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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2015-10-07 00:49:34 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2015-10-14 02:17:33 +0200
commitef25ba0476015908ef5960f9faac149ddf34ede0 (patch)
tree00f955d56fc042f68954edaffd456dfe4ce26ad4 /kernel/power
parentc2df86ea924a8548f54ce90e46fdd6c9495119b2 (diff)
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PM / sleep: Add flags to indicate platform firmware involvement
There are quite a few cases in which device drivers, bus types or even the PM core itself may benefit from knowing whether or not the platform firmware will be involved in the upcoming system power transition (during system suspend) or whether or not it was involved in it (during system resume). For this reason, introduce global system suspend flags that can be used by the platform code to expose that information for the benefit of the other parts of the kernel and make the ACPI core set them as appropriate. Users of the new flags will be added later. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'kernel/power')
-rw-r--r--kernel/power/suspend.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c
index 7e4cda4a8dd9..f9fe133c13e2 100644
--- a/kernel/power/suspend.c
+++ b/kernel/power/suspend.c
@@ -35,6 +35,9 @@
const char *pm_labels[] = { "mem", "standby", "freeze", NULL };
const char *pm_states[PM_SUSPEND_MAX];
+unsigned int pm_suspend_global_flags;
+EXPORT_SYMBOL_GPL(pm_suspend_global_flags);
+
static const struct platform_suspend_ops *suspend_ops;
static const struct platform_freeze_ops *freeze_ops;
static DECLARE_WAIT_QUEUE_HEAD(suspend_freeze_wait_head);
@@ -493,6 +496,7 @@ static int enter_state(suspend_state_t state)
#endif
pr_debug("PM: Preparing system for sleep (%s)\n", pm_states[state]);
+ pm_suspend_clear_flags();
error = suspend_prepare(state);
if (error)
goto Unlock;