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author | 2011-03-15 00:43:46 +0100 | |
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committer | 2011-03-15 00:43:46 +0100 | |
commit | 40dc166cb5dddbd36aa4ad11c03915ea538f5a61 (patch) | |
tree | 0a778159cf89ddee9e7d3134ae40569bdccd2a24 /include/linux/syscore_ops.h | |
parent | PM QoS: Make pm_qos settings readable (diff) | |
download | linux-40dc166cb5dddbd36aa4ad11c03915ea538f5a61.tar.gz linux-40dc166cb5dddbd36aa4ad11c03915ea538f5a61.tar.bz2 linux-40dc166cb5dddbd36aa4ad11c03915ea538f5a61.zip |
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/linux/syscore_ops.h')
-rw-r--r-- | include/linux/syscore_ops.h | 29 |
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 000000000000..27b3b0bc41a9 --- /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 |