linux-kernel - Re: [PATCH 17/49] cpufreq: replace cpumask_weight with cpumask

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Date:   Thu, 10 Feb 2022 21:17:59 -0800
From:   Yury Norov <yury.norov@...il.com>
To:     Viresh Kumar <viresh.kumar@...aro.org>
Cc:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Michał Mirosław <mirq-linux@...e.qmqm.pl>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Peter Zijlstra <peterz@...radead.org>,
        David Laight <David.Laight@...lab.com>,
        Joe Perches <joe@...ches.com>, Dennis Zhou <dennis@...nel.org>,
        Emil Renner Berthing <kernel@...il.dk>,
        Nicholas Piggin <npiggin@...il.com>,
        Matti Vaittinen <matti.vaittinen@...rohmeurope.com>,
        Alexey Klimov <aklimov@...hat.com>,
        linux-kernel@...r.kernel.org, Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Sudeep Holla <sudeep.holla@....com>,
        Cristian Marussi <cristian.marussi@....com>,
        linux-arm-msm@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 17/49] cpufreq: replace cpumask_weight with cpumask_empty
 where appropriate

On Fri, Feb 11, 2022 at 10:00:57AM +0530, Viresh Kumar wrote:
> On 10-02-22, 14:49, Yury Norov wrote:
> > drivers/cpufreq calls cpumask_weight() to check if any bit of a given
> > cpumask is set. We can do it more efficiently with cpumask_empty() because
> > cpumask_empty() stops traversing the cpumask as soon as it finds first set
> > bit, while cpumask_weight() counts all bits unconditionally.
> > 
> > Signed-off-by: Yury Norov <yury.norov@...il.com>
> > Reviewed-by: Sudeep Holla <sudeep.holla@....com> (for SCMI cpufreq driver)
> > ---
> >  drivers/cpufreq/qcom-cpufreq-hw.c | 2 +-
> >  drivers/cpufreq/scmi-cpufreq.c    | 2 +-
> >  2 files changed, 2 insertions(+), 2 deletions(-)
> 
> I already applied it yesterday and replied to you as well. Did I miss
> something ?

It appeared in next today after I prepared this series, that's why it
slipped through. Sorry for that. Please ignore this patch.

Thanks,
Yury