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 | |
| parent | PM: Make PM_TRACE more architecture independent (diff) | |
| download | linux-dev-825257569350e913bee3bc918508c0aa6e3398cd.tar.xz linux-dev-825257569350e913bee3bc918508c0aa6e3398cd.zip | |
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')
| -rw-r--r-- | kernel/power/main.c | 28 | ||||
| -rw-r--r-- | kernel/power/power.h | 12 |
2 files changed, 30 insertions, 10 deletions
diff --git a/kernel/power/main.c b/kernel/power/main.c index fc717b836828..0a9f269075ee 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; diff --git a/kernel/power/power.h b/kernel/power/power.h index f9f0d4d26c50..a9732fd12239 100644 --- a/kernel/power/power.h +++ b/kernel/power/power.h @@ -172,14 +172,10 @@ static inline int suspend_devices_and_enter(suspend_state_t state) } #endif /* !CONFIG_SUSPEND */ -/* kernel/power/common.c */ -extern struct blocking_notifier_head pm_chain_head; - -static inline int pm_notifier_call_chain(unsigned long val) -{ - return (blocking_notifier_call_chain(&pm_chain_head, val, NULL) - == NOTIFY_BAD) ? -EINVAL : 0; -} +#ifdef CONFIG_PM_SLEEP +/* kernel/power/main.c */ +extern int pm_notifier_call_chain(unsigned long val); +#endif #ifdef CONFIG_HIGHMEM unsigned int count_highmem_pages(void); |