linux/kernel/power/disk.c, branch v2.6.25

PM: Introduce PM_EVENT_HIBERNATE callback state

2008-02-23T18:40:04Z

During the last step of hibernation in the "platform" mode (with the help of ACPI) we use the suspend code, including the devices' ->suspend() methods, to prepare the system for entering the ACPI S4 system sleep state. But at least for some devices the operations performed by the ->suspend() callback in that case must be different from its operations during regular suspend. For this reason, introduce the new PM event type PM_EVENT_HIBERNATE and pass it to the device drivers' ->suspend() methods during the last phase of hibernation, so that they can distinguish this case and handle it as appropriate. Modify the drivers that handle PM_EVENT_SUSPEND in a special way and need to handle PM_EVENT_HIBERNATE in the same way. These changes are necessary to fix a hibernation regression related to the i915 driver (ref. http://lkml.org/lkml/2008/2/22/488). Signed-off-by: Rafael J. Wysocki Acked-by: Pavel Machek Tested-by: Jeff Chua Signed-off-by: Linus Torvalds

kernel/power/disk.c: make code static

2008-02-05T17:44:22Z

resume_file[] and create_image() can become static. Signed-off-by: Adrian Bunk Acked-by: Pavel Machek Cc: "Rafael J. Wysocki" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Hibernation: Invoke suspend notifications after console switch

2008-02-01T23:30:59Z

Following the recent change in the suspend code path, switch consoles before calling PM notifiers during hibernation. Signed-off-by: Rafael J. Wysocki Signed-off-by: Len Brown

Hibernation: Introduce begin() and end() callbacks

2008-02-01T23:30:58Z

Introduce global hibernation callback .end() and rename global hibernation callback .start() to .begin(), in analogy with the recent modifications of the global suspend callbacks. Signed-off-by: Rafael J. Wysocki Signed-off-by: Len Brown

Hibernation: Update messages

2008-02-01T23:30:55Z

Make hibernation messages start with one common prefix "PM: " and use the word "hibernation" in the messages as a synonym of "suspend to disk". Turn some KERN_INFO messages into debug ones. Signed-off-by: Rafael J. Wysocki Acked-by: Pavel Machek Signed-off-by: Len Brown

Hibernation: Fix comment in disk.c

2008-02-01T23:30:55Z

Fix a comment in kernel/power/disk.c so that it doesn't contain lines longer that 80 characters. Signed-off-by: Rafael J. Wysocki Acked-by: Pavel Machek Signed-off-by: Len Brown

Hibernation: Move low level resume to disk.c

2008-02-01T23:30:54Z

Move the low level restore code to kernel/power/disk.c , since the corresponding low level hibernation code is already there. Make restore fail if device_power_down(PMSG_PRETHAW) returns an error. Signed-off-by: Rafael J. Wysocki Acked-by: Pavel Machek Signed-off-by: Len Brown

Hibernation: New testing facility (rev. 2)

2008-02-01T23:30:54Z

Make it possible to test the hibernation core code with the help of the /sys/power/pm_test attribute introduced for suspend testing in the previous patch. Writing an appropriate string to this file causes the hibernation code to work in one of the test modes defined as follows: freezer - test the freezing of processes devices - test the freezing of processes and suspending of devices platform - test the freezing of processes, suspending of devices and platform global control methods(*) processors - test the freezing of processes, suspending of devices, platform global control methods(*) and the disabling of nonboot CPUs core - test the freezing of processes, suspending of devices, platform global control methods(*), the disabling of nonboot CPUs and suspending of platform/system devices (*) - the platform global control methods are only available on ACPI systems and are only tested if the hibernation mode is set to "platform" Then, if a hibernation is started by normal means, the hibernation core will perform its normal operations up to the point indicated by given test level. Next, it will wait for 5 seconds and carry out the resume operations needed to transition the system back to the fully functional state. Signed-off-by: Rafael J. Wysocki Acked-by: Pavel Machek Signed-off-by: Len Brown

Hibernation: Add PM_RESTORE_PREPARE and PM_POST_RESTORE notifiers (rev. 2)

2008-02-01T23:30:53Z

Add PM_RESTORE_PREPARE and PM_POST_RESTORE notifiers to the PM core, to be used in analogy with the existing PM_HIBERNATION_PREPARE and PM_POST_HIBERNATION notifiers. Signed-off-by: Alan Stern Acked-by: Pavel Machek Signed-off-by: "Rafael J. Wysocki" Signed-off-by: Len Brown

driver core: make /sys/power a kobject

2008-01-25T04:40:25Z

/sys/power should not be a kset, that's overkill. This patch renames it to power_kset and fixes up all usages of it in the tree. Cc: Kay Sievers Signed-off-by: Greg Kroah-Hartman