diff --git a/sys/dev/sound/pcm/feeder.h b/sys/dev/sound/pcm/feeder.h
--- a/sys/dev/sound/pcm/feeder.h
+++ b/sys/dev/sound/pcm/feeder.h
@@ -35,7 +35,6 @@
 struct feeder_class {
 	KOBJ_CLASS_FIELDS;
 	struct pcm_feederdesc desc;
-	void *data;
 	SLIST_ENTRY(feeder_class) link;
 };
 
@@ -64,13 +63,12 @@
 void feeder_printchain(struct pcm_feeder *head);
 int feeder_chain(struct pcm_channel *);
 
-#define FEEDER_DECLARE(feeder, type, pdata)				\
+#define FEEDER_DECLARE(feeder, type)					\
 static struct feeder_class feeder ## _class = {				\
 	.name =		#feeder,					\
 	.methods =	feeder ## _methods,				\
 	.size =		sizeof(struct pcm_feeder),			\
 	.desc =		{ type, 0, 0 },					\
-	.data =		pdata,						\
 };									\
 SYSINIT(feeder, SI_SUB_DRIVERS, SI_ORDER_ANY, feeder_register,		\
     &feeder ## _class)
diff --git a/sys/dev/sound/pcm/feeder.c b/sys/dev/sound/pcm/feeder.c
--- a/sys/dev/sound/pcm/feeder.c
+++ b/sys/dev/sound/pcm/feeder.c
@@ -88,7 +88,7 @@
 	if (f == NULL)
 		return NULL;
 
-	f->data = fc->data;
+	f->data = NULL;
 	f->source = NULL;
 	f->parent = NULL;
 	f->class = fc;
@@ -401,7 +401,6 @@
 	.methods =	feeder_root_methods,
 	.size =		sizeof(struct pcm_feeder),
 	.desc =		{ FEEDER_ROOT, 0, 0 },
-	.data =		NULL,
 };
 /*
  * Register the root feeder first so that pcm_addchan() and subsequent
diff --git a/sys/dev/sound/pcm/feeder_eq.c b/sys/dev/sound/pcm/feeder_eq.c
--- a/sys/dev/sound/pcm/feeder_eq.c
+++ b/sys/dev/sound/pcm/feeder_eq.c
@@ -427,7 +427,7 @@
 	KOBJMETHOD_END
 };
 
-FEEDER_DECLARE(feeder_eq, FEEDER_EQ, NULL);
+FEEDER_DECLARE(feeder_eq, FEEDER_EQ);
 
 static int32_t
 feed_eq_scan_preamp_arg(const char *s)
diff --git a/sys/dev/sound/pcm/feeder_format.c b/sys/dev/sound/pcm/feeder_format.c
--- a/sys/dev/sound/pcm/feeder_format.c
+++ b/sys/dev/sound/pcm/feeder_format.c
@@ -180,4 +180,4 @@
 	KOBJMETHOD_END
 };
 
-FEEDER_DECLARE(feeder_format, FEEDER_FORMAT, NULL);
+FEEDER_DECLARE(feeder_format, FEEDER_FORMAT);
diff --git a/sys/dev/sound/pcm/feeder_matrix.c b/sys/dev/sound/pcm/feeder_matrix.c
--- a/sys/dev/sound/pcm/feeder_matrix.c
+++ b/sys/dev/sound/pcm/feeder_matrix.c
@@ -405,7 +405,7 @@
 	KOBJMETHOD_END
 };
 
-FEEDER_DECLARE(feeder_matrix, FEEDER_MATRIX, NULL);
+FEEDER_DECLARE(feeder_matrix, FEEDER_MATRIX);
 
 /* External */
 int
diff --git a/sys/dev/sound/pcm/feeder_mixer.c b/sys/dev/sound/pcm/feeder_mixer.c
--- a/sys/dev/sound/pcm/feeder_mixer.c
+++ b/sys/dev/sound/pcm/feeder_mixer.c
@@ -366,4 +366,4 @@
 	KOBJMETHOD_END
 };
 
-FEEDER_DECLARE(feeder_mixer, FEEDER_MIXER, NULL);
+FEEDER_DECLARE(feeder_mixer, FEEDER_MIXER);
diff --git a/sys/dev/sound/pcm/feeder_rate.c b/sys/dev/sound/pcm/feeder_rate.c
--- a/sys/dev/sound/pcm/feeder_rate.c
+++ b/sys/dev/sound/pcm/feeder_rate.c
@@ -1714,4 +1714,4 @@
 	KOBJMETHOD_END
 };
 
-FEEDER_DECLARE(feeder_rate, FEEDER_RATE, NULL);
+FEEDER_DECLARE(feeder_rate, FEEDER_RATE);
diff --git a/sys/dev/sound/pcm/feeder_volume.c b/sys/dev/sound/pcm/feeder_volume.c
--- a/sys/dev/sound/pcm/feeder_volume.c
+++ b/sys/dev/sound/pcm/feeder_volume.c
@@ -314,7 +314,7 @@
 	KOBJMETHOD_END
 };
 
-FEEDER_DECLARE(feeder_volume, FEEDER_VOLUME, NULL);
+FEEDER_DECLARE(feeder_volume, FEEDER_VOLUME);
 
 /* Extern */