2 * syscore.c - Execution of system core operations.
4 * Copyright (C) 2011 Rafael J. Wysocki <rjw@sisk.pl>, Novell Inc.
6 * This file is released under the GPLv2.
9 #include <linux/syscore_ops.h>
10 #include <linux/mutex.h>
11 #include <linux/module.h>
13 static LIST_HEAD(syscore_ops_list);
14 static DEFINE_MUTEX(syscore_ops_lock);
17 * register_syscore_ops - Register a set of system core operations.
18 * @ops: System core operations to register.
20 void register_syscore_ops(struct syscore_ops *ops)
22 mutex_lock(&syscore_ops_lock);
23 list_add_tail(&ops->node, &syscore_ops_list);
24 mutex_unlock(&syscore_ops_lock);
26 EXPORT_SYMBOL_GPL(register_syscore_ops);
29 * unregister_syscore_ops - Unregister a set of system core operations.
30 * @ops: System core operations to unregister.
32 void unregister_syscore_ops(struct syscore_ops *ops)
34 mutex_lock(&syscore_ops_lock);
36 mutex_unlock(&syscore_ops_lock);
38 EXPORT_SYMBOL_GPL(unregister_syscore_ops);
40 #ifdef CONFIG_PM_SLEEP
42 * syscore_suspend - Execute all the registered system core suspend callbacks.
44 * This function is executed with one CPU on-line and disabled interrupts.
46 int syscore_suspend(void)
48 struct syscore_ops *ops;
51 WARN_ONCE(!irqs_disabled(),
52 "Interrupts enabled before system core suspend.\n");
54 list_for_each_entry_reverse(ops, &syscore_ops_list, node)
57 pr_info("PM: Calling %pF\n", ops->suspend);
61 WARN_ONCE(!irqs_disabled(),
62 "Interrupts enabled after %pF\n", ops->suspend);
68 pr_err("PM: System core suspend callback %pF failed.\n", ops->suspend);
70 list_for_each_entry_continue(ops, &syscore_ops_list, node)
78 * syscore_resume - Execute all the registered system core resume callbacks.
80 * This function is executed with one CPU on-line and disabled interrupts.
82 void syscore_resume(void)
84 struct syscore_ops *ops;
86 WARN_ONCE(!irqs_disabled(),
87 "Interrupts enabled before system core resume.\n");
89 list_for_each_entry(ops, &syscore_ops_list, node)
92 pr_info("PM: Calling %pF\n", ops->resume);
94 WARN_ONCE(!irqs_disabled(),
95 "Interrupts enabled after %pF\n", ops->resume);
98 #endif /* CONFIG_PM_SLEEP */
101 * syscore_shutdown - Execute all the registered system core shutdown callbacks.
103 void syscore_shutdown(void)
105 struct syscore_ops *ops;
107 mutex_lock(&syscore_ops_lock);
109 list_for_each_entry_reverse(ops, &syscore_ops_list, node)
112 pr_info("PM: Calling %pF\n", ops->shutdown);
116 mutex_unlock(&syscore_ops_lock);