'\" t
.\"     Title: skb_cow_head
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
.\"      Date: January 2017
.\"    Manual: Linux Networking
.\"    Source: Kernel Hackers Manual 4.8.15
.\"  Language: English
.\"
.TH "SKB_COW_HEAD" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "Linux Networking"
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.SH "NAME"
skb_cow_head \- skb_cow but only making the head writable
.SH "SYNOPSIS"
.HP \w'int\ skb_cow_head('u
.BI "int skb_cow_head(struct\ sk_buff\ *\ " "skb" ", unsigned\ int\ " "headroom" ");"
.SH "ARGUMENTS"
.PP
\fIskb\fR
.RS 4
buffer to cow
.RE
.PP
\fIheadroom\fR
.RS 4
needed headroom
.RE
.SH "DESCRIPTION"
.PP
This function is identical to skb_cow except that we replace the skb_cloned check by skb_header_cloned\&. It should be used when you only need to push on some header and do not need to modify the data\&.
.SH "COPYRIGHT"
.br