linux-kernel - Re: [PATCH 1/2] PM / Runtime: Consolidate code to get active/suspended time

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:   Tue, 12 Mar 2019 10:59:30 +0100
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     "Rafael J. Wysocki" <rjw@...ysocki.net>
Cc:     Linux PM <linux-pm@...r.kernel.org>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] PM / Runtime: Consolidate code to get
 active/suspended time

On Mon, 11 Mar 2019 at 13:03, Rafael J. Wysocki <rjw@...ysocki.net> wrote:
>
> On Tuesday, March 5, 2019 1:55:26 PM CET Ulf Hansson wrote:
> > In a step to consolidate code around fetching the runtime PM active/suspend
> > time for a device, let's re-factor the existing pm_runtime_suspended_time()
> > and add a new corresponding pm_runtime_active_time(). Make the latter
> > shared internally to the PM core, as in following changes it starts making
> > use of it.
> >
> > Signed-off-by: Ulf Hansson <ulf.hansson@...aro.org>
> > ---
> >  drivers/base/power/power.h   |  1 +
> >  drivers/base/power/runtime.c | 14 ++++++++++++--
> >  2 files changed, 13 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/base/power/power.h b/drivers/base/power/power.h
> > index c511def48b48..ec33fbdb919b 100644
> > --- a/drivers/base/power/power.h
> > +++ b/drivers/base/power/power.h
> > @@ -21,6 +21,7 @@ static inline void pm_runtime_early_init(struct device *dev)
> >  extern void pm_runtime_init(struct device *dev);
> >  extern void pm_runtime_reinit(struct device *dev);
> >  extern void pm_runtime_remove(struct device *dev);
> > +extern u64 pm_runtime_active_time(struct device *dev);
> >
> >  #define WAKE_IRQ_DEDICATED_ALLOCATED BIT(0)
> >  #define WAKE_IRQ_DEDICATED_MANAGED   BIT(1)
> > diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
> > index 78937c45278c..d1908fc422cc 100644
> > --- a/drivers/base/power/runtime.c
> > +++ b/drivers/base/power/runtime.c
> > @@ -98,7 +98,7 @@ static void __update_runtime_status(struct device *dev, enum rpm_status status)
> >       dev->power.runtime_status = status;
> >  }
> >
> > -u64 pm_runtime_suspended_time(struct device *dev)
> > +static u64 rpm_account_time(struct device *dev, bool suspend)
> >  {
> >       u64 time;
> >       unsigned long flags;
> > @@ -106,12 +106,22 @@ u64 pm_runtime_suspended_time(struct device *dev)
> >       spin_lock_irqsave(&dev->power.lock, flags);
> >
> >       update_pm_runtime_accounting(dev);
> > -     time = dev->power.suspended_time;
> > +     time = suspend ? dev->power.suspended_time : dev->power.active_time;
> >
> >       spin_unlock_irqrestore(&dev->power.lock, flags);
> >
> >       return time;
> >  }
> > +
> > +u64 pm_runtime_active_time(struct device *dev)
> > +{
> > +     return rpm_account_time(dev, false);
> > +}
> > +
> > +u64 pm_runtime_suspended_time(struct device *dev)
> > +{
> > +     return rpm_account_time(dev, true);
> > +}
> >  EXPORT_SYMBOL_GPL(pm_runtime_suspended_time);
> >
> >  /**
> >
>
> Both [1-2/2] applied with some manual changes (please see linux-next
> tomorrow).
>

Looks good, thanks!

Kind regards
Uffe