PM: Do not use the syscore flag for runtime PM

The syscore device PM flag used to mark the devices (belonging to
PM domains) that should never be turned off, except for the system
core (syscore) suspend/hibernation and resume stages, need not be
accessed by the runtime PM core functions, because all of the devices
it is set for need to be marked as "irq safe" anyway and are
protected from being turned off by runtime PM by ensuring that their
usage counters are always set.

For this reason, make the syscore flag system-wide PM-specific
and simplify the code used for manipulating it, because it need not
acquire the device's power.lock any more.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>

1 files changed, 1 insertions, 5 deletions

diff --git a/include/linux/pm.h b/include/linux/pm.h
index b79a0dd3bc6d..44d1f2307dbc 100644
--- a/include/linux/pm.h
+++ b/include/linux/pm.h
@@ -43,12 +43,8 @@ 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 {
@@ -515,13 +511,13 @@ 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;
         struct completion       completion;
         struct wakeup_source    *wakeup;
         bool                    wakeup_path:1;
+        bool                    syscore:1;
 #else
         unsigned int            should_wakeup:1;
 #endif