1042 	struct read_only_notifier *notifier = &vdo->read_only_notifier;  in vdo_enable_read_only_entry()  local
1045 		notifier->read_only_error = VDO_READ_ONLY;  in vdo_enable_read_only_entry()
1046 		notifier->state = NOTIFIED;  in vdo_enable_read_only_entry()
1048 		notifier->state = MAY_NOT_NOTIFY;  in vdo_enable_read_only_entry()
1051 	spin_lock_init(&notifier->lock);  in vdo_enable_read_only_entry()
1052 	vdo_initialize_completion(&notifier->completion, vdo,  in vdo_enable_read_only_entry()
1073 	struct read_only_notifier *notifier = &vdo->read_only_notifier;  in vdo_wait_until_not_entering_read_only_mode()  local
1077 	if (notifier->waiter != NULL) {  in vdo_wait_until_not_entering_read_only_mode()
1082 	spin_lock(&notifier->lock);  in vdo_wait_until_not_entering_read_only_mode()
1083 	if (notifier->state == NOTIFYING)  in vdo_wait_until_not_entering_read_only_mode()
1084 		notifier->waiter = parent;  in vdo_wait_until_not_entering_read_only_mode()
1085 	else if (notifier->state == MAY_NOTIFY)  in vdo_wait_until_not_entering_read_only_mode()
1086 		notifier->state = MAY_NOT_NOTIFY;  in vdo_wait_until_not_entering_read_only_mode()
1087 	spin_unlock(&notifier->lock);  in vdo_wait_until_not_entering_read_only_mode()
1089 	if (notifier->waiter == NULL) {  in vdo_wait_until_not_entering_read_only_mode()
1117 	struct read_only_notifier *notifier = as_notifier(completion);  in finish_entering_read_only_mode()  local
1121 	spin_lock(&notifier->lock);  in finish_entering_read_only_mode()
1122 	notifier->state = NOTIFIED;  in finish_entering_read_only_mode()
1123 	spin_unlock(&notifier->lock);  in finish_entering_read_only_mode()
1125 	if (notifier->waiter != NULL)  in finish_entering_read_only_mode()
1126 		vdo_continue_completion(vdo_forget(notifier->waiter),  in finish_entering_read_only_mode()
1138 	struct read_only_notifier *notifier = as_notifier(completion);  in make_thread_read_only()  local
1148 			vdo_log_error_strerror(READ_ONCE(notifier->read_only_error),  in make_thread_read_only()
1187  * vdo_allow_read_only_mode_entry() - Allow the notifier to put the VDO into read-only mode,
1201 	struct read_only_notifier *notifier = &vdo->read_only_notifier;  in vdo_allow_read_only_mode_entry()  local
1205 	if (notifier->waiter != NULL) {  in vdo_allow_read_only_mode_entry()
1210 	spin_lock(&notifier->lock);  in vdo_allow_read_only_mode_entry()
1211 	if (notifier->state == MAY_NOT_NOTIFY) {  in vdo_allow_read_only_mode_entry()
1212 		if (notifier->read_only_error == VDO_SUCCESS) {  in vdo_allow_read_only_mode_entry()
1213 			notifier->state = MAY_NOTIFY;  in vdo_allow_read_only_mode_entry()
1215 			notifier->state = NOTIFYING;  in vdo_allow_read_only_mode_entry()
1216 			notifier->waiter = parent;  in vdo_allow_read_only_mode_entry()
1219 	spin_unlock(&notifier->lock);  in vdo_allow_read_only_mode_entry()
1221 	if (notifier->waiter == NULL) {  in vdo_allow_read_only_mode_entry()
1228 	make_thread_read_only(&notifier->completion);  in vdo_allow_read_only_mode_entry()
1243 	struct read_only_notifier *notifier = &vdo->read_only_notifier;  in vdo_enter_read_only_mode()  local
1257 	spin_lock(&notifier->lock);  in vdo_enter_read_only_mode()
1258 	if (notifier->read_only_error == VDO_SUCCESS) {  in vdo_enter_read_only_mode()
1259 		WRITE_ONCE(notifier->read_only_error, error_code);  in vdo_enter_read_only_mode()
1260 		if (notifier->state == MAY_NOTIFY) {  in vdo_enter_read_only_mode()
1261 			notifier->state = NOTIFYING;  in vdo_enter_read_only_mode()
1265 	spin_unlock(&notifier->lock);  in vdo_enter_read_only_mode()
1268 		/* The notifier is already aware of a read-only error */  in vdo_enter_read_only_mode()
1273 	vdo_launch_completion_callback(&notifier->completion, make_thread_read_only, 0);  in vdo_enter_read_only_mode()