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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/pm.h | |
| parent | 0702d9ee0f1dcb6258789032f03b3208bfafaffc (diff) | |
| download | kernel-common-074037ec79bea73edf1b1ec72fef1010e83e3cc5.tar.gz kernel-common-074037ec79bea73edf1b1ec72fef1010e83e3cc5.tar.bz2 kernel-common-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/pm.h')
| -rw-r--r-- | include/linux/pm.h | 16 |
1 files changed, 4 insertions, 12 deletions
diff --git a/include/linux/pm.h b/include/linux/pm.h index 52e8c55ff314..a84118911ced 100644 --- a/include/linux/pm.h +++ b/include/linux/pm.h @@ -448,23 +448,24 @@ enum rpm_request { RPM_REQ_RESUME, }; +struct wakeup_source; + struct dev_pm_info { pm_message_t power_state; unsigned int can_wakeup:1; - unsigned int should_wakeup:1; unsigned async_suspend:1; enum dpm_state status; /* Owned by the PM core */ + spinlock_t lock; #ifdef CONFIG_PM_SLEEP struct list_head entry; struct completion completion; - unsigned long wakeup_count; + struct wakeup_source *wakeup; #endif #ifdef CONFIG_PM_RUNTIME struct timer_list suspend_timer; unsigned long timer_expires; struct work_struct work; wait_queue_head_t wait_queue; - spinlock_t lock; atomic_t usage_count; atomic_t child_count; unsigned int disable_depth:3; @@ -559,11 +560,6 @@ extern void __suspend_report_result(const char *function, void *fn, int ret); } while (0) extern void device_pm_wait_for_dev(struct device *sub, struct device *dev); - -/* drivers/base/power/wakeup.c */ -extern void pm_wakeup_event(struct device *dev, unsigned int msec); -extern void pm_stay_awake(struct device *dev); -extern void pm_relax(void); #else /* !CONFIG_PM_SLEEP */ #define device_pm_lock() do {} while (0) @@ -577,10 +573,6 @@ static inline int dpm_suspend_start(pm_message_t state) #define suspend_report_result(fn, ret) do {} while (0) static inline void device_pm_wait_for_dev(struct device *a, struct device *b) {} - -static inline void pm_wakeup_event(struct device *dev, unsigned int msec) {} -static inline void pm_stay_awake(struct device *dev) {} -static inline void pm_relax(void) {} #endif /* !CONFIG_PM_SLEEP */ /* How to reorder dpm_list after device_move() */ |