Suspend: Fix compilation warning for CONFIG_SUSPEND unset

[linux-2.6-omap-h63xx.git] / kernel / power / main.c

diff --git a/kernel/power/main.c b/kernel/power/main.c
index fc717b836828fdb991532dc8d20c40851535b127..7fb805de19a85fd6272a6562f0ccc0e9f38fa0e7 100644 (file)
--- a/kernel/power/main.c
+++ b/kernel/power/main.c
@@ -24,13 +24,39 @@
 
 #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_SUSPEND
+
 #ifdef CONFIG_PM_DEBUG
 int pm_test_level = TEST_NONE;