From ab85003bf54049316f11f3c6a3dd3e3bf11b46ff Mon Sep 17 00:00:00 2001
From: Bruce Evans <bde@FreeBSD.org>
Date: Sun, 15 Sep 2002 08:21:14 +0000
Subject: [PATCH] Fixed breakage from removing the used include of <sys/buf.h>
 in the previous commit: Include <sys/mutex.h> and its prerequisite
 <sys/lock.h> instead of depending on namespace pollution in <sys/buf.h>. 
 Only do this in the __FreeBSD_version > 500000 case although the
 __FreeBSD_version < 500000 case has already rotted.

---
 sys/dev/sound/pcm/sound.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sys/dev/sound/pcm/sound.h b/sys/dev/sound/pcm/sound.h
index 7afa9485db48..5966e364cdae 100644
--- a/sys/dev/sound/pcm/sound.h
+++ b/sys/dev/sound/pcm/sound.h
@@ -73,6 +73,9 @@
 #undef	USING_DEVFS
 
 #if __FreeBSD_version > 500000
+#include <sys/lock.h>
+#include <sys/mutex.h>
+
 #define USING_MUTEX
 #define USING_DEVFS
 #endif