'\" t
.\"     Title: skb_head_is_locked
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: April 2019
.\"    Manual: Linux Networking
.\"    Source: Kernel Hackers Manual 4.9.168
.\"  Language: English
.\"
.TH "SKB_HEAD_IS_LOCKED" "9" "April 2019" "Kernel Hackers Manual 4\&.9\&." "Linux Networking"
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.SH "NAME"
skb_head_is_locked \- Determine if the skb\->head is locked down
.SH "SYNOPSIS"
.HP \w'bool\ skb_head_is_locked('u
.BI "bool skb_head_is_locked(const\ struct\ sk_buff\ *\ " "skb" ");"
.SH "ARGUMENTS"
.PP
\fIskb\fR
.RS 4
skb to check
.RE
.SH "DESCRIPTION"
.PP
The head on skbs build around a head frag can be removed if they are not cloned\&. This function returns true if the skb head is locked down due to either being allocated via kmalloc, or by being a clone with multiple references to the head\&.
.SH "COPYRIGHT"
.br