Index: head/sys/dev/nvme/nvme_ctrlr.c
===================================================================
--- head/sys/dev/nvme/nvme_ctrlr.c
+++ head/sys/dev/nvme/nvme_ctrlr.c
@@ -181,7 +181,7 @@
 {
 	int i;
 
-	ctrlr->is_failed = TRUE;
+	ctrlr->is_failed = true;
 	nvme_admin_qpair_disable(&ctrlr->adminq);
 	nvme_qpair_fail(&ctrlr->adminq);
 	if (ctrlr->ioq != NULL) {
@@ -546,7 +546,7 @@
 	return (0);
 }
 
-static boolean_t
+static bool
 is_log_page_id_valid(uint8_t page_id)
 {
 
@@ -558,10 +558,10 @@
 	case NVME_LOG_COMMAND_EFFECT:
 	case NVME_LOG_RES_NOTIFICATION:
 	case NVME_LOG_SANITIZE_STATUS:
-		return (TRUE);
+		return (true);
 	}
 
-	return (FALSE);
+	return (false);
 }
 
 static uint32_t
@@ -782,7 +782,7 @@
 	 * Disable timeout here, since asynchronous event requests should by
 	 *  nature never be timed out.
 	 */
-	req->timeout = FALSE;
+	req->timeout = false;
 	req->cmd.opc = NVME_OPC_ASYNC_EVENT_REQUEST;
 	nvme_ctrlr_submit_admin_request(ctrlr, req);
 }
@@ -1198,7 +1198,7 @@
 	TASK_INIT(&ctrlr->reset_task, 0, nvme_ctrlr_reset_task, ctrlr);
 	TASK_INIT(&ctrlr->fail_req_task, 0, nvme_ctrlr_fail_req_task, ctrlr);
 	STAILQ_INIT(&ctrlr->fail_req);
-	ctrlr->is_failed = FALSE;
+	ctrlr->is_failed = false;
 
 	make_dev_args_init(&md_args);
 	md_args.mda_devsw = &nvme_ctrlr_cdevsw;
Index: head/sys/dev/nvme/nvme_private.h
===================================================================
--- head/sys/dev/nvme/nvme_private.h
+++ head/sys/dev/nvme/nvme_private.h
@@ -141,7 +141,7 @@
 	} u;
 	uint32_t			type;
 	uint32_t			payload_size;
-	boolean_t			timeout;
+	bool				timeout;
 	nvme_cb_fn_t			cb_fn;
 	void				*cb_arg;
 	int32_t				retries;
@@ -214,7 +214,7 @@
 
 	struct nvme_tracker	**act_tr;
 
-	boolean_t		is_enabled;
+	bool			is_enabled;
 
 	struct mtx		lock __aligned(CACHE_LINE_SIZE);
 
@@ -322,7 +322,7 @@
 	uint32_t			is_initialized;
 	uint32_t			notification_sent;
 
-	boolean_t			is_failed;
+	bool				is_failed;
 	STAILQ_HEAD(, nvme_request)	fail_req;
 };
 
@@ -487,7 +487,7 @@
 	if (req != NULL) {
 		req->cb_fn = cb_fn;
 		req->cb_arg = cb_arg;
-		req->timeout = TRUE;
+		req->timeout = true;
 	}
 	return (req);
 }
Index: head/sys/dev/nvme/nvme_qpair.c
===================================================================
--- head/sys/dev/nvme/nvme_qpair.c
+++ head/sys/dev/nvme/nvme_qpair.c
@@ -357,7 +357,7 @@
 	    cpl->cdw0);
 }
 
-static boolean_t
+static bool
 nvme_completion_is_retry(const struct nvme_completion *cpl)
 {
 	uint8_t sct, sc, dnr;
@@ -423,7 +423,7 @@
 {
 	struct nvme_qpair * qpair = tr->qpair;
 	struct nvme_request	*req;
-	boolean_t		retry, error, retriable;
+	bool			retry, error, retriable;
 
 	req = tr->req;
 	error = nvme_completion_is_error(cpl);
@@ -508,7 +508,7 @@
     struct nvme_request *req, uint32_t sct, uint32_t sc)
 {
 	struct nvme_completion	cpl;
-	boolean_t		error;
+	bool			error;
 
 	memset(&cpl, 0, sizeof(cpl));
 	cpl.sqid = qpair->id;
@@ -1127,7 +1127,7 @@
 nvme_qpair_enable(struct nvme_qpair *qpair)
 {
 
-	qpair->is_enabled = TRUE;
+	qpair->is_enabled = true;
 }
 
 void
@@ -1215,7 +1215,7 @@
 {
 	struct nvme_tracker *tr;
 
-	qpair->is_enabled = FALSE;
+	qpair->is_enabled = false;
 	mtx_lock(&qpair->lock);
 	TAILQ_FOREACH(tr, &qpair->outstanding_tr, tailq)
 		callout_stop(&tr->timer);