Hibernation: Introduce system_entering_hibernation

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Introduce boolean function system_entering_hibernation() returning
'true' during the last phase of hibernation, in which devices are
being put into low power states and the sleep state (for example,
ACPI S4) is finally entered.

Some device drivers need such a function to check if the system is
in the final phase of hibernation.  In particular, some SATA drivers
are going to use it for blacklisting systems in which the disks
should not be spun down during the last phase of hibernation (the
BIOS will do that anyway).

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

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Rafael J. Wysocki 2009-01-19 20:54:54 +01:00 • committed by Jeff Garzik

parent f3b8436ad9

commit abfe2d7b91

2 changed files with 12 additions and 0 deletions

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include/linux/suspend.h

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