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| author | Rafael J. Wysocki <rjw@sisk.pl> | 2010-09-22 22:09:10 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rjw@sisk.pl> | 2010-10-17 01:57:43 +0200 |
| commit | 074037ec79bea73edf1b1ec72fef1010e83e3cc5 (patch) | |
| tree | 1876caa07f755e680da5ea102d985efe4b508d56 /include/linux/suspend.h | |
| parent | 0702d9ee0f1dcb6258789032f03b3208bfafaffc (diff) | |
| download | lwn-074037ec79bea73edf1b1ec72fef1010e83e3cc5.tar.gz lwn-074037ec79bea73edf1b1ec72fef1010e83e3cc5.zip | |
PM / Wakeup: Introduce wakeup source objects and event statistics (v3)
Introduce struct wakeup_source for representing system wakeup sources
within the kernel and for collecting statistics related to them.
Make the recently introduced helper functions pm_wakeup_event(),
pm_stay_awake() and pm_relax() use struct wakeup_source objects
internally, so that wakeup statistics associated with wakeup devices
can be collected and reported in a consistent way (the definition of
pm_relax() is changed, which is harmless, because this function is
not called directly by anyone yet). Introduce new wakeup-related
sysfs device attributes in /sys/devices/.../power for reporting the
device wakeup statistics.
Change the global wakeup events counters event_count and
events_in_progress into atomic variables, so that it is not necessary
to acquire a global spinlock in pm_wakeup_event(), pm_stay_awake()
and pm_relax(), which should allow us to avoid lock contention in
these functions on SMP systems with many wakeup devices.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include/linux/suspend.h')
| -rw-r--r-- | include/linux/suspend.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/suspend.h b/include/linux/suspend.h index 4af270ec2204..6b1712c51102 100644 --- a/include/linux/suspend.h +++ b/include/linux/suspend.h @@ -293,8 +293,8 @@ extern int unregister_pm_notifier(struct notifier_block *nb); extern bool events_check_enabled; extern bool pm_check_wakeup_events(void); -extern bool pm_get_wakeup_count(unsigned long *count); -extern bool pm_save_wakeup_count(unsigned long count); +extern bool pm_get_wakeup_count(unsigned int *count); +extern bool pm_save_wakeup_count(unsigned int count); #else /* !CONFIG_PM_SLEEP */ static inline int register_pm_notifier(struct notifier_block *nb) |