'\" t
.\"     Title: skb_share_check
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: January 2017
.\"    Manual: Linux Networking
.\"    Source: Kernel Hackers Manual 4.8.15
.\"  Language: English
.\"
.TH "SKB_SHARE_CHECK" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "Linux Networking"
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.SH "NAME"
skb_share_check \- check if buffer is shared and if so clone it
.SH "SYNOPSIS"
.HP \w'struct\ sk_buff\ *\ skb_share_check('u
.BI "struct sk_buff * skb_share_check(struct\ sk_buff\ *\ " "skb" ", gfp_t\ " "pri" ");"
.SH "ARGUMENTS"
.PP
\fIskb\fR
.RS 4
buffer to check
.RE
.PP
\fIpri\fR
.RS 4
priority for memory allocation
.RE
.SH "DESCRIPTION"
.PP
If the buffer is shared the buffer is cloned and the old copy drops a reference\&. A new clone with a single reference is returned\&. If the buffer is not shared the original buffer is returned\&. When being called from interrupt status or with spinlocks held pri must be GFP_ATOMIC\&.
.PP
NULL is returned on a memory allocation failure\&.
.SH "COPYRIGHT"
.br