'\" t
.\"     Title: kfifo_dma_in_prepare
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
.\"      Date: May 2018
.\"    Manual: FIFO Buffer
.\"    Source: Kernel Hackers Manual 3.16.56
.\"  Language: English
.\"
.TH "KFIFO_DMA_IN_PREPARE" "9" "May 2018" "Kernel Hackers Manual 3\&.16\&" "FIFO Buffer"
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.SH "NAME"
kfifo_dma_in_prepare \- setup a scatterlist for DMA input
.SH "SYNOPSIS"
.HP \w'kfifo_dma_in_prepare('u
.BI "kfifo_dma_in_prepare(" "fifo" ", " "sgl" ", " "nents" ", " "len" ");"
.SH "ARGUMENTS"
.PP
\fIfifo\fR
.RS 4
address of the fifo to be used
.RE
.PP
\fIsgl\fR
.RS 4
pointer to the scatterlist array
.RE
.PP
\fInents\fR
.RS 4
number of entries in the scatterlist array
.RE
.PP
\fIlen\fR
.RS 4
number of elements to transfer
.RE
.SH "DESCRIPTION"
.PP
This macro fills a scatterlist for DMA input\&. It returns the number entries in the scatterlist array\&.
.PP
Note that with only one concurrent reader and one concurrent writer, you don\*(Aqt need extra locking to use these macros\&.
.SH "COPYRIGHT"
.br