'\" t
.\"     Title: __napi_alloc_skb
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: June 2017
.\"    Manual: Linux Networking
.\"    Source: Kernel Hackers Manual 4.11.3
.\"  Language: English
.\"
.TH "__NAPI_ALLOC_SKB" "9" "June 2017" "Kernel Hackers Manual 4\&.11\&" "Linux Networking"
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.SH "NAME"
__napi_alloc_skb \- allocate skbuff for rx in a specific NAPI instance
.SH "SYNOPSIS"
.HP \w'struct\ sk_buff\ *\ __napi_alloc_skb('u
.BI "struct sk_buff * __napi_alloc_skb(struct\ napi_struct\ *\ " "napi" ", unsigned\ int\ " "len" ", gfp_t\ " "gfp_mask" ");"
.SH "ARGUMENTS"
.PP
\fIstruct napi_struct * napi\fR
.RS 4
napi instance this buffer was allocated for
.RE
.PP
\fIunsigned int len\fR
.RS 4
length to allocate
.RE
.PP
\fIgfp_t gfp_mask\fR
.RS 4
get_free_pages mask, passed to alloc_skb and alloc_pages
.RE
.SH "DESCRIPTION"
.PP
Allocate a new sk_buff for use in NAPI receive\&. This buffer will attempt to allocate the head from a special reserved region used only for NAPI Rx allocation\&. By doing this we can save several CPU cycles by avoiding having to disable and re\-enable IRQs\&.
.PP
\fBNULL\fR
is returned if there is no free memory\&.
.SH "COPYRIGHT"
.br