linux.git/kernel/power/user.c, branch v2.6.21.7

[PATCH] Revert "swsusp: disable nonboot CPUs before entering platform suspend"

2007-03-27T16:20:03+00:00

This reverts commit 94985134b7b46848267ed6b734320db01c974e72 and
insteads removes the WARN_ON() that caused that commit in the first
place.

The problem is that we call disable_nonboot_cpus() in swsusp before
powering down the system in order to avoid triggering the WARN_ON()
in arch/x86_64/kernel/acpi/sleep.c:init_low_mapping() and this doesn't
work well on Thomas' system.

So instead, remove the WARN_ON() in arch/x86_64/kernel/acpi/sleep.c:
init_low_mapping(), which triggers every time during the suspend to disk
in the platform mode, as the potential problem it is related to doesn't
seem to occur in practice.

[ I think we might want to disallow the case of multiple users of that
  mm, or something.  Normally, playing with the current process page
  tables on the current CPU should be fine as long as we don't have
  other threads using those tables at the same time..

  Anyway, not pretty, but better than the warning or the lockup - Linus ]

Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Linus Torvalds

[PATCH] swsusp: Fix SNAPSHOT_S2RAM ioctl

2007-03-23T02:39:05+00:00

The SNAPSHOT_S2RAM ioctl does not disable the nonboot CPUs before entering
the suspend, although it should do this.

Signed-off-by: Rafael J. Wysocki 
Acked-by: Pavel Machek 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] swsusp: disable nonboot CPUs before entering platform suspend

2007-03-17T02:25:03+00:00

Prevent the WARN_ON() in arch/x86_64/kernel/acpi/sleep.c:init_low_mapping()
from triggering by disabling nonboot CPUs before we finally enter the
platform suspend.

Signed-off-by: Rafael J. Wysocki 
Acked-by: Pavel Machek 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] swsusp: Change pm_ops handling by userland interface

2007-02-11T18:51:20+00:00

Make the userland interface of swsusp call pm_ops->finish() after
enable_nonboot_cpus() and before resume_device(), as indicated by the recent
discussion on Linux-PM (cf.
http://lists.osdl.org/pipermail/linux-pm/2006-November/004164.html).

This patch changes the SNAPSHOT_PMOPS ioctl so that its first function,
PMOPS_PREPARE, only sets a switch turning the platform suspend mode on, and
its last function, PMOPS_FINISH, only checks if the platform mode is enabled.
This should allow the older userland tools to work with new kernels without
any modifications.

The changes here only affect the userland interface of swsusp.

Signed-off-by: Rafael J. Wysocki 
Acked-by: Pavel Machek 
Cc: Greg KH 
Cc: Nigel Cunningham 
Cc: Patrick Mochel 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] swsusp-change-code-ordering-in-userc-sanity

2007-02-11T18:51:19+00:00

The compiler will do that.  And if it doesn't, we don't want to either ;)

Cc: Rafael J. Wysocki 
Cc: Pavel Machek 
Cc: Greg KH 
Cc: Nigel Cunningham 
Cc: Patrick Mochel 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] swsusp: Change code ordering in user.c

2007-02-11T18:51:19+00:00

Change the ordering of code in kernel/power/user.c so that device_suspend() is
called before disable_nonboot_cpus() and device_resume() is called after
enable_nonboot_cpus().  This is needed to make the userland suspend call
pm_ops->finish() after enable_nonboot_cpus() and before device_resume(), as
indicated by the recent discussion on Linux-PM (cf.
http://lists.osdl.org/pipermail/linux-pm/2006-November/004164.html).

The changes here only affect the userland interface of swsusp.

Signed-off-by: Rafael J. Wysocki 
Acked-by: Pavel Machek 
Cc: Greg KH 
Cc: Nigel Cunningham 
Cc: Patrick Mochel 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] swsusp: Do not fail if resume device is not set

2007-01-06T07:55:22+00:00

In the kernels later than 2.6.19 there is a regression that makes swsusp
fail if the resume device is not explicitly specified.

It can be fixed by adding an additional parameter to
mm/swapfile.c:swap_type_of() allowing us to pass the (struct block_device
*) corresponding to the first available swap back to the caller.

Signed-off-by: Rafael J. Wysocki 
Acked-by: Pavel Machek 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] struct seq_operations and struct file_operations constification

2006-12-07T16:39:46+00:00

 - move some file_operations structs into the .rodata section

 - move static strings from policy_types[] array into the .rodata section

 - fix generic seq_operations usages, so that those structs may be defined
   as "const" as well

[akpm@osdl.org: couple of fixes]
Signed-off-by: Helge Deller 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] swsusp: Fix labels

2006-12-07T16:39:28+00:00

Move all labels in the swsusp code to the second column, so that they won't
fool diff -p.

Signed-off-by: Rafael J. Wysocki 
Acked-by: Pavel Machek 
Cc: Nigel Cunningham 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] convert pm_sem to a mutex

2006-12-07T16:39:28+00:00

The power management semaphore is only used as mutex, so convert it.

[akpm@osdl.org: fix rotten bug]
Signed-off-by: Stephen Hemminger 
Acked-by: Ingo Molnar 
Acked-by: Pavel Machek 
Cc: "Rafael J. Wysocki" 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds