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power management: fix struct layout and docs

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Because the pm ops in powermac are obviously not using them as intended, I
added documentation for it in kernel-doc format.

Reordering the fields in struct pm_ops not only makes the output of kernel-doc
make more sense but also removes a hole from the structure on 64-bit
platforms.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Cc: "Randy.Dunlap" <rdunlap@xenotime.net>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Pavel Macheck <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Johannes Berg 2007-02-16 01:38:30 -08:00 committed by Greg Kroah-Hartman
parent 9c372d06ce
commit 2a9df49451
1 changed files with 35 additions and 2 deletions
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37
include/linux/pm.h
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@ -120,15 +120,48 @@ typedef int __bitwise suspend_disk_method_t;
#define PM_DISK_TESTPROC ((__force suspend_disk_method_t) 6)
#define PM_DISK_MAX ((__force suspend_disk_method_t) 7)
/**
* struct pm_ops - Callbacks for managing platform dependent suspend states.
* @valid: Callback to determine whether the given state can be entered.
* If %CONFIG_SOFTWARE_SUSPEND is set then %PM_SUSPEND_DISK is
* always valid and never passed to this call.
* If not assigned, all suspend states are advertised as valid
* in /sys/power/state (but can still be rejected by prepare or enter.)
*
* @prepare: Prepare the platform for the given suspend state. Can return a
* negative error code if necessary.
*
* @enter: Enter the given suspend state, must be assigned. Can return a
* negative error code if necessary.
*
* @finish: Called when the system has left the given state and all devices
* are resumed. The return value is ignored.
*
* @pm_disk_mode: Set to the disk method that the user should be able to
* configure for suspend-to-disk. Since %PM_DISK_SHUTDOWN,
* %PM_DISK_REBOOT, %PM_DISK_TEST and %PM_DISK_TESTPROC
* are always allowed, currently only %PM_DISK_PLATFORM
* makes sense. If the user then choses %PM_DISK_PLATFORM,
* the @prepare call will be called before suspending to disk
* (if present), the @enter call should be present and will
* be called after all state has been saved and the machine
* is ready to be shut down/suspended/..., and the @finish
* callback is called after state has been restored. All
* these calls are called with %PM_SUSPEND_DISK as the state.
*/
struct pm_ops {
suspend_disk_method_t pm_disk_mode;
int (*valid)(suspend_state_t state);
int (*prepare)(suspend_state_t state);
int (*enter)(suspend_state_t state);
int (*finish)(suspend_state_t state);
suspend_disk_method_t pm_disk_mode;
};
extern void pm_set_ops(struct pm_ops *);
/**
* pm_set_ops - set platform dependent power management ops
* @pm_ops: The new power management operations to set.
*/
extern void pm_set_ops(struct pm_ops *pm_ops);
extern struct pm_ops *pm_ops;
extern int pm_suspend(suspend_state_t state);