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Introduce CONFIG_SUSPEND for suspend-to-Ram and standby

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Introduce CONFIG_SUSPEND representing the ability to enter system sleep
states, such as the ACPI S3 state, and allow the user to choose SUSPEND
and HIBERNATION independently of each other.

Make HOTPLUG_CPU be selected automatically if SUSPEND or HIBERNATION has
been chosen and the kernel is intended for SMP systems.

Also, introduce CONFIG_PM_SLEEP which is automatically selected if
CONFIG_SUSPEND or CONFIG_HIBERNATION is set and use it to select the
code needed for both suspend and hibernation.

The top-level power management headers and the ACPI code related to
suspend and hibernation are modified to use the new definitions (the
changes in drivers/acpi/sleep/main.c are, mostly, moving code to reduce
the number of ifdefs).

There are many other files in which CONFIG_PM can be replaced with
CONFIG_PM_SLEEP or even with CONFIG_SUSPEND, but they can be updated in
the future.

Signed-off-by: Rafael J. Wysocki <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Rafael J. Wysocki 2007-07-29 23:27:18 +02:00 • committed by Linus Torvalds
commit 296699de6b
17 changed files with 164 additions and 86 deletions
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9
include/acpi/acpi_bus.h
View file

@ -366,7 +366,16 @@ acpi_handle acpi_get_child(acpi_handle, acpi_integer);
acpi_handle acpi_get_pci_rootbridge_handle(unsigned int, unsigned int);
#define DEVICE_ACPI_HANDLE(dev) ((acpi_handle)((dev)->archdata.acpi_handle))
#ifdef CONFIG_PM_SLEEP
int acpi_pm_device_sleep_state(struct device *, int, int *);
#else /* !CONFIG_PM_SLEEP */
static inline int acpi_pm_device_sleep_state(struct device *d, int w, int *p)
{
if (p)
*p = ACPI_STATE_D0;
return ACPI_STATE_D3;
}
#endif /* !CONFIG_PM_SLEEP */
#endif /* CONFIG_ACPI */

4
include/acpi/acpi_drivers.h
View file

@ -147,6 +147,10 @@ static inline void unregister_hotplug_dock_device(acpi_handle handle)
/*--------------------------------------------------------------------------
Suspend/Resume
-------------------------------------------------------------------------- */
#ifdef CONFIG_PM_SLEEP
extern int acpi_sleep_init(void);
#else
static inline int acpi_sleep_init(void) { return 0; }
#endif
#endif /*__ACPI_DRIVERS_H__*/