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| author | Rafael J. Wysocki <rjw@sisk.pl> | 2012-08-06 01:46:39 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rjw@sisk.pl> | 2012-09-04 01:36:04 +0200 |
| commit | dbf374142dd7a3c394ec124ebe7339a6c412d9b6 (patch) | |
| tree | 593b26dff2da2f364ed1ad97e667d691487d7e69 /include/linux/pm.h | |
| parent | 6fb28badf207a6d8a78906353772e1c3f560a977 (diff) | |
| download | lwn-dbf374142dd7a3c394ec124ebe7339a6c412d9b6.tar.gz lwn-dbf374142dd7a3c394ec124ebe7339a6c412d9b6.zip | |
PM / Domains: Move syscore flag from subsys data to struct device
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>
Diffstat (limited to 'include/linux/pm.h')
| -rw-r--r-- | include/linux/pm.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/pm.h b/include/linux/pm.h index 716517af1543..b79a0dd3bc6d 100644 --- a/include/linux/pm.h +++ b/include/linux/pm.h @@ -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; |