Hi, On Tuesday, August 16, 2011, jean.pihet@xxxxxxxxxxxxxx wrote: > From: Jean Pihet <j-pihet@xxxxxx> > > Add a global notification chain that gets called upon changes to the > aggregated constraint value for any device. > The notification callbacks are passing the full constraint request data > in order for the callees to have access to it. The current use is for the > platform low-level code to access the target device of the constraint. > > Signed-off-by: Jean Pihet <j-pihet@xxxxxx> > --- > drivers/base/power/qos.c | 84 ++++++++++++++++++++++++++++++++++++---------- > include/linux/pm_qos.h | 11 ++++++ > kernel/power/qos.c | 2 +- > 3 files changed, 78 insertions(+), 19 deletions(-) > > diff --git a/drivers/base/power/qos.c b/drivers/base/power/qos.c > index 304d68d..b52b3e8 100644 > --- a/drivers/base/power/qos.c > +++ b/drivers/base/power/qos.c > @@ -8,6 +8,12 @@ > * > * This QoS design is best effort based. Dependents register their QoS needs. > * Watchers register to keep track of the current QoS needs of the system. > + * Watchers can register different types of notification callbacks: > + * . a per-device notification callback using the dev_pm_qos_*_notifier API. > + * The notification chain data is stored in the per-device constraint > + * data struct. > + * . a system-wide notification callback using the dev_pm_qos_*_global_notifier > + * API. The notification chain data is stored in a static variable. > * > * Note about the per-device constraint data struct allocation: > * . The per-device constraints data struct ptr is tored into the device > @@ -36,8 +42,32 @@ > > > static DEFINE_MUTEX(dev_pm_qos_mtx); > +static BLOCKING_NOTIFIER_HEAD(dev_pm_notifiers); > static void dev_pm_qos_constraints_allocate(struct device *dev); > > +/* > + * Update the constraints list using the PM QoS core code and > + * if needed call the per-device and the global notification callbacks > + */ Well, if you add kerneldoc comments, please make them follow the standard, even if that's a static function. > +static int _apply_constraint(struct dev_pm_qos_request *req, The initial underscore looks odd and is not really necessary. Please drop it. The rest of the patch looks fine. Thanks, Rafael _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
