1051 	struct read_only_notifier *notifier = &vdo->read_only_notifier;  in vdo_enable_read_only_entry()  local
1054 		notifier->read_only_error = VDO_READ_ONLY;  in vdo_enable_read_only_entry()
1055 		notifier->state = NOTIFIED;  in vdo_enable_read_only_entry()
1057 		notifier->state = MAY_NOT_NOTIFY;  in vdo_enable_read_only_entry()
1060 	spin_lock_init(&notifier->lock);  in vdo_enable_read_only_entry()
1061 	vdo_initialize_completion(&notifier->completion, vdo,  in vdo_enable_read_only_entry()
1082 	struct read_only_notifier *notifier = &vdo->read_only_notifier;  in vdo_wait_until_not_entering_read_only_mode()  local
1086 	if (notifier->waiter != NULL) {  in vdo_wait_until_not_entering_read_only_mode()
1091 	spin_lock(&notifier->lock);  in vdo_wait_until_not_entering_read_only_mode()
1092 	if (notifier->state == NOTIFYING)  in vdo_wait_until_not_entering_read_only_mode()
1093 		notifier->waiter = parent;  in vdo_wait_until_not_entering_read_only_mode()
1094 	else if (notifier->state == MAY_NOTIFY)  in vdo_wait_until_not_entering_read_only_mode()
1095 		notifier->state = MAY_NOT_NOTIFY;  in vdo_wait_until_not_entering_read_only_mode()
1096 	spin_unlock(&notifier->lock);  in vdo_wait_until_not_entering_read_only_mode()
1098 	if (notifier->waiter == NULL) {  in vdo_wait_until_not_entering_read_only_mode()
1126 	struct read_only_notifier *notifier = as_notifier(completion);  in finish_entering_read_only_mode()  local
1130 	spin_lock(&notifier->lock);  in finish_entering_read_only_mode()
1131 	notifier->state = NOTIFIED;  in finish_entering_read_only_mode()
1132 	spin_unlock(&notifier->lock);  in finish_entering_read_only_mode()
1134 	if (notifier->waiter != NULL)  in finish_entering_read_only_mode()
1135 		vdo_continue_completion(vdo_forget(notifier->waiter),  in finish_entering_read_only_mode()
1147 	struct read_only_notifier *notifier = as_notifier(completion);  in make_thread_read_only()  local
1157 			vdo_log_error_strerror(READ_ONCE(notifier->read_only_error),  in make_thread_read_only()
1210 	struct read_only_notifier *notifier = &vdo->read_only_notifier;  in vdo_allow_read_only_mode_entry()  local
1214 	if (notifier->waiter != NULL) {  in vdo_allow_read_only_mode_entry()
1219 	spin_lock(&notifier->lock);  in vdo_allow_read_only_mode_entry()
1220 	if (notifier->state == MAY_NOT_NOTIFY) {  in vdo_allow_read_only_mode_entry()
1221 		if (notifier->read_only_error == VDO_SUCCESS) {  in vdo_allow_read_only_mode_entry()
1222 			notifier->state = MAY_NOTIFY;  in vdo_allow_read_only_mode_entry()
1224 			notifier->state = NOTIFYING;  in vdo_allow_read_only_mode_entry()
1225 			notifier->waiter = parent;  in vdo_allow_read_only_mode_entry()
1228 	spin_unlock(&notifier->lock);  in vdo_allow_read_only_mode_entry()
1230 	if (notifier->waiter == NULL) {  in vdo_allow_read_only_mode_entry()
1237 	make_thread_read_only(&notifier->completion);  in vdo_allow_read_only_mode_entry()
1252 	struct read_only_notifier *notifier = &vdo->read_only_notifier;  in vdo_enter_read_only_mode()  local
1266 	spin_lock(&notifier->lock);  in vdo_enter_read_only_mode()
1267 	if (notifier->read_only_error == VDO_SUCCESS) {  in vdo_enter_read_only_mode()
1268 		WRITE_ONCE(notifier->read_only_error, error_code);  in vdo_enter_read_only_mode()
1269 		if (notifier->state == MAY_NOTIFY) {  in vdo_enter_read_only_mode()
1270 			notifier->state = NOTIFYING;  in vdo_enter_read_only_mode()
1274 	spin_unlock(&notifier->lock);  in vdo_enter_read_only_mode()
1282 	vdo_launch_completion_callback(&notifier->completion, make_thread_read_only, 0);  in vdo_enter_read_only_mode()