diff --git a/sys/conf/files b/sys/conf/files
index 21cce504c7c9..2e5bfe23ffa8 100644
--- a/sys/conf/files
+++ b/sys/conf/files
@@ -1,4 +1,4 @@
-#	$NetBSD: files,v 1.958 2009/09/30 20:44:49 jmcneill Exp $
+#	$NetBSD: files,v 1.959 2009/10/02 15:48:41 pooka Exp $
 #	@(#)files.newconf	7.5 (Berkeley) 5/10/93
 
 version 	20090313
@@ -1483,6 +1483,7 @@ file	kern/subr_evcnt.c
 file	kern/subr_exec_fd.c
 file	kern/subr_extent.c
 file	kern/subr_hash.c
+file	kern/subr_humanize.c
 file	kern/subr_kmem.c
 file	kern/subr_kobj.c
 file	kern/subr_lockdebug.c
diff --git a/sys/kern/kern_subr.c b/sys/kern/kern_subr.c
index 0d76f81712b1..3bf6f6eaad49 100644
--- a/sys/kern/kern_subr.c
+++ b/sys/kern/kern_subr.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: kern_subr.c,v 1.200 2009/09/25 19:21:09 dyoung Exp $	*/
+/*	$NetBSD: kern_subr.c,v 1.201 2009/10/02 15:48:41 pooka Exp $	*/
 
 /*-
  * Copyright (c) 1997, 1998, 1999, 2002, 2007, 2008 The NetBSD Foundation, Inc.
@@ -79,7 +79,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: kern_subr.c,v 1.200 2009/09/25 19:21:09 dyoung Exp $");
+__KERNEL_RCSID(0, "$NetBSD: kern_subr.c,v 1.201 2009/10/02 15:48:41 pooka Exp $");
 
 #include "opt_ddb.h"
 #include "opt_md.h"
@@ -1219,78 +1219,6 @@ parsedisk(char *str, int len, int defpart, dev_t *devp)
 	return (dv);
 }
 
-/*
- * snprintf() `bytes' into `buf', reformatting it so that the number,
- * plus a possible `x' + suffix extension) fits into len bytes (including
- * the terminating NUL).
- * Returns the number of bytes stored in buf, or -1 if there was a problem.
- * E.g, given a len of 9 and a suffix of `B':
- *	bytes		result
- *	-----		------
- *	99999		`99999 B'
- *	100000		`97 kB'
- *	66715648	`65152 kB'
- *	252215296	`240 MB'
- */
-int
-humanize_number(char *buf, size_t len, uint64_t bytes, const char *suffix,
-    int divisor)
-{
-       	/* prefixes are: (none), kilo, Mega, Giga, Tera, Peta, Exa */
-	const char *prefixes;
-	int		r;
-	uint64_t	umax;
-	size_t		i, suffixlen;
-
-	if (buf == NULL || suffix == NULL)
-		return (-1);
-	if (len > 0)
-		buf[0] = '\0';
-	suffixlen = strlen(suffix);
-	/* check if enough room for `x y' + suffix + `\0' */
-	if (len < 4 + suffixlen)
-		return (-1);
-
-	if (divisor == 1024) {
-		/*
-		 * binary multiplies
-		 * XXX IEC 60027-2 recommends Ki, Mi, Gi...
-		 */
-		prefixes = " KMGTPE";
-	} else
-		prefixes = " kMGTPE"; /* SI for decimal multiplies */
-
-	umax = 1;
-	for (i = 0; i < len - suffixlen - 3; i++) {
-		umax *= 10;
-		if (umax > bytes)
-			break;
-	}
-	for (i = 0; bytes >= umax && prefixes[i + 1]; i++)
-		bytes /= divisor;
-
-	r = snprintf(buf, len, "%qu%s%c%s", (unsigned long long)bytes,
-	    i == 0 ? "" : " ", prefixes[i], suffix);
-
-	return (r);
-}
-
-int
-format_bytes(char *buf, size_t len, uint64_t bytes)
-{
-	int	rv;
-	size_t	nlen;
-
-	rv = humanize_number(buf, len, bytes, "B", 1024);
-	if (rv != -1) {
-			/* nuke the trailing ` B' if it exists */
-		nlen = strlen(buf) - 2;
-		if (strcmp(&buf[nlen], " B") == 0)
-			buf[nlen] = '\0';
-	}
-	return (rv);
-}
-
 /*
  * Return true if system call tracing is enabled for the specified process.
  */
diff --git a/sys/kern/subr_humanize.c b/sys/kern/subr_humanize.c
new file mode 100644
index 000000000000..9e81a4ecb493
--- /dev/null
+++ b/sys/kern/subr_humanize.c
@@ -0,0 +1,108 @@
+/*	$NetBSD: subr_humanize.c,v 1.1 2009/10/02 15:48:41 pooka Exp $	*/
+
+/*-
+ * Copyright (c) 1997, 1998, 1999, 2002, 2007, 2008 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Luke Mewburn.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: subr_humanize.c,v 1.1 2009/10/02 15:48:41 pooka Exp $");
+
+#include <sys/types.h>
+#include <sys/systm.h>
+
+/*
+ * snprintf() `bytes' into `buf', reformatting it so that the number,
+ * plus a possible `x' + suffix extension) fits into len bytes (including
+ * the terminating NUL).
+ * Returns the number of bytes stored in buf, or -1 if there was a problem.
+ * E.g, given a len of 9 and a suffix of `B':
+ *	bytes		result
+ *	-----		------
+ *	99999		`99999 B'
+ *	100000		`97 kB'
+ *	66715648	`65152 kB'
+ *	252215296	`240 MB'
+ */
+int
+humanize_number(char *buf, size_t len, uint64_t bytes, const char *suffix,
+    int divisor)
+{
+       	/* prefixes are: (none), kilo, Mega, Giga, Tera, Peta, Exa */
+	const char *prefixes;
+	int		r;
+	uint64_t	umax;
+	size_t		i, suffixlen;
+
+	if (buf == NULL || suffix == NULL)
+		return (-1);
+	if (len > 0)
+		buf[0] = '\0';
+	suffixlen = strlen(suffix);
+	/* check if enough room for `x y' + suffix + `\0' */
+	if (len < 4 + suffixlen)
+		return (-1);
+
+	if (divisor == 1024) {
+		/*
+		 * binary multiplies
+		 * XXX IEC 60027-2 recommends Ki, Mi, Gi...
+		 */
+		prefixes = " KMGTPE";
+	} else
+		prefixes = " kMGTPE"; /* SI for decimal multiplies */
+
+	umax = 1;
+	for (i = 0; i < len - suffixlen - 3; i++) {
+		umax *= 10;
+		if (umax > bytes)
+			break;
+	}
+	for (i = 0; bytes >= umax && prefixes[i + 1]; i++)
+		bytes /= divisor;
+
+	r = snprintf(buf, len, "%qu%s%c%s", (unsigned long long)bytes,
+	    i == 0 ? "" : " ", prefixes[i], suffix);
+
+	return (r);
+}
+
+int
+format_bytes(char *buf, size_t len, uint64_t bytes)
+{
+	int	rv;
+	size_t	nlen;
+
+	rv = humanize_number(buf, len, bytes, "B", 1024);
+	if (rv != -1) {
+			/* nuke the trailing ` B' if it exists */
+		nlen = strlen(buf) - 2;
+		if (strcmp(&buf[nlen], " B") == 0)
+			buf[nlen] = '\0';
+	}
+	return (rv);
+}