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-rw-r--r--include/linux/als_notify.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/als_notify.h b/include/linux/als_notify.h
index 6cde49e2fe4..1c35ca54727 100644
--- a/include/linux/als_notify.h
+++ b/include/linux/als_notify.h
@@ -19,6 +19,15 @@
#ifdef __KERNEL__
+#ifndef UINT16_MAX
+#define UINT16_MAX (65535U)
+#endif
+
+enum als_state {
+ ALS_ENABLED = (UINT16_MAX + 1),
+ ALS_DISABLED
+};
+
extern void als_register_notify(struct notifier_block *nb);
extern void als_unregister_notify(struct notifier_block *nb);
extern void als_notify_subscriber(unsigned long event);