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Introduce ARCH_NO_SYSDEV_OPS config option (v2) 

Introduce Kconfig option allowing architectures where sysdev
operations used during system suspend, resume and shutdown have been
completely replaced with struct sycore_ops operations to avoid
building sysdev code that will never be used.

Make callbacks in struct sys_device and struct sysdev_driver depend
on ARCH_NO_SYSDEV_OPS to allows us to verify if all of the references
have been actually removed from the code the given architecture
depends on.

Make x86 select ARCH_NO_SYSDEV_OPS.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
This commit is contained in:
Rafael J. Wysocki 2011-03-23 22:16:41 +01:00
parent e00e56dfd3
commit d47d81c0e9
6 changed files with 27 additions and 5 deletions
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1
arch/x86/Kconfig
View File

@ -71,6 +71,7 @@ config X86
select GENERIC_IRQ_SHOW
select IRQ_FORCED_THREADING
select USE_GENERIC_SMP_HELPERS if SMP
select ARCH_NO_SYSDEV_OPS
config INSTRUCTION_DECODER
def_bool (KPROBES || PERF_EVENTS)

7
drivers/base/Kconfig
View File

@ -168,4 +168,11 @@ config SYS_HYPERVISOR
bool
default n
config ARCH_NO_SYSDEV_OPS
bool
---help---
To be selected by architectures that don't use sysdev class or
sysdev driver power management (suspend/resume) and shutdown
operations.
endmenu

3
drivers/base/sys.c
View File

@ -329,7 +329,7 @@ void sysdev_unregister(struct sys_device *sysdev)
}
#ifndef CONFIG_ARCH_NO_SYSDEV_OPS
/**
* sysdev_shutdown - Shut down all system devices.
*
@ -524,6 +524,7 @@ int sysdev_resume(void)
return 0;
}
EXPORT_SYMBOL_GPL(sysdev_resume);
#endif /* CONFIG_ARCH_NO_SYSDEV_OPS */
int __init system_bus_init(void)
{

4
include/linux/device.h
View File

@ -633,8 +633,12 @@ static inline int devtmpfs_mount(const char *mountpoint) { return 0; }
/* drivers/base/power/shutdown.c */
extern void device_shutdown(void);
#ifndef CONFIG_ARCH_NO_SYSDEV_OPS
/* drivers/base/sys.c */
extern void sysdev_shutdown(void);
#else
static inline void sysdev_shutdown(void) { }
#endif
/* debugging and troubleshooting/diagnostic helpers. */
extern const char *dev_driver_string(const struct device *dev);

10
include/linux/pm.h
View File

@ -529,13 +529,19 @@ struct dev_power_domain {
*/
#ifdef CONFIG_PM_SLEEP
extern void device_pm_lock(void);
#ifndef CONFIG_ARCH_NO_SYSDEV_OPS
extern int sysdev_suspend(pm_message_t state);
extern int sysdev_resume(void);
#else
static inline int sysdev_suspend(pm_message_t state) { return 0; }
static inline int sysdev_resume(void) { return 0; }
#endif
extern void device_pm_lock(void);
extern void dpm_resume_noirq(pm_message_t state);
extern void dpm_resume_end(pm_message_t state);
extern void device_pm_unlock(void);
extern int sysdev_suspend(pm_message_t state);
extern int dpm_suspend_noirq(pm_message_t state);
extern int dpm_suspend_start(pm_message_t state);

7
include/linux/sysdev.h
View File

@ -33,12 +33,13 @@ struct sysdev_class {
const char *name;
struct list_head drivers;
struct sysdev_class_attribute **attrs;
struct kset kset;
#ifndef CONFIG_ARCH_NO_SYSDEV_OPS
/* Default operations for these types of devices */
int (*shutdown)(struct sys_device *);
int (*suspend)(struct sys_device *, pm_message_t state);
int (*resume)(struct sys_device *);
struct kset kset;
#endif
};
struct sysdev_class_attribute {
@ -76,9 +77,11 @@ struct sysdev_driver {
struct list_head entry;
int (*add)(struct sys_device *);
int (*remove)(struct sys_device *);
#ifndef CONFIG_ARCH_NO_SYSDEV_OPS
int (*shutdown)(struct sys_device *);
int (*suspend)(struct sys_device *, pm_message_t state);
int (*resume)(struct sys_device *);
#endif
};