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PM / Domains: Move syscore flag from subsys data to struct device

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The syscore device PM flag is used to mark the devices (belonging to
a PM domain) that should never be turned off, except for the system
core (syscore) suspend/hibernation and resume stages.  That flag is
stored in the device's struct pm_subsys_data object whose address is
available from struct device.  However, in some situations it may be
convenient to set that flag before the device is added to a PM
domain, so it is better to move it directly to the "power" member of
struct device.  Then, it can be checked by the routines in
drivers/base/power/runtime.c and drivers/base/power/main.c, which is
more straightforward.

This also reduces the number of dev_gpd_data() invocations in the
generic PM domains framework, so the overhead related to the syscore
flag is slightly smaller.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Magnus Damm <damm@opensource.se>
This commit is contained in:
Rafael J. Wysocki 2012-08-06 01:46:39 +02:00
commit dbf374142d
9 changed files with 58 additions and 38 deletions
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5
include/linux/pm.h
View file

@ -43,8 +43,12 @@ struct device;
#ifdef CONFIG_PM
extern const char power_group_name[]; /* = "power" */
extern void dev_pm_syscore_device(struct device *dev, bool val);
#else
#define power_group_name NULL
static inline void dev_pm_syscore_device(struct device *dev, bool val) {}
#endif
typedef struct pm_message {
@ -511,6 +515,7 @@ struct dev_pm_info {
bool is_suspended:1; /* Ditto */
bool ignore_children:1;
bool early_init:1; /* Owned by the PM core */
bool syscore:1;
spinlock_t lock;
#ifdef CONFIG_PM_SLEEP
struct list_head entry;

3
include/linux/pm_domain.h
View file

@ -114,7 +114,6 @@ struct generic_pm_domain_data {
struct mutex lock;
unsigned int refcount;
bool need_restore;
bool syscore;
};
#ifdef CONFIG_PM_GENERIC_DOMAINS
@ -153,7 +152,6 @@ static inline int pm_genpd_of_add_device(struct device_node *genpd_node,
extern int pm_genpd_remove_device(struct generic_pm_domain *genpd,
struct device *dev);
extern void pm_genpd_dev_syscore(struct device *dev, bool val);
extern void pm_genpd_dev_need_restore(struct device *dev, bool val);
extern int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
struct generic_pm_domain *new_subdomain);
@ -199,7 +197,6 @@ static inline int pm_genpd_remove_device(struct generic_pm_domain *genpd,
{
return -ENOSYS;
}
static inline void pm_genpd_dev_syscore(struct device *dev, bool val) {}
static inline void pm_genpd_dev_need_restore(struct device *dev, bool val) {}
static inline int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
struct generic_pm_domain *new_sd)