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Date: Thu, 12 May 2022 13:12:36 +0530 From: Viresh Kumar <viresh.kumar@...aro.org> To: "Rafael J. Wysocki" <rjw@...ysocki.net> Cc: Linux PM <linux-pm@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org> Subject: Re: [PATCH v1 3/3] cpufreq: Rearrange locking in cpufreq_remove_dev() On 11-05-22, 17:51, Rafael J. Wysocki wrote: > From: Rafael J. Wysocki <rafael.j.wysocki@...el.com> > > Currently, cpufreq_remove_dev() invokes the ->exit() driver callback > without holding the policy rwsem which is inconsistent with what > happens if ->exit() is invoked directly from cpufreq_offline(). > > It also manipulates the real_cpus mask and removes the CPU device > symlink without holding the policy rwsem, but cpufreq_offline() holds > the rwsem around the modifications thereof. > > For consistency, modify cpufreq_remove_dev() to hold the policy rwsem > until the ->exit() callback has been called (or it has been determined > that it is not necessary to call it). > > Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com> > --- > drivers/cpufreq/cpufreq.c | 21 ++++++++++++++------- > 1 file changed, 14 insertions(+), 7 deletions(-) Acked-by: Viresh Kumar <viresh.kumar@...aro.org> -- viresh
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