]> git.karo-electronics.de Git - linux-beck.git/commit
PM / Wakeup: Introduce wakeup source objects and event statistics (v3)
authorRafael J. Wysocki <rjw@sisk.pl>
Wed, 22 Sep 2010 20:09:10 +0000 (22:09 +0200)
committerRafael J. Wysocki <rjw@sisk.pl>
Sat, 16 Oct 2010 23:57:43 +0000 (01:57 +0200)
commit074037ec79bea73edf1b1ec72fef1010e83e3cc5
tree1876caa07f755e680da5ea102d985efe4b508d56
parent0702d9ee0f1dcb6258789032f03b3208bfafaffc
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>
Documentation/ABI/testing/sysfs-devices-power
drivers/base/power/main.c
drivers/base/power/power.h
drivers/base/power/runtime.c
drivers/base/power/sysfs.c
drivers/base/power/wakeup.c
include/linux/pm.h
include/linux/pm_wakeup.h
include/linux/suspend.h
kernel/power/main.c