diff --git a/sys/kern/subr_prf.c b/sys/kern/subr_prf.c
index f32a1fac725b..617f7880a180 100644
--- a/sys/kern/subr_prf.c
+++ b/sys/kern/subr_prf.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: subr_prf.c,v 1.112 2007/12/30 22:55:21 pooka Exp $	*/
+/*	$NetBSD: subr_prf.c,v 1.113 2008/01/04 18:21:06 ad Exp $	*/
 
 /*-
  * Copyright (c) 1986, 1988, 1991, 1993
@@ -37,7 +37,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: subr_prf.c,v 1.112 2007/12/30 22:55:21 pooka Exp $");
+__KERNEL_RCSID(0, "$NetBSD: subr_prf.c,v 1.113 2008/01/04 18:21:06 ad Exp $");
 
 #include "opt_ddb.h"
 #include "opt_ipkdb.h"
@@ -78,9 +78,7 @@ __KERNEL_RCSID(0, "$NetBSD: subr_prf.c,v 1.112 2007/12/30 22:55:21 pooka Exp $")
 #include <ipkdb/ipkdb.h>
 #endif
 
-#if defined(MULTIPROCESSOR)
 struct simplelock kprintf_slock = SIMPLELOCK_INITIALIZER;
-#endif /* MULTIPROCESSOR */
 
 /*
  * note that stdarg.h and the ansi style va_start macro is used for both
diff --git a/sys/sys/kprintf.h b/sys/sys/kprintf.h
index a96cd2d137a4..5964d5e57465 100644
--- a/sys/sys/kprintf.h
+++ b/sys/sys/kprintf.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: kprintf.h,v 1.8 2007/07/29 09:38:02 pooka Exp $	*/
+/*	$NetBSD: kprintf.h,v 1.9 2008/01/04 18:21:06 ad Exp $	*/
 
 /*-
  * Copyright (c) 1986, 1988, 1991, 1993
@@ -37,8 +37,7 @@
 #ifndef _SYS_KPRINTF_H_
 #define	_SYS_KPRINTF_H_
 
-#include "opt_multiprocessor.h"
-#include <sys/lock.h>
+#include <sys/simplelock.h>
 
 /*
  * Implementation internals of the kernel printf.  Exposing them here
@@ -49,8 +48,6 @@
 /* max size buffer kprintf needs to print quad_t [size in base 8 + \0] */
 #define KPRINTF_BUFSIZE         (sizeof(quad_t) * NBBY / 3 + 2)
 
-#if defined(MULTIPROCESSOR)
-
 extern struct simplelock kprintf_slock;
 
 /*
@@ -70,13 +67,6 @@ do {									\
 	splx((s));							\
 } while (/*CONSTCOND*/0)
 
-#else
-
-#define	KPRINTF_MUTEX_ENTER(s)	(s) = splhigh()
-#define	KPRINTF_MUTEX_EXIT(s)	splx((s))
-
-#endif /* MULTIPROCESSOR */
-
 /* flags for kprintf */
 #define	TOCONS		0x0001	/* to the console */
 #define	TOTTY		0x0002	/* to the process' tty */