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Subject: Re: [PATCH v2] sched/uclamp: Fix overzealous type replacement
To:     Vincent Guittot <vincent.guittot@linaro.org>
Cc:     linux-kernel <linux-kernel@vger.kernel.org>,
        Ingo Molnar <mingo@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Dietmar Eggemann <Dietmar.Eggemann@arm.com>,
        Tejun Heo <tj@kernel.org>,
        Patrick Bellasi <patrick.bellasi@matbug.net>,
        Suren Baghdasaryan <surenb@google.com>,
        Quentin Perret <qperret@google.com>,
        Qais Yousef <qais.yousef@arm.com>
References: <20191115103908.27610-1-valentin.schneider@arm.com>
 <CAKfTPtBoi_5sUiGrTpYuV_u2vPkBK+caUzgaKxY3Ck3PKJXZiw@mail.gmail.com>
From:   Valentin Schneider <valentin.schneider@arm.com>
Message-ID: <f4fcc45e-7609-3836-162a-0a1839134bcf@arm.com>
Date:   Fri, 15 Nov 2019 14:29:44 +0000
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On 15/11/2019 14:07, Vincent Guittot wrote:
>> -static inline enum uclamp_id uclamp_none(enum uclamp_id clamp_id)
>> +static inline unsigned int uclamp_none(enum uclamp_id clamp_id)
> 
> Out of curiosity why uclamp decided to use unsigned int to manipulate
> utilization instead of unsigned long which is the type of util_avg ?
> 

I didn't stare at the discussion much, but I think it stems from the
design choices behind struct uclamp_se: everything is crammed in an unsigned
int bitfield. Let me see if I can find some relevant mails.