diff --git a/ObsoleteFiles.inc b/ObsoleteFiles.inc
index 716c168270fe..25b199b99e10 100644
--- a/ObsoleteFiles.inc
+++ b/ObsoleteFiles.inc
@@ -38,6 +38,8 @@
 #   xargs -n1 | sort | uniq -d;
 # done
 
+# 20110709: vm_map_clean.9 -> vm_map_sync.9
+OLD_FILES+=usr/share/man/man9/vm_map_clean.9.gz
 # 20110709: Catch up with removal of these functions.
 OLD_FILES+=usr/share/man/man9/vm_page_copy.9.gz
 OLD_FILES+=usr/share/man/man9/vm_page_protect.9.gz
diff --git a/share/man/man9/Makefile b/share/man/man9/Makefile
index 2aef776cc478..a04cb684a67f 100644
--- a/share/man/man9/Makefile
+++ b/share/man/man9/Makefile
@@ -296,7 +296,6 @@ MAN=	accept_filter.9 \
 	vm_fault_prefault.9 \
 	vm_map.9 \
 	vm_map_check_protection.9 \
-	vm_map_clean.9 \
 	vm_map_create.9 \
 	vm_map_delete.9 \
 	vm_map_entry_resize_free.9 \
@@ -314,6 +313,7 @@ MAN=	accept_filter.9 \
 	vm_map_simplify_entry.9 \
 	vm_map_stack.9 \
 	vm_map_submap.9 \
+	vm_map_sync.9 \
 	vm_map_wire.9 \
 	vm_page_alloc.9 \
 	vm_page_bits.9 \
diff --git a/share/man/man9/vm_map.9 b/share/man/man9/vm_map.9
index 58d4ca6282f6..f45be0b055e6 100644
--- a/share/man/man9/vm_map.9
+++ b/share/man/man9/vm_map.9
@@ -25,7 +25,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd September 26, 2004
+.Dd July 9, 2011
 .Dt VM_MAP 9
 .Os
 .Sh NAME
@@ -324,7 +324,6 @@ is backed by a
 .Sh SEE ALSO
 .Xr pmap 9 ,
 .Xr vm_map_check_protection 9 ,
-.Xr vm_map_clean 9 ,
 .Xr vm_map_create 9 ,
 .Xr vm_map_delete 9 ,
 .Xr vm_map_entry_resize_free 9 ,
@@ -344,6 +343,7 @@ is backed by a
 .Xr vm_map_simplify_entry 9 ,
 .Xr vm_map_stack 9 ,
 .Xr vm_map_submap 9 ,
+.Xr vm_map_sync 9 ,
 .Xr vm_map_wire 9
 .Sh AUTHORS
 This manual page was written by
diff --git a/share/man/man9/vm_map_sync.9 b/share/man/man9/vm_map_sync.9
new file mode 100644
index 000000000000..0ee12193d12e
--- /dev/null
+++ b/share/man/man9/vm_map_sync.9
@@ -0,0 +1,81 @@
+.\"
+.\" Copyright (c) 2003 Bruce M Simpson <bms@spc.org>
+.\" All rights reserved.
+.\"
+.\" 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 AUTHOR 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 AUTHOR 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.
+.\"
+.\" $FreeBSD$
+.\"
+.Dd July 9, 2011
+.Dt VM_MAP_SYNC 9
+.Os
+.Sh NAME
+.Nm vm_map_sync
+.Nd push dirty pages to their pager
+.Sh SYNOPSIS
+.In sys/param.h
+.In vm/vm.h
+.In vm/vm_map.h
+.Ft int
+.Fo vm_map_sync
+.Fa "vm_map_t map" "vm_offset_t start" "vm_offset_t end" "boolean_t syncio"
+.Fa "boolean_t invalidate"
+.Fc
+.Sh DESCRIPTION
+The
+.Fn vm_map_sync
+function forces any dirty cached pages in the range
+.Fa start
+to
+.Fa end
+within the
+.Fa map
+to be pushed to their underlying pager.
+.Pp
+If
+.Fa syncio
+is TRUE, dirty pages are written synchronously.
+.Pp
+If
+.Fa invalidate
+is TRUE, any cached pages are also freed.
+.Pp
+The range provided must be contiguous, it MUST NOT contain holes.
+The range provided MUST NOT contain any sub-map entries.
+.Sh RETURN VALUES
+The
+.Fn vm_map_sync
+function returns
+.Dv KERN_SUCCESS
+if successful.
+.Pp
+Otherwise,
+.Dv KERN_INVALID_ADDRESS
+will be returned if the function encountered a sub-map entry;
+.Dv KERN_INVALID_ARGUMENT
+will be returned if the function encountered a hole in the region provided,
+or if an entry could not be found for the given start address.
+.Sh SEE ALSO
+.Xr vm_map 9
+.Sh AUTHORS
+This manual page was written by
+.An Bruce M Simpson Aq bms@spc.org .