linux-kernel - Re: [PATCH 2/2] PM / QoS: unconditionally build the per-device constraints feature

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Message-Id: <201202122227.39949.rjw@sisk.pl>
Date:	Sun, 12 Feb 2012 22:27:39 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	markgross@...gnar.org
Cc:	Jean Pihet <jean.pihet@...oldbits.com>,
	Linux PM mailing list <linux-pm@...ts.linux-foundation.org>,
	linux-kernel@...r.kernel.org,
	Venkatesh Pallipadi <venki@...gle.com>,
	Jean Pihet <j-pihet@...com>
Subject: Re: [PATCH 2/2] PM / QoS: unconditionally build the per-device constraints feature

On Sunday, February 12, 2012, mark gross wrote:
> why are these two patches?
> 
> I think you could squash them into one and it would be just fine.

Well, what sense does _device_ PM QoS make without CONFIG_PM?

Rafael


> On Tue, Feb 07, 2012 at 09:34:06AM +0100, Jean Pihet wrote:
> > The per-device PM QoS feature depends on CONFIG_PM which depends
> > on PM_SLEEP || PM_RUNTIME. This breaks CPU C-states with kernels
> > not having these CONFIGs.
> > 
> > This patch allows the feature in all cases.
> > 
> > Signed-off-by: Jean Pihet <j-pihet@...com>
> > Cc: Rafael J. Wysocki <rjw@...k.pl>
> > Cc: Mark Gross <markgross@...gnar.org>
> > ---
> >  drivers/base/power/Makefile |    3 ++-
> >  include/linux/pm_qos.h      |   39 ---------------------------------------
> >  2 files changed, 2 insertions(+), 40 deletions(-)
> > 
> > diff --git a/drivers/base/power/Makefile b/drivers/base/power/Makefile
> > index 2e58ebb..312eb65 100644
> > --- a/drivers/base/power/Makefile
> > +++ b/drivers/base/power/Makefile
> > @@ -1,4 +1,5 @@
> > -obj-$(CONFIG_PM)	+= sysfs.o generic_ops.o common.o qos.o
> > +obj-y			+= qos.o
> > +obj-$(CONFIG_PM)	+= sysfs.o generic_ops.o common.o
> >  obj-$(CONFIG_PM_SLEEP)	+= main.o wakeup.o
> >  obj-$(CONFIG_PM_RUNTIME)	+= runtime.o
> >  obj-$(CONFIG_PM_TRACE_RTC)	+= trace.o
> > diff --git a/include/linux/pm_qos.h b/include/linux/pm_qos.h
> > index 105be69..37b017a 100644
> > --- a/include/linux/pm_qos.h
> > +++ b/include/linux/pm_qos.h
> > @@ -77,7 +77,6 @@ int pm_qos_remove_notifier(int pm_qos_class, struct notifier_block *notifier);
> >  int pm_qos_request_active(struct pm_qos_request *req);
> >  s32 pm_qos_read_value(struct pm_qos_constraints *c);
> >  
> > -#ifdef CONFIG_PM
> >  s32 __dev_pm_qos_read_value(struct device *dev);
> >  s32 dev_pm_qos_read_value(struct device *dev);
> >  int dev_pm_qos_add_request(struct device *dev, struct dev_pm_qos_request *req,
> > @@ -94,43 +93,5 @@ void dev_pm_qos_constraints_init(struct device *dev);
> >  void dev_pm_qos_constraints_destroy(struct device *dev);
> >  int dev_pm_qos_add_ancestor_request(struct device *dev,
> >  				    struct dev_pm_qos_request *req, s32 value);
> > -#else
> > -static inline s32 __dev_pm_qos_read_value(struct device *dev)
> > -			{ return 0; }
> > -static inline s32 dev_pm_qos_read_value(struct device *dev)
> > -			{ return 0; }
> > -static inline int dev_pm_qos_add_request(struct device *dev,
> > -					 struct dev_pm_qos_request *req,
> > -					 s32 value)
> > -			{ return 0; }
> > -static inline int dev_pm_qos_update_request(struct dev_pm_qos_request *req,
> > -					    s32 new_value)
> > -			{ return 0; }
> > -static inline int dev_pm_qos_remove_request(struct dev_pm_qos_request *req)
> > -			{ return 0; }
> > -static inline int dev_pm_qos_add_notifier(struct device *dev,
> > -					  struct notifier_block *notifier)
> > -			{ return 0; }
> > -static inline int dev_pm_qos_remove_notifier(struct device *dev,
> > -					     struct notifier_block *notifier)
> > -			{ return 0; }
> > -static inline int dev_pm_qos_add_global_notifier(
> > -					struct notifier_block *notifier)
> > -			{ return 0; }
> > -static inline int dev_pm_qos_remove_global_notifier(
> > -					struct notifier_block *notifier)
> > -			{ return 0; }
> > -static inline void dev_pm_qos_constraints_init(struct device *dev)
> > -{
> > -	dev->power.power_state = PMSG_ON;
> > -}
> > -static inline void dev_pm_qos_constraints_destroy(struct device *dev)
> > -{
> > -	dev->power.power_state = PMSG_INVALID;
> > -}
> > -static inline int dev_pm_qos_add_ancestor_request(struct device *dev,
> > -				    struct dev_pm_qos_request *req, s32 value)
> > -			{ return 0; }
> > -#endif
> >  
> >  #endif
> 
> 

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