diff --git a/sys/cam/cam_xpt.c b/sys/cam/cam_xpt.c
--- a/sys/cam/cam_xpt.c
+++ b/sys/cam/cam_xpt.c
@@ -166,6 +166,7 @@
 struct cam_doneq {
 	struct mtx_padalign	cam_doneq_mtx;
 	STAILQ_HEAD(, ccb_hdr)	cam_doneq;
+	STAILQ_HEAD(, ccb_hdr)	tmp;
 	int			cam_doneq_sleep;
 };
 
@@ -954,6 +955,7 @@
 		mtx_init(&cam_doneqs[i].cam_doneq_mtx, "CAM doneq", NULL,
 		    MTX_DEF);
 		STAILQ_INIT(&cam_doneqs[i].cam_doneq);
+		STAILQ_INIT(&cam_doneqs[i].tmp);
 		error = kproc_kthread_add(xpt_done_td, &cam_doneqs[i],
 		    &cam_proc, NULL, 0, 0, "cam", "doneq%d", i);
 		if (error != 0) {
@@ -5384,19 +5386,18 @@
 {
 	struct cam_doneq *queue = arg;
 	struct ccb_hdr *ccb_h;
-	STAILQ_HEAD(, ccb_hdr)	doneq;
 
-	STAILQ_INIT(&doneq);
+	STAILQ_INIT(&queue->tmp);
 	mtx_lock(&queue->cam_doneq_mtx);
 	while (1) {
 		while (STAILQ_EMPTY(&queue->cam_doneq))
 			msleep(&queue->cam_doneq, &queue->cam_doneq_mtx,
 			    PRIBIO, "-", 0);
-		STAILQ_CONCAT(&doneq, &queue->cam_doneq);
+		STAILQ_CONCAT(&queue->tmp, &queue->cam_doneq);
 		mtx_unlock(&queue->cam_doneq_mtx);
 
-		while ((ccb_h = STAILQ_FIRST(&doneq)) != NULL) {
-			STAILQ_REMOVE_HEAD(&doneq, sim_links.stqe);
+		while ((ccb_h = STAILQ_FIRST(&queue->tmp)) != NULL) {
+			STAILQ_REMOVE_HEAD(&queue->tmp, sim_links.stqe);
 			xpt_done_process(ccb_h);
 		}
 
@@ -5409,9 +5410,8 @@
 {
 	struct cam_doneq *queue = arg;
 	struct ccb_hdr *ccb_h;
-	STAILQ_HEAD(, ccb_hdr)	doneq;
 
-	STAILQ_INIT(&doneq);
+	STAILQ_INIT(&queue->tmp);
 	mtx_lock(&queue->cam_doneq_mtx);
 	while (1) {
 		while (STAILQ_EMPTY(&queue->cam_doneq)) {
@@ -5420,12 +5420,12 @@
 			    PRIBIO, "-", 0);
 			queue->cam_doneq_sleep = 0;
 		}
-		STAILQ_CONCAT(&doneq, &queue->cam_doneq);
+		STAILQ_CONCAT(&queue->tmp, &queue->cam_doneq);
 		mtx_unlock(&queue->cam_doneq_mtx);
 
 		THREAD_NO_SLEEPING();
-		while ((ccb_h = STAILQ_FIRST(&doneq)) != NULL) {
-			STAILQ_REMOVE_HEAD(&doneq, sim_links.stqe);
+		while ((ccb_h = STAILQ_FIRST(&queue->tmp)) != NULL) {
+			STAILQ_REMOVE_HEAD(&queue->tmp, sim_links.stqe);
 			xpt_done_process(ccb_h);
 		}
 		THREAD_SLEEPING_OK();