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authorRafael J. Wysocki <rjw@sisk.pl>2011-03-15 00:43:46 +0100
committerRafael J. Wysocki <rjw@sisk.pl>2011-03-15 00:43:46 +0100
commit40dc166cb5dddbd36aa4ad11c03915ea538f5a61 (patch)
tree0a778159cf89ddee9e7d3134ae40569bdccd2a24 /include
parentf9b9e806ae0ede772cbb9916d9ac7354a123d044 (diff)
PM / Core: Introduce struct syscore_ops for core subsystems PM
Some subsystems need to carry out suspend/resume and shutdown operations with one CPU on-line and interrupts disabled. The only way to register such operations is to define a sysdev class and a sysdev specifically for this purpose which is cumbersome and inefficient. Moreover, the arguments taken by sysdev suspend, resume and shutdown callbacks are practically never necessary. For this reason, introduce a simpler interface allowing subsystems to register operations to be executed very late during system suspend and shutdown and very early during resume in the form of strcut syscore_ops objects. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include')
-rw-r--r--include/linux/syscore_ops.h29
1 files changed, 29 insertions, 0 deletions
diff --git a/include/linux/syscore_ops.h b/include/linux/syscore_ops.h
new file mode 100644
index 00000000000..27b3b0bc41a
--- /dev/null
+++ b/include/linux/syscore_ops.h
@@ -0,0 +1,29 @@
+/*
+ * syscore_ops.h - System core operations.
+ *
+ * Copyright (C) 2011 Rafael J. Wysocki <rjw@sisk.pl>, Novell Inc.
+ *
+ * This file is released under the GPLv2.
+ */
+
+#ifndef _LINUX_SYSCORE_OPS_H
+#define _LINUX_SYSCORE_OPS_H
+
+#include <linux/list.h>
+
+struct syscore_ops {
+ struct list_head node;
+ int (*suspend)(void);
+ void (*resume)(void);
+ void (*shutdown)(void);
+};
+
+extern void register_syscore_ops(struct syscore_ops *ops);
+extern void unregister_syscore_ops(struct syscore_ops *ops);
+#ifdef CONFIG_PM_SLEEP
+extern int syscore_suspend(void);
+extern void syscore_resume(void);
+#endif
+extern void syscore_shutdown(void);
+
+#endif