Index: head/share/man/man9/Makefile
===================================================================
--- head/share/man/man9/Makefile
+++ head/share/man/man9/Makefile
@@ -90,6 +90,7 @@
 	device_add_child.9 \
 	DEVICE_ATTACH.9 \
 	device_delete_child.9 \
+	device_delete_children.9 \
 	DEVICE_DETACH.9 \
 	device_enable.9 \
 	device_find_child.9 \
Index: head/share/man/man9/device_delete_children.9
===================================================================
--- head/share/man/man9/device_delete_children.9
+++ head/share/man/man9/device_delete_children.9
@@ -0,0 +1,58 @@
+.\" -*- nroff -*-
+.\"
+.\" Copyright (c) 2018 Jeroen Ruigrok van der Werven
+.\"
+.\" All rights reserved.
+.\"
+.\" This program is free software.
+.\"
+.\" 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 DEVELOPERS ``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 DEVELOPERS 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 September 28, 2018
+.Dt DEVICE_DELETE_CHILDREN 9
+.Os
+.Sh NAME
+.Nm device_delete_children
+.Nd delete all child devices of a given device
+.Sh SYNOPSIS
+.In sys/param.h
+.In sys/bus.h
+.Ft int
+.Fn device_delete_children "device_t dev"
+.Sh DESCRIPTION
+The
+.Fn device_delete_children
+function deletes all child devices of the given device
+.Fa dev ,
+if any,
+using the
+.Fn device_delete_child
+function for each device it finds.
+If a child device cannot be deleted, this function will return an error code.
+.Sh RETURN VALUES
+Zero is returned on success, a non-zero return value indicates failure.
+.Sh SEE ALSO
+.Xr device_delete_child 9
+.Sh AUTHORS
+This manual page was written by
+.An Jeroen Ruigrok van der Werven .