PM / Core: Introduce struct syscore_ops for core subsystems PM

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Some subsystems need to carry out suspend/resume and shutdown
operations with one CPU on-line and interrupts disabled.  The only
way to register such operations is to define a sysdev class and
a sysdev specifically for this purpose which is cumbersome and
inefficient.  Moreover, the arguments taken by sysdev suspend,
resume and shutdown callbacks are practically never necessary.

For this reason, introduce a simpler interface allowing subsystems
to register operations to be executed very late during system suspend
and shutdown and very early during resume in the form of
strcut syscore_ops objects.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>

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This commit is contained in:

Rafael J. Wysocki 2011-03-15 00:43:46 +01:00

parent f9b9e806ae

commit 40dc166cb5

6 changed files with 164 additions and 1 deletions

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2

drivers/base/Makefile

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117

drivers/base/syscore.c

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29

include/linux/syscore_ops.h

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9

kernel/power/hibernate.c

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4

kernel/power/suspend.c

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4

kernel/sys.c

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