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-rw-r--r--kernel/sys.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/kernel/sys.c b/kernel/sys.c
index 18987c7f6ad..d40e40a9446 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -100,6 +100,13 @@ struct pid *cad_pid;
EXPORT_SYMBOL(cad_pid);
/*
+ * If set, this is used for preparing the system to power off.
+ */
+
+void (*pm_power_off_prepare)(void);
+EXPORT_SYMBOL(pm_power_off_prepare);
+
+/*
* Notifier list for kernel code which wants to be called
* at shutdown. This is used to stop any idling DMA operations
* and the like.
@@ -867,6 +874,8 @@ EXPORT_SYMBOL_GPL(kernel_halt);
void kernel_power_off(void)
{
kernel_shutdown_prepare(SYSTEM_POWER_OFF);
+ if (pm_power_off_prepare)
+ pm_power_off_prepare();
printk(KERN_EMERG "Power down.\n");
machine_power_off();
}