overlay_notify_chain 122 drivers/of/overlay.c static BLOCKING_NOTIFIER_HEAD(overlay_notify_chain); overlay_notify_chain 138 drivers/of/overlay.c return blocking_notifier_chain_register(&overlay_notify_chain, nb); overlay_notify_chain 148 drivers/of/overlay.c return blocking_notifier_chain_unregister(&overlay_notify_chain, nb); overlay_notify_chain 171 drivers/of/overlay.c ret = blocking_notifier_call_chain(&overlay_notify_chain,