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40dc166cb5
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>
30 lines
635 B
C
30 lines
635 B
C
/*
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* syscore_ops.h - System core operations.
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*
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* Copyright (C) 2011 Rafael J. Wysocki <rjw@sisk.pl>, Novell Inc.
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*
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* This file is released under the GPLv2.
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*/
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#ifndef _LINUX_SYSCORE_OPS_H
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#define _LINUX_SYSCORE_OPS_H
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#include <linux/list.h>
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struct syscore_ops {
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struct list_head node;
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int (*suspend)(void);
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void (*resume)(void);
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void (*shutdown)(void);
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};
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extern void register_syscore_ops(struct syscore_ops *ops);
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extern void unregister_syscore_ops(struct syscore_ops *ops);
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#ifdef CONFIG_PM_SLEEP
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extern int syscore_suspend(void);
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extern void syscore_resume(void);
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#endif
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extern void syscore_shutdown(void);
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#endif
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