'\" t
.\"     Title: skb_push
.\"    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: Linux Networking
.\"    Source: Kernel Hackers Manual 4.10.7
.\"  Language: English
.\"
.TH "SKB_PUSH" "9" "March 2017" "Kernel Hackers Manual 4\&.10\&" "Linux Networking"
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.SH "NAME"
skb_push \- add data to the start of a buffer
.SH "SYNOPSIS"
.HP \w'unsigned\ char\ *\ skb_push('u
.BI "unsigned char * skb_push(struct\ sk_buff\ *\ " "skb" ", unsigned\ int\ " "len" ");"
.SH "ARGUMENTS"
.PP
\fIskb\fR
.RS 4
buffer to use
.RE
.PP
\fIlen\fR
.RS 4
amount of data to add
.RE
.SH "DESCRIPTION"
.PP
This function extends the used data area of the buffer at the buffer start\&. If this would exceed the total buffer headroom the kernel will panic\&. A pointer to the first byte of the extra data is returned\&.
.SH "COPYRIGHT"
.br