diff --git a/sys/dev/sound/pcm/sound.c b/sys/dev/sound/pcm/sound.c
index 2f64105b705f..55aa7720933d 100644
--- a/sys/dev/sound/pcm/sound.c
+++ b/sys/dev/sound/pcm/sound.c
@@ -95,14 +95,6 @@ TUNABLE_INT_DECL("hw.snd.unit", 0, snd_unit);
 
 SYSCTL_NODE(_hw, OID_AUTO, snd, CTLFLAG_RD, 0, "Sound driver");
 
-#ifndef USING_MUTEX
-#define	SPLSTACK_MAX	32
-struct splstack {
-	int depth;
-	u_int32_t stack[SPLSTACK_MAX];
-};
-#endif
-
 void *
 snd_mtxcreate(const char *desc)
 {
@@ -115,11 +107,7 @@ snd_mtxcreate(const char *desc)
 	mtx_init(m, desc, MTX_RECURSE);
 	return m;
 #else
-	struct splstack *s;
-
-	s = malloc(sizeof(*s), M_DEVBUF, M_WAITOK | M_ZERO);
-	s->depth = 0;
-	return s;
+	return (void *)0xcafebabe;
 #endif
 }
 
@@ -132,10 +120,6 @@ snd_mtxfree(void *m)
 	mtx_assert(mtx, MA_OWNED);
 	mtx_destroy(mtx);
 	free(mtx, M_DEVBUF);
-#else
-	struct splstack *s = m;
-
-	free(s, M_DEVBUF);
 #endif
 }
 
@@ -146,8 +130,6 @@ snd_mtxassert(void *m)
 	struct mtx *mtx = m;
 
 	mtx_assert(mtx, MA_OWNED);
-#else
-	KASSERT(((struct splstack *)s)->depth > 0, ("splstack depth <= 0"));
 #endif
 }
 
@@ -158,11 +140,6 @@ snd_mtxlock(void *m)
 	struct mtx *mtx = m;
 
 	mtx_lock(mtx);
-#else
-	struct splstack *s = m;
-
-	KASSERT((s->depth >= 0) && (s->depth < SPLSTACK_MAX), ("bad depth %d", s->depth));
-	s->stack[s->depth++] = spltty();
 #endif
 }
 
@@ -173,11 +150,6 @@ snd_mtxunlock(void *m)
 	struct mtx *mtx = m;
 
 	mtx_unlock(mtx);
-#else
-	struct splstack *s = m;
-
-	KASSERT((s->depth >= 1) && (s->depth < SPLSTACK_MAX), ("bad depth %d", s->depth));
-	splx(s->stack[s->depth--]);
 #endif
 }