diff --git a/sys/kern/vfs_cluster.c b/sys/kern/vfs_cluster.c
index 8644b7f94169..e9e4f612daa0 100644
--- a/sys/kern/vfs_cluster.c
+++ b/sys/kern/vfs_cluster.c
@@ -33,7 +33,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)vfs_cluster.c	8.7 (Berkeley) 2/13/94
- * $Id: vfs_cluster.c,v 1.22 1995/10/09 03:19:49 dyson Exp $
+ * $Id: vfs_cluster.c,v 1.23 1995/10/29 15:31:22 phk Exp $
  */
 
 #include <sys/param.h>
@@ -54,7 +54,7 @@
 #include <vm/vm.h>
 #include <sys/sysctl.h>
 int doreallocblks = 0;
-struct ctldebug debug13 = {"doreallocblks", &doreallocblks};
+SYSCTL_INT(_debug, 13, doreallocblks, CTLFLAG_RW, &doreallocblks, 0, "");
 
 #else
 /* XXX for cluster_write */
diff --git a/sys/kern/vfs_export.c b/sys/kern/vfs_export.c
index ca0621e1ea04..5b0645859b91 100644
--- a/sys/kern/vfs_export.c
+++ b/sys/kern/vfs_export.c
@@ -36,7 +36,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)vfs_subr.c	8.13 (Berkeley) 4/18/94
- * $Id: vfs_subr.c,v 1.39 1995/11/09 08:13:48 bde Exp $
+ * $Id: vfs_subr.c,v 1.40 1995/11/11 00:27:00 bde Exp $
  */
 
 /*
@@ -874,8 +874,7 @@ holdrele(vp)
  */
 #ifdef DIAGNOSTIC
 int busyprt = 0;		/* print out busy vnodes */
-struct ctldebug debug1 = {"busyprt", &busyprt};
-
+SYSCTL_INT(_debug, 1, busyprt, CTLFLAG_RW, &busyprt, 0, "");
 #endif
 
 int
diff --git a/sys/kern/vfs_extattr.c b/sys/kern/vfs_extattr.c
index e8e32e66610f..a2c37dfb89f3 100644
--- a/sys/kern/vfs_extattr.c
+++ b/sys/kern/vfs_extattr.c
@@ -36,7 +36,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)vfs_syscalls.c	8.13 (Berkeley) 4/15/94
- * $Id: vfs_syscalls.c,v 1.38 1995/11/12 06:43:07 bde Exp $
+ * $Id: vfs_syscalls.c,v 1.39 1995/11/13 08:22:21 bde Exp $
  */
 
 #include <sys/param.h>
@@ -316,7 +316,7 @@ dounmount(mp, flags, p)
  */
 #ifdef DIAGNOSTIC
 int syncprt = 0;
-struct ctldebug debug0 = { "syncprt", &syncprt };
+SYSCTL_INT(_debug, 0, syncprt, CTLFLAG_RW, &syncprt, 0, "");
 #endif
 
 #ifndef _SYS_SYSPROTO_H_
diff --git a/sys/kern/vfs_subr.c b/sys/kern/vfs_subr.c
index ca0621e1ea04..5b0645859b91 100644
--- a/sys/kern/vfs_subr.c
+++ b/sys/kern/vfs_subr.c
@@ -36,7 +36,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)vfs_subr.c	8.13 (Berkeley) 4/18/94
- * $Id: vfs_subr.c,v 1.39 1995/11/09 08:13:48 bde Exp $
+ * $Id: vfs_subr.c,v 1.40 1995/11/11 00:27:00 bde Exp $
  */
 
 /*
@@ -874,8 +874,7 @@ holdrele(vp)
  */
 #ifdef DIAGNOSTIC
 int busyprt = 0;		/* print out busy vnodes */
-struct ctldebug debug1 = {"busyprt", &busyprt};
-
+SYSCTL_INT(_debug, 1, busyprt, CTLFLAG_RW, &busyprt, 0, "");
 #endif
 
 int
diff --git a/sys/kern/vfs_syscalls.c b/sys/kern/vfs_syscalls.c
index e8e32e66610f..a2c37dfb89f3 100644
--- a/sys/kern/vfs_syscalls.c
+++ b/sys/kern/vfs_syscalls.c
@@ -36,7 +36,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)vfs_syscalls.c	8.13 (Berkeley) 4/15/94
- * $Id: vfs_syscalls.c,v 1.38 1995/11/12 06:43:07 bde Exp $
+ * $Id: vfs_syscalls.c,v 1.39 1995/11/13 08:22:21 bde Exp $
  */
 
 #include <sys/param.h>
@@ -316,7 +316,7 @@ dounmount(mp, flags, p)
  */
 #ifdef DIAGNOSTIC
 int syncprt = 0;
-struct ctldebug debug0 = { "syncprt", &syncprt };
+SYSCTL_INT(_debug, 0, syncprt, CTLFLAG_RW, &syncprt, 0, "");
 #endif
 
 #ifndef _SYS_SYSPROTO_H_