sound: Retire unused feeder_printchain()

We can print it with "sndctl feederchain".

Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Reviewed by:	markj
Differential Revision:	https://reviews.freebsd.org/D53559

2 files changed, 0 insertions, 17 deletions

diff --git a/sys/dev/sound/pcm/feeder.c b/sys/dev/sound/pcm/feeder.c
index 75c0f0405040..e2d05f307f4d 100644
--- a/sys/dev/sound/pcm/feeder.c
+++ b/sys/dev/sound/pcm/feeder.c
@@ -318,22 +318,6 @@ snd_fmtbest(u_int32_t fmt, u_int32_t *fmts)
 		return best2;
 }
 
-void
-feeder_printchain(struct pcm_feeder *head)
-{
-	struct pcm_feeder *f;
-
-	printf("feeder chain (head @%p)\n", head);
-	f = head;
-	while (f != NULL) {
-		printf("%s @ %p\n", f->class->name, f);
-		f = f->source;
-	}
-	printf("[end]\n\n");
-}
-
-/*****************************************************************************/
-
 static int
 feed_root(struct pcm_feeder *feeder, struct pcm_channel *ch, u_int8_t *buffer, u_int32_t count, void *source)
 {
diff --git a/sys/dev/sound/pcm/feeder.h b/sys/dev/sound/pcm/feeder.h
index d191edd201e9..f1c96d86fda0 100644
--- a/sys/dev/sound/pcm/feeder.h
+++ b/sys/dev/sound/pcm/feeder.h
@@ -70,7 +70,6 @@ int feeder_add(struct pcm_channel *c, struct feeder_class *fc,
     struct pcm_feederdesc *desc);
 void feeder_remove(struct pcm_channel *c);
 struct pcm_feeder *feeder_find(struct pcm_channel *c, u_int32_t type);
-void feeder_printchain(struct pcm_feeder *head);
 int feeder_chain(struct pcm_channel *);
 
 #define FEEDER_DECLARE(feeder, ctype)					\