diff options
| author | Alan Stern <stern@rowland.harvard.edu> | 2007-11-19 23:49:18 +0100 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2008-02-01 18:30:54 -0500 |
| commit | 825257569350e913bee3bc918508c0aa6e3398cd (patch) | |
| tree | 2d016a04dfc09938565d5e932f0d2d5e43fb6bdd /kernel/power/main.c | |
| parent | 90dda1cb6ace6abd777f84bf051c4f86fa58986a (diff) | |
PM: Convert PM notifiers to out-of-line code
This patch (as1008b) converts the PM notifier routines from inline
calls to out-of-line code. It also prevents pm_chain_head from
being created when CONFIG_PM_SLEEP isn't enabled, and EXPORTs the
notifier registration and unregistration routines.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'kernel/power/main.c')
| -rw-r--r-- | kernel/power/main.c | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/kernel/power/main.c b/kernel/power/main.c index fc717b83682..0a9f269075e 100644 --- a/kernel/power/main.c +++ b/kernel/power/main.c @@ -24,13 +24,37 @@ #include "power.h" -BLOCKING_NOTIFIER_HEAD(pm_chain_head); - DEFINE_MUTEX(pm_mutex); unsigned int pm_flags; EXPORT_SYMBOL(pm_flags); +#ifdef CONFIG_PM_SLEEP + +/* Routines for PM-transition notifications */ + +static BLOCKING_NOTIFIER_HEAD(pm_chain_head); + +int register_pm_notifier(struct notifier_block *nb) +{ + return blocking_notifier_chain_register(&pm_chain_head, nb); +} +EXPORT_SYMBOL_GPL(register_pm_notifier); + +int unregister_pm_notifier(struct notifier_block *nb) +{ + return blocking_notifier_chain_unregister(&pm_chain_head, nb); +} +EXPORT_SYMBOL_GPL(unregister_pm_notifier); + +int pm_notifier_call_chain(unsigned long val) +{ + return (blocking_notifier_call_chain(&pm_chain_head, val, NULL) + == NOTIFY_BAD) ? -EINVAL : 0; +} + +#endif /* CONFIG_PM_SLEEP */ + #ifdef CONFIG_PM_DEBUG int pm_test_level = TEST_NONE; |