() to
 support utilization clamping

On Tue, Apr 02, 2019 at 11:41:42AM +0100, Patrick Bellasi wrote:
> @@ -1056,6 +1100,13 @@ static void __init init_uclamp(void)
>  #else /* CONFIG_UCLAMP_TASK */
>  static inline void uclamp_rq_inc(struct rq *rq, struct task_struct *p) { }
>  static inline void uclamp_rq_dec(struct rq *rq, struct task_struct *p) { }
> +static inline int uclamp_validate(struct task_struct *p,
> +				  const struct sched_attr *attr)
> +{
> +	return -ENODEV;

Does that maybe want to be -EOPNOTSUPP ?

> +}