From 825257569350e913bee3bc918508c0aa6e3398cd Mon Sep 17 00:00:00 2001 From: Alan Stern Date: Mon, 19 Nov 2007 23:49:18 +0100 Subject: 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 Signed-off-by: Rafael J. Wysocki Signed-off-by: Len Brown --- kernel/power/main.c | 28 ++++++++++++++++++++++++++-- kernel/power/power.h | 12 ++++-------- 2 files changed, 30 insertions(+), 10 deletions(-) (limited to 'kernel/power') 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; diff --git a/kernel/power/power.h b/kernel/power/power.h index f9f0d4d26c5..a9732fd1223 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); -- cgit v1.2.3