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authorLinus Torvalds <torvalds@linux-foundation.org>2010-08-04 20:14:36 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2010-08-04 20:14:36 +0200
commitf46e9913faeebcb6bd29edf795f12b60acbff171 (patch)
tree1ed8871d0ebd638094d27317de1d8a53712ae15a /Documentation/ABI
parentMerge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cp... (diff)
parentPM / Runtime: Add runtime PM statistics (v3) (diff)
downloadlinux-f46e9913faeebcb6bd29edf795f12b60acbff171.tar.xz
linux-f46e9913faeebcb6bd29edf795f12b60acbff171.zip
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6: PM / Runtime: Add runtime PM statistics (v3) PM / Runtime: Make runtime_status attribute not debug-only (v. 2) PM: Do not use dynamically allocated objects in pm_wakeup_event() PM / Suspend: Fix ordering of calls in suspend error paths PM / Hibernate: Fix snapshot error code path PM / Hibernate: Fix hibernation_platform_enter() pm_qos: Get rid of the allocation in pm_qos_add_request() pm_qos: Reimplement using plists plist: Add plist_last PM: Make it possible to avoid races between wakeup and system sleep PNPACPI: Add support for remote wakeup PM: describe kernel policy regarding wakeup defaults (v. 2) PM / Hibernate: Fix typos in comments in kernel/power/swap.c
Diffstat (limited to 'Documentation/ABI')
-rw-r--r--Documentation/ABI/testing/sysfs-power15
1 files changed, 15 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-power b/Documentation/ABI/testing/sysfs-power
index d6a801f45b48..2875f1f74a07 100644
--- a/Documentation/ABI/testing/sysfs-power
+++ b/Documentation/ABI/testing/sysfs-power
@@ -114,3 +114,18 @@ Description:
if this file contains "1", which is the default. It may be
disabled by writing "0" to this file, in which case all devices
will be suspended and resumed synchronously.
+
+What: /sys/power/wakeup_count
+Date: July 2010
+Contact: Rafael J. Wysocki <rjw@sisk.pl>
+Description:
+ The /sys/power/wakeup_count file allows user space to put the
+ system into a sleep state while taking into account the
+ concurrent arrival of wakeup events. Reading from it returns
+ the current number of registered wakeup events and it blocks if
+ some wakeup events are being processed at the time the file is
+ read from. Writing to it will only succeed if the current
+ number of wakeup events is equal to the written value and, if
+ successful, will make the kernel abort a subsequent transition
+ to a sleep state if any wakeup events are reported after the
+ write has returned.