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Date: Wed, 29 Mar 2017 23:18:58 +0200 From: "Rafael J. Wysocki" <rjw@...ysocki.net> To: Viresh Kumar <viresh.kumar@...aro.org> Cc: Ingo Molnar <mingo@...hat.com>, Peter Zijlstra <peterz@...radead.org>, linaro-kernel@...ts.linaro.org, linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org, Vincent Guittot <vincent.guittot@...aro.org>, smuckle.linux@...il.com, juri.lelli@....com, Morten.Rasmussen@....com, patrick.bellasi@....com, eas-dev@...ts.linaro.org Subject: Re: [RFC 1/9] sched: cpufreq: add cpu to update_util_data On Thursday, March 09, 2017 05:15:11 PM Viresh Kumar wrote: > From: Steve Muckle <smuckle.linux@...il.com> > > Upcoming support for scheduler cpufreq callbacks on remote wakeups > will require the client to know what the target CPU is that the > callback is being invoked for. Add this information into the callback > data structure. > > Signed-off-by: Steve Muckle <smuckle.linux@...il.com> > Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org> > --- > include/linux/sched/cpufreq.h | 1 + > kernel/sched/cpufreq.c | 1 + > 2 files changed, 2 insertions(+) > > diff --git a/include/linux/sched/cpufreq.h b/include/linux/sched/cpufreq.h > index d2be2ccbb372..f798f63d93e8 100644 > --- a/include/linux/sched/cpufreq.h > +++ b/include/linux/sched/cpufreq.h > @@ -16,6 +16,7 @@ > #ifdef CONFIG_CPU_FREQ > struct update_util_data { > void (*func)(struct update_util_data *data, u64 time, unsigned int flags); > + int cpu; unsigned int? > }; > > void cpufreq_add_update_util_hook(int cpu, struct update_util_data *data, > diff --git a/kernel/sched/cpufreq.c b/kernel/sched/cpufreq.c > index dbc51442ecbc..ee4c596b71b4 100644 > --- a/kernel/sched/cpufreq.c > +++ b/kernel/sched/cpufreq.c > @@ -42,6 +42,7 @@ void cpufreq_add_update_util_hook(int cpu, struct update_util_data *data, > return; > > data->func = func; > + data->cpu = cpu; But I'm not convinced that this helps at all. > rcu_assign_pointer(per_cpu(cpufreq_update_util_data, cpu), data); > } > EXPORT_SYMBOL_GPL(cpufreq_add_update_util_hook); > Thanks, Rafael
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