--- /usr/src/sys/kern/subr_bus.c	2009-08-07 12:05:40.000000000 +0300
+++ kern/subr_bus.c	2009-08-07 11:40:21.000000000 +0300
@@ -197,7 +197,7 @@
  */
 static struct sx newbus_lock;
 
-#define	NBL_LOCK_INIT()		sx_init_flags(&newbus_lock, "newbus", SX_RECURSE)
+#define	NBL_LOCK_INIT()		sx_init(&newbus_lock, "newbus")
 #define	NBL_LOCK_DESTROY()	sx_destroy(&newbus_lock)
 #define	NBL_XLOCK()		sx_xlock(&newbus_lock)
 #define	NBL_SLOCK()		sx_slock(&newbus_lock)