'\" t
.\"     Title: netdev_upper_dev_link
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: March 2017
.\"    Manual: Network device support
.\"    Source: Kernel Hackers Manual 4.10.7
.\"  Language: English
.\"
.TH "NETDEV_UPPER_DEV_LIN" "9" "March 2017" "Kernel Hackers Manual 4\&.10\&" "Network device support"
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.SH "NAME"
netdev_upper_dev_link \- Add a link to the upper device
.SH "SYNOPSIS"
.HP \w'int\ netdev_upper_dev_link('u
.BI "int netdev_upper_dev_link(struct\ net_device\ *\ " "dev" ", struct\ net_device\ *\ " "upper_dev" ");"
.SH "ARGUMENTS"
.PP
\fIdev\fR
.RS 4
device
.RE
.PP
\fIupper_dev\fR
.RS 4
new upper device
.RE
.SH "DESCRIPTION"
.PP
Adds a link to device which is upper to this one\&. The caller must hold the RTNL lock\&. On a failure a negative errno code is returned\&. On success the reference counts are adjusted and the function returns zero\&.
.SH "COPYRIGHT"
.br