From 9a0cd76bb00da4c1abfca72fbae31dae486a1cb4 Mon Sep 17 00:00:00 2001
From: John Baldwin <jhb@FreeBSD.org>
Date: Tue, 12 Apr 2022 14:58:57 -0700
Subject: [PATCH] riscv bounce_bus_dma_tag_destroy: Silence set but unused
 warning.

---
 sys/riscv/riscv/busdma_bounce.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/sys/riscv/riscv/busdma_bounce.c b/sys/riscv/riscv/busdma_bounce.c
index c3452c60539..25e676203fb 100644
--- a/sys/riscv/riscv/busdma_bounce.c
+++ b/sys/riscv/riscv/busdma_bounce.c
@@ -200,11 +200,13 @@ bounce_bus_dma_tag_create(bus_dma_tag_t parent, bus_size_t alignment,
 static int
 bounce_bus_dma_tag_destroy(bus_dma_tag_t dmat)
 {
-	bus_dma_tag_t dmat_copy, parent;
+#ifdef KTR
+	bus_dma_tag_t dmat_copy = dmat;
+#endif
+	bus_dma_tag_t parent;
 	int error;
 
 	error = 0;
-	dmat_copy = dmat;
 
 	if (dmat != NULL) {
 		if (dmat->map_count != 0) {