diff options
| author | Rafael J. Wysocki <rjw@sisk.pl> | 2007-07-29 23:27:18 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-29 16:45:38 -0700 |
| commit | 296699de6bdc717189a331ab6bbe90e05c94db06 (patch) | |
| tree | 53c847ecc8cce11952502921844052e44ca60d5e /include/linux/pm.h | |
| parent | b0cb1a19d05b8ea8611a9ef48a17fe417f1832e6 (diff) | |
Introduce CONFIG_SUSPEND for suspend-to-Ram and standby
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 <rjw@sisk.pl>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/pm.h')
| -rw-r--r-- | include/linux/pm.h | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/include/linux/pm.h b/include/linux/pm.h index ad3cc2eb0d3..e52f6f83c06 100644 --- a/include/linux/pm.h +++ b/include/linux/pm.h @@ -165,6 +165,7 @@ struct pm_ops { int (*finish)(suspend_state_t state); }; +#ifdef CONFIG_SUSPEND extern struct pm_ops *pm_ops; /** @@ -193,6 +194,12 @@ extern void arch_suspend_disable_irqs(void); extern void arch_suspend_enable_irqs(void); extern int pm_suspend(suspend_state_t state); +#else /* !CONFIG_SUSPEND */ +#define suspend_valid_only_mem NULL + +static inline void pm_set_ops(struct pm_ops *pm_ops) {} +static inline int pm_suspend(suspend_state_t state) { return -ENOSYS; } +#endif /* !CONFIG_SUSPEND */ /* * Device power management @@ -266,7 +273,7 @@ typedef struct pm_message { struct dev_pm_info { pm_message_t power_state; unsigned can_wakeup:1; -#ifdef CONFIG_PM +#ifdef CONFIG_PM_SLEEP unsigned should_wakeup:1; struct list_head entry; #endif @@ -276,7 +283,7 @@ extern int device_power_down(pm_message_t state); extern void device_power_up(void); extern void device_resume(void); -#ifdef CONFIG_PM +#ifdef CONFIG_PM_SLEEP extern int device_suspend(pm_message_t state); extern int device_prepare_suspend(pm_message_t state); @@ -306,7 +313,7 @@ static inline int call_platform_enable_wakeup(struct device *dev, int is_on) return 0; } -#else /* !CONFIG_PM */ +#else /* !CONFIG_PM_SLEEP */ static inline int device_suspend(pm_message_t state) { @@ -323,7 +330,7 @@ static inline int call_platform_enable_wakeup(struct device *dev, int is_on) return 0; } -#endif +#endif /* !CONFIG_PM_SLEEP */ /* changes to device_may_wakeup take effect on the next pm state change. * by default, devices should wakeup if they can. |